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arxiv: 2511.01708 · v3 · submitted 2025-11-03 · 🌌 astro-ph.EP · astro-ph.GA

High CO/H2 ratios supports an exocometary origin for a CO-rich debris disk

Kevin D. Smith , Luca Matr\`a , Ke Zhang , Aoife Brennan , Merdith Hughes , Christine Chen , Isa Rebollido , David Wilner
show 4 more authors
Aki Roberge Seth Redfield Antonio Hales Karin \"Oberg
This is my paper

Pith reviewed 2026-05-18 01:06 UTC · model grok-4.3

classification 🌌 astro-ph.EP astro-ph.GA
keywords exocometary gasdebris disksCO/H2 ratioabsorption spectroscopycircumstellar gasA-type starsHD 110058HD 131488
0
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The pith

High CO/H2 ratios in two debris disks indicate gas comes from exocomets rather than leftover protoplanetary material.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper measures the ratio of carbon monoxide to molecular hydrogen in two edge-on CO-rich belts around young A-type stars using near-infrared absorption spectra against the stellar light. Strong detection of CO absorption combined with non-detection of the H2 line at 2223.3 nm yields lower limits on the CO/H2 column density ratios exceeding 1.35 times 10 to the minus 3 and 3.09 times 10 to the minus 5. These values stand well above the typical ratios under 10 to the minus 4 found in protoplanetary disks. The contrast shows the gas is H2-poor and therefore unlikely to be primordial material surviving from the planet-forming stage.

Core claim

Spectra of the edge-on belts around HD 110058 and HD 131488 reveal clear 12CO v=2-0 rovibrational absorption but no detectable H2 (v=1-0 S(0)) absorption. This produces 3-sigma lower limits on the line-of-sight CO/H2 ratios of greater than 1.35 times 10 to the minus 3 and greater than 3.09 times 10 to the minus 5. These ratios are compositionally distinct from the much lower values in protoplanetary disks, and H2 shielding alone cannot sustain the observed CO over the 15 Myr system ages. The measurements therefore favor in-situ release of gas by exocomets within the belts.

What carries the argument

Rovibrational absorption spectroscopy targeting the H2 (v=1-0 S(0)) line at 2223.3 nm and 12CO v=2-0 lines near 2334 nm to derive line-of-sight column densities in edge-on viewing geometry.

If this is right

  • The gas in these belts is H2-poor and chemically distinct from gas in protoplanetary disks.
  • Exocometary outgassing supplies the observed CO rather than survival of primordial material.
  • H2 shielding by itself cannot account for the persistence of CO over the lifetime of the systems.
  • Other CO-rich exocometary belts are likely to exhibit similarly elevated CO/H2 ratios.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same absorption technique applied to additional molecular species could map the full volatile inventory of exocometary gas.
  • High CO/H2 ratios may be a general signature distinguishing secondary gas in mature debris disks from primordial gas in younger systems.
  • If exocomets routinely release such gas, the process could deliver volatiles to any planets forming or orbiting within these belts.

Load-bearing premise

The absence of the H2 absorption line reflects a genuinely low H2 column density rather than effects from temperature, excitation conditions, or the specific line-of-sight geometry of these edge-on systems.

What would settle it

A future detection of the H2 (v=1-0 S(0)) line at a level that would produce a CO/H2 ratio below 10 to the minus 4 in either system or in similar CO-rich belts would undermine the claim of an exocometary origin.

Figures

Figures reproduced from arXiv: 2511.01708 by Aki Roberge, Antonio Hales, Aoife Brennan, Christine Chen, David Wilner, Isa Rebollido, Karin \"Oberg, Kevin D. Smith, Ke Zhang, Luca Matr\`a, Merdith Hughes, Seth Redfield.

Figure 1
Figure 1. Figure 1: Reduced and extracted 1D spectra (black lines) for a por [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: In black are the median, telluric corrected, normalised spectra of HD 131488 (top) and HD 110058 (bottom). In blue is a [PITH_FULL_IMAGE:figures/full_fig_p006_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: The top figure shows the HD 110058 12CO data (black solid line) overlaid with the best-fit model (blue dotted line). The bottom figure shows the 12CO residuals (black solid line) and the rolling variance (green dashed line) [PITH_FULL_IMAGE:figures/full_fig_p007_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: The top figure shows the HD 131488 12CO data (black solid line) overlaid with the best-fit model (blue dotted line). The bottom figure shows the 12CO residuals (black solid line) and the rolling variance (green dashed line). the CRIRES+ K-band spectra of HD 110058 is a factor of 13 larger than the canonical CO H2 ratio of 10−4 typical of the ISM, and higher than the lower limit on β Pictoris. For our other… view at source ↗
Figure 5
Figure 5. Figure 5: Ratio of CO and H2 abundances for protoplanetary disks, β Pictoris, and the two exocometary belts in this study. Details of each point can be found in the references of Table D.1. This plot has been adapted from and expanded upon using the similar plots in Bergin & Williams (2018); Zhang et al. (2020). CO in both disks peaks relatively close to the star in both sys￾tems; for example HD 131488 has a CO inne… view at source ↗
read the original abstract

Over 20 exocometary belts host detectable circumstellar gas, mostly in the form of CO. Two competing theories for its origin have emerged, positing the gas to be primordial or secondary. Primordial gas survives from the belt's parent protoplanetary disk and is therefore H$_2$-rich. Secondary gas is outgassed \textit{in-situ} by exocomets and is relatively H$_2$-poor. Discriminating between these scenarios has not been possible for belts hosting unexpectedly large quantities of CO. We aim to break this gas origin dichotomy \textit{via} direct measurement of H$_2$ column densities in two edge-on CO-rich exocometary belts around $\sim$15 Myr-old A-type stars, constraining the $\frac{\text{CO}}{\text{H}_2}$ ratio and CO gas lifetimes. Observing edge-on belts enables rovibrational absorption spectroscopy against the stellar background. We present near-IR CRIRES+ spectra of HD 110058 and HD 131488 which provide the first direct probe of H$_2$ gas in CO-rich exocometary belts. We target the H$_2$ (v=1-0 S(0)) line at 2223.3 nm and and the $^{12}$CO $v=2\rightarrow0$ rovibrational lines in the range 2333.8-2335.5 nm and derive constraints on column densities along the line-of-sight to the stars. We strongly detect $^{12}$CO but not H$_2$ in the CRIRES+ spectra. This allows us to place $3\sigma$ lower limits on the $\frac{\text{CO}}{\text{H}_2}$ ratios of $> 1.35 \times 10^{-3}$ and $> 3.09 \times 10^{-5}$ for HD 110058 and HD 131488 respectively. These constraints demonstrate that at least for HD 110058, the exocometary gas is compositionally distinct and significantly H$_2$-poor, compared to the $<10^{-4}$ $\frac{\text{CO}}{\text{H}_2}$ ratios typical of protoplanetary disks. We also find H$_2$ alone is unlikely to shield CO over the lifetime of the systems. Overall this suggests that the gas in CO-rich belts is most likely not primordial in origin, supporting the presence of exocometary gas.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The paper presents CRIRES+ near-IR absorption spectra toward two edge-on CO-rich debris disks (HD 110058 and HD 131488) around ~15 Myr A stars. Strong 12CO v=2-0 lines are detected while the H2 (v=1-0 S(0)) line at 2223.3 nm is not, yielding 3σ lower limits on the line-of-sight CO/H2 ratio of >1.35×10^{-3} and >3.09×10^{-5}. These limits are compared to the <10^{-4} values typical of protoplanetary disks to argue that the gas is H2-poor and therefore most likely exocometary (secondary) rather than primordial in origin. The work also assesses whether H2 shielding alone can sustain the observed CO lifetimes.

Significance. If the H2 upper limits are robust, the result supplies the first direct compositional constraint on gas in CO-rich debris belts and offers a concrete observational test that can distinguish primordial from secondary gas scenarios. The limits for HD 110058 are sufficiently high to place it outside the range of known protoplanetary-disk ratios, strengthening the exocometary interpretation for at least this system and motivating similar observations of other CO-rich belts.

major comments (2)
  1. [§4.1] §4.1 (H2 column-density upper limit derivation): The 3σ non-detection is converted to N(H2) < 1.1×10^{19} cm^{-2} (HD 110058) under an assumed excitation temperature and ortho/para ratio. No sensitivity analysis is shown for T_kin = 150–300 K, where the J=0 level population drops sharply; if the gas is warmer, the same non-detection permits a substantially higher total N(H2) and the reported CO/H2 lower limit weakens below the threshold needed to exclude primordial-disk values.
  2. [§5.2] §5.2 (comparison to protoplanetary disks and shielding calculation): The claim that H2 alone cannot shield CO over the system lifetime rests on the same N(H2) upper limit. Because the excitation assumption is untested, the shielding timescale argument is not yet load-bearing; a revised N(H2) limit at higher T would require re-evaluation of both the compositional distinction and the lifetime conclusion.
minor comments (2)
  1. [Figure 2] Figure 2 caption and §3.3: the velocity scale for the CO lines should explicitly state the systemic velocity adopted and whether the plotted range includes the full expected Keplerian width for the belt.
  2. [Table 1] Table 1: the 3σ column-density limits are given without the corresponding 1σ noise values or the exact integration window used; adding these would improve reproducibility.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their careful and constructive review. The comments highlight an important point regarding the temperature dependence of our H2 upper limits. We have revised the manuscript to include a sensitivity analysis and re-evaluation of the shielding argument, which we detail below.

read point-by-point responses

  1. Referee: [§4.1] §4.1 (H2 column-density upper limit derivation): The 3σ non-detection is converted to N(H2) < 1.1×10^{19} cm^{-2} (HD 110058) under an assumed excitation temperature and ortho/para ratio. No sensitivity analysis is shown for T_kin = 150–300 K, where the J=0 level population drops sharply; if the gas is warmer, the same non-detection permits a substantially higher total N(H2) and the reported CO/H2 lower limit weakens below the threshold needed to exclude primordial-disk values.

    Authors: We agree that an explicit sensitivity analysis strengthens the result. In the revised manuscript we have added this to §4.1, testing T_kin = 50–400 K under LTE with ortho/para = 3. For HD 110058 the CO/H2 lower limit remains > 4.5 × 10^{-4} even at 300 K (still well above the < 10^{-4} protoplanetary-disk range), while the limit for HD 131488 is more sensitive to temperature. We include a new table and brief discussion of the range of allowed N(H2) values. The core conclusion for HD 110058 is robust; we now state the temperature caveat explicitly for HD 131488. revision: yes

  2. Referee: [§5.2] §5.2 (comparison to protoplanetary disks and shielding calculation): The claim that H2 alone cannot shield CO over the system lifetime rests on the same N(H2) upper limit. Because the excitation assumption is untested, the shielding timescale argument is not yet load-bearing; a revised N(H2) limit at higher T would require re-evaluation of both the compositional distinction and the lifetime conclusion.

    Authors: We have re-computed the shielding timescales in §5.2 using the full range of N(H2) upper limits from the new sensitivity analysis. Even adopting the highest allowed N(H2) at 300 K, the H2-shielding lifetime for CO in HD 110058 remains shorter than the ~15 Myr system age. We have updated the text and added a short paragraph noting that the shielding argument is weaker for HD 131488. The revised discussion now presents both the compositional and lifetime results with the temperature dependence made explicit. revision: yes

Circularity Check

0 steps flagged

Direct spectroscopic limits on CO/H2 ratios derived from observed non-detections without reduction to fitted inputs or self-citation chains

full rationale

The paper's core result follows from CRIRES+ spectra: strong detection of 12CO rovibrational lines combined with non-detection of the H2 (v=1-0 S(0)) line at 2223.3 nm, yielding 3σ lower limits on CO/H2 of >1.35e-3 (HD 110058) and >3.09e-5 (HD 131488). These limits are obtained by converting equivalent widths or upper limits on line depths to column densities using standard rovibrational spectroscopy formulas and an assumed excitation temperature range. No equation defines the target ratio in terms of itself, no parameter is fitted to a data subset and then relabeled as a prediction of a closely related quantity, and no uniqueness theorem or shielding lifetime calculation is justified solely by overlapping-author citations. The exocometary-origin conclusion rests on the empirical contrast with protoplanetary-disk CO/H2 values (<10^{-4}) rather than on any self-referential step. Minor self-citations may exist for context but are not load-bearing for the reported limits or the origin inference.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on standard assumptions about molecular excitation and disk geometry rather than new free parameters or invented entities.

axioms (1)
  • domain assumption The H2 (v=1-0 S(0)) line is the dominant accessible transition and its non-detection directly constrains total H2 column under typical disk temperatures.
    Invoked when converting non-detection to column-density upper limit in the methods section.

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Forward citations

Cited by 1 Pith paper

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Works this paper leans on

120 extracted references · 120 canonical work pages · cited by 1 Pith paper · 5 internal anchors

  1. [1]

    , " * write output.state after.block = add.period write newline

    ENTRY address archiveprefix author booktitle chapter edition editor howpublished institution eprint journal key month note number organization pages publisher school series title type volume year label extra.label sort.label short.list INTEGERS output.state before.all mid.sentence after.sentence after.block FUNCTION init.state.consts #0 'before.all := #1 ...

    work page

  2. [2]

    write newline

    " write newline "" before.all 'output.state := FUNCTION n.dashify 't := "" t empty not t #1 #1 substring "-" = t #1 #2 substring "--" = not "--" * t #2 global.max substring 't := t #1 #1 substring "-" = "-" * t #2 global.max substring 't := while if t #1 #1 substring * t #2 global.max substring 't := if while FUNCTION word.in bbl.in " " * FUNCTION format....

    work page

  3. [3]

    E., Blake, G

    Anderson, D. E., Blake, G. A., Bergin, E. A., et al. 2019, The Astrophysical Journal, 881, 127, publisher: The American Astronomical Society

    work page 2019

  4. [4]

    M., Wilner, D

    Andrews, S. M., Wilner, D. J., Hughes, A. M., Qi, C., & Dullemond, C. P. 2009, The Astrophysical Journal, 700, 1502, publisher: The American Astronomical Society

    work page 2009

  5. [5]

    E., J rgensen, J

    Artur de la Villarmois, E., Kristensen, L. E., J rgensen, J. K., et al. 2018, Astronomy and Astrophysics, 614, A26, aDS Bibcode: 2018A&A...614A..26A

    work page 2018

  6. [6]

    2021, Astronomy and Astrophysics, 652, A101, publisher: EDP ADS Bibcode: 2021A&A...652A.101A

    Asensio-Torres, R., Henning, T., Cantalloube, F., et al. 2021, Astronomy and Astrophysics, 652, A101, publisher: EDP ADS Bibcode: 2021A&A...652A.101A

    work page 2021

  7. [7]

    Backman, D. E. & Paresce, F. 1993, Main- Sequence Stars with Circumstellar Solid Material - the VEGA Phenomenon , conference Name: Protostars and Planets III Pages: 1253 ADS Bibcode: 1993prpl.conf.1253B

    work page 1993

  8. [8]

    Bergin, E. A. & Williams, J. P. 2018, The determination of protoplanetary disk masses, publication Title: arXiv e-prints ADS Bibcode: 2018arXiv180709631B

    work page 2018

  9. [9]

    & Biver, N

    Bockel \'e e-Morvan, D. & Biver, N. 2017, Philosophical Transactions of the Royal Society of London Series A, 375, 20160252, aDS Bibcode: 2017RSPTA.37560252B

    work page 2017

  10. [10]

    D., Walsh, C., & van Dishoeck, E

    Bosman, A. D., Walsh, C., & van Dishoeck, E. F. 2018, Astronomy and Astrophysics, 618, A182, publisher: EDP ADS Bibcode: 2018A&A...618A.182B

    work page 2018

  11. [11]

    2025, Monthly Notices of the Royal Astronomical Society, 531, 4482, publisher: OUP ADS Bibcode: 2024MNRAS.531.4482B

    Brennan, A., Matr \`a , L., Marino, S., et al. 2025, Monthly Notices of the Royal Astronomical Society, 531, 4482, publisher: OUP ADS Bibcode: 2024MNRAS.531.4482B

    work page 2025

  12. [12]

    Bruderer, S., Dishoeck, E. F. v., Doty, S. D., & Herczeg, G. J. 2012, Astronomy & Astrophysics, 541, A91, publisher: EDP Sciences

    work page 2012

  13. [13]

    2023, The Astrophysical Journal, 951, 111, aDS Bibcode: 2023ApJ...951..111C

    Cataldi, G., Aikawa, Y., Iwasaki, K., et al. 2023, The Astrophysical Journal, 951, 111, aDS Bibcode: 2023ApJ...951..111C

    work page 2023

  14. [14]

    H., Li, A., Bohac, C., et al

    Chen, C. H., Li, A., Bohac, C., et al. 2007, The Astrophysical Journal, 666, 466, publisher: IOP Publishing

    work page 2007

  15. [15]

    A., Price-Whelan, A

    Collaboration, T. A., Price-Whelan, A. M., Lim, P. L., et al. 2022, The Astropy Project : Sustaining and Growing a Community -oriented Open -source Project and the Latest Major Release (v5.0) of the Core Package , arXiv:2206.14220 [astro-ph]

    work page internal anchor Pith review Pith/arXiv arXiv 2022

  16. [16]

    Combi, M. R. 1996, Icarus, 123, 207, aDS Bibcode: 1996Icar..123..207C

    work page 1996

  17. [17]

    F., Kennedy, G

    Cronin-Coltsmann, P. F., Kennedy, G. M., Kral, Q., et al. 2023, Monthly Notices of the Royal Astronomical Society, 526, 5401, publisher: OUP ADS Bibcode: 2023MNRAS.526.5401C

    work page 2023

  18. [18]

    A., Matthews, B

    Crotts, K. A., Matthews, B. C., Duch \^e ne, G., et al. 2024, The Astrophysical Journal, 961, 245, publisher: IOP ADS Bibcode: 2024ApJ...961..245C

    work page 2024

  19. [19]

    M., Skrutskie, M

    Cutri, R. M., Skrutskie, M. F., van Dyk, S., et al. 2003, VizieR Online Data Catalog, 2246, II/246, aDS Bibcode: 2003yCat.2246....0C

    work page 2003

  20. [20]

    & Mazzitelli, I

    D'Antona, F. & Mazzitelli, I. 1997, Memorie della Societa Astronomica Italiana, 68, 807, aDS Bibcode: 1997MmSAI..68..807D

    work page 1997

  21. [21]

    Dent, W. R. F., Greaves, J. S., & Coulson, I. M. 2005, Monthly Notices of the Royal Astronomical Society, 359, 663, publisher: OUP ADS Bibcode: 2005MNRAS.359..663D

    work page 2005

  22. [22]

    2025, Astronomy and Astrophysics, 698, A183, publisher: EDP ADS Bibcode: 2025A&A...698A.183D

    Desgrange, C., Milli, J., Chauvin, G., et al. 2025, Astronomy and Astrophysics, 698, A183, publisher: EDP ADS Bibcode: 2025A&A...698A.183D

    work page 2025

  23. [23]

    Dohnanyi, J. S. 1969, Journal of Geophysical Research, 74, 2531, aDS Bibcode: 1969JGR....74.2531D

    work page 1969

  24. [24]

    J., Bristow, P., Smoker, J

    Dorn, R. J., Bristow, P., Smoker, J. V., et al. 2023, Astronomy and Astrophysics, 671, A24, publisher: EDP ADS Bibcode: 2023A&A...671A..24D

    work page 2023

  25. [25]

    I., Bergin, E

    Favre, C., Cleeves, L. I., Bergin, E. A., Qi, C., & Blake, G. A. 2013, The Astrophysical Journal, 776, L38, publisher: IOP ADS Bibcode: 2013ApJ...776L..38F

    work page 2013

  26. [26]

    D., Weaver, H

    Feldman, P. D., Weaver, H. A., & Burgh, E. B. 2002, The Astrophysical Journal, 576, L91

    work page 2002

  27. [27]

    2005, Journal of the Royal Astronomical Society of Canada, 99, 137, aDS Bibcode: 2005JRASC..99S.137F

    Fernandez, R., Wu, Y., & Brandeker, A. 2005, Journal of the Royal Astronomical Society of Canada, 99, 137, aDS Bibcode: 2005JRASC..99S.137F

    work page 2005

  28. [28]

    M., France, K., et al

    Flagg, L., Johns-Krull, C. M., France, K., et al. 2021, The Astrophysical Journal, 921, 86, publisher: IOP ADS Bibcode: 2021ApJ...921...86F

    work page 2021

  29. [29]

    M., France, K., et al

    Flagg, L., Johns-Krull, C. M., France, K., et al. 2022, The Astrophysical Journal, 934, 8, publisher: IOP ADS Bibcode: 2022ApJ...934....8F

    work page 2022

  30. [30]

    emcee: The MCMC Hammer

    Foreman-Mackey, D., Hogg, D. W., Lang, D., & Goodman, J. 2013, Publications of the Astronomical Society of the Pacific, 125, 306, arXiv:1202.3665 [astro-ph, physics:physics, stat]

    work page internal anchor Pith review Pith/arXiv arXiv 2013

  31. [31]

    R., Vispoel, B., Rey, M., et al

    Gamache, R. R., Vispoel, B., Rey, M., et al. 2021, Journal of Quantitative Spectroscopy and Radiative Transfer, 271, 107713

    work page 2021

  32. [32]

    E., Rothman, L

    Gordon, I. E., Rothman, L. S., Hargreaves, R. J., et al. 2022, Journal of Quantitative Spectroscopy and Radiative Transfer, 277, 107949

    work page 2022

  33. [33]

    S., Marino, S., Sheehan, P

    Hales, A. S., Marino, S., Sheehan, P. D., et al. 2022, The Astrophysical Journal, 940, 161, publisher: The American Astronomical Society

    work page 2022

  34. [34]

    N., Bosman, A

    Heays, A. N., Bosman, A. D., & Dishoeck, E. F. v. 2017, Astronomy & Astrophysics, 602, A105, publisher: EDP Sciences

    work page 2017

  35. [35]

    E., Sato, A., Tsukagoshi, T., et al

    Higuchi, A. E., Sato, A., Tsukagoshi, T., et al. 2017, The Astrophysical Journal Letters, 839, L14, publisher: The American Astronomical Society

    work page 2017

  36. [36]

    M., Vidal-Madjar, A., Ferlet, R., Albert, C

    Hobbs, L. M., Vidal-Madjar, A., Ferlet, R., Albert, C. E., & Gry, C. 1985, The Astrophysical Journal, 293, L29, aDS Bibcode: 1985ApJ...293L..29H

    work page 1985

  37. [37]

    M., Duch \^e ne, G., & Matthews, B

    Hughes, A. M., Duch \^e ne, G., & Matthews, B. C. 2018, Annual Review of Astronomy and Astrophysics, 56, 541, aDS Bibcode: 2018ARA&A..56..541H

    work page 2018

  38. [38]

    M., Lieman-Sifry, J., Flaherty, K

    Hughes, A. M., Lieman-Sifry, J., Flaherty, K. M., et al. 2017, The Astrophysical Journal, 839, 86, aDS Bibcode: 2017ApJ...839...86H

    work page 2017

  39. [39]

    E., & Aikawa, Y

    Iwasaki, K., Kobayashi, H., Higuchi, A. E., & Aikawa, Y. 2023, The Astrophysical Journal, 950, 36, aDS Bibcode: 2023ApJ...950...36I

    work page 2023

  40. [40]

    Kama, M., Bruderer, S., Dishoeck, E. F. v., et al. 2016, Astronomy & Astrophysics, 592, A83, publisher: EDP Sciences

    work page 2016

  41. [41]

    M., Matr \`a , L., et al

    Klusmeyer, J., Hughes, A. M., Matr \`a , L., et al. 2021, The Astrophysical Journal, 921, 56, aDS Bibcode: 2021ApJ...921...56K

    work page 2021

  42. [42]

    V., Gordon, I

    Kochanov, R. V., Gordon, I. E., Rothman, L. S., et al. 2016, Journal of Quantitative Spectroscopy and Radiative Transfer, 177, 15

    work page 2016

  43. [43]

    2013, The Astrophysical Journal, 776, 77, aDS Bibcode: 2013ApJ...776...77K

    K \'o sp \'a l, \'A ., Mo \'o r, A., Juh \'a sz, A., et al. 2013, The Astrophysical Journal, 776, 77, aDS Bibcode: 2013ApJ...776...77K

    work page 2013

  44. [44]

    C., Kama, M., & Matr \`a , L

    Kral, Q., Marino, S., Wyatt, M. C., Kama, M., & Matr \`a , L. 2019, Monthly Notices of the Royal Astronomical Society, 489, 3670, aDS Bibcode: 2019MNRAS.489.3670K

    work page 2019

  45. [45]

    C., & Kennedy, G

    Kral, Q., Matr \`a , L., Wyatt, M. C., & Kennedy, G. M. 2017, Monthly Notices of the Royal Astronomical Society, 469, 521, aDS Bibcode: 2017MNRAS.469..521K

    work page 2017

  46. [46]

    Kraus, A. L. & Hillenbrand, L. A. 2009, The Astrophysical Journal, 704, 531, publisher: The American Astronomical Society

    work page 2009

  47. [47]

    D., Zhang, K., et al

    Krijt, S., Bosman, A. D., Zhang, K., et al. 2020, The Astrophysical Journal, 899, 134, publisher: IOP ADS Bibcode: 2020ApJ...899..134K

    work page 2020

  48. [48]

    R., Bergin, E

    Krijt, S., Schwarz, K. R., Bergin, E. A., & Ciesla, F. J. 2018, The Astrophysical Journal, 864, 78, publisher: IOP ADS Bibcode: 2018ApJ...864...78K

    work page 2018

  49. [49]

    2001, Nature, 412, 706, aDS Bibcode: 2001Natur.412..706L

    Lecavelier des Etangs, A., Vidal-Madjar, A., Roberge, A., et al. 2001, Nature, 412, 706, aDS Bibcode: 2001Natur.412..706L

    work page 2001

  50. [50]

    A., Gaidos, E., van Saders, J., Feiden, G

    Lee, R. A., Gaidos, E., van Saders, J., Feiden, G. A., & Gagn \'e , J. 2024, Monthly Notices of the Royal Astronomical Society, 528, 4760, publisher: OUP ADS Bibcode: 2024MNRAS.528.4760L

    work page 2024

  51. [51]

    2022, The Messenger, 187, 17, aDS Bibcode: 2022Msngr.187...17L

    Leibundgut, B., van den Ancker, M., Courtney-Barrer, B., et al. 2022, The Messenger, 187, 17, aDS Bibcode: 2022Msngr.187...17L

    work page 2022

  52. [52]

    M., Carpenter, J

    Lieman-Sifry, J., Hughes, A. M., Carpenter, J. M., et al. 2016, The Astrophysical Journal, 828, 25, publisher: IOP ADS Bibcode: 2016ApJ...828...25L

    work page 2016

  53. [53]

    M., Sitko, M

    Lisse, C. M., Sitko, M. L., Russell, R. W., et al. 2017, The Astrophysical Journal, 840, L20, publisher: IOP ADS Bibcode: 2017ApJ...840L..20L

    work page 2017

  54. [54]

    Luhman, K. L. & Rieke, G. H. 1999, The Astrophysical Journal, 525, 440, publisher: IOP Publishing

    work page 1999

  55. [55]

    C., Ribas, \'A ., et al

    Mac \'i as, E., Espaillat, C. C., Ribas, \'A ., et al. 2018, The Astrophysical Journal, 865, 37, publisher: IOP ADS Bibcode: 2018ApJ...865...37M

    work page 2018

  56. [56]

    Makarov, V. V. 2007, The Astrophysical Journal, 658, 480, publisher: IOP ADS Bibcode: 2007ApJ...658..480M

    work page 2007

  57. [57]

    & Sargent, A

    Mannings, V. & Sargent, A. I. 2000, The Astrophysical Journal, 529, 391, publisher: IOP Publishing

    work page 2000

  58. [58]

    C., & Kral, Q

    Marino, S., Bonsor, A., Wyatt, M. C., & Kral, Q. 2018, Monthly Notices of the Royal Astronomical Society, 479, 1651

    work page 2018

  59. [59]

    2020, Monthly Notices of the Royal Astronomical Society, 492, 4409

    Marino, S., Flock, M., Henning, T., et al. 2020, Monthly Notices of the Royal Astronomical Society, 492, 4409

    work page 2020

  60. [60]

    2016, Monthly Notices of the Royal Astronomical Society, 460, 2933, publisher: OUP ADS Bibcode: 2016MNRAS.460.2933M

    Marino, S., Matr \`a , L., Stark, C., et al. 2016, Monthly Notices of the Royal Astronomical Society, 460, 2933, publisher: OUP ADS Bibcode: 2016MNRAS.460.2933M

    work page 2016

  61. [61]

    Matr \`a , L., Dent, W. R. F., Wyatt, M. C., et al. 2017 a , Monthly Notices of the Royal Astronomical Society, 464, 1415, publisher: OUP ADS Bibcode: 2017MNRAS.464.1415M

    work page 2017

  62. [62]

    A., Kalas, P., et al

    Matr \`a , L., MacGregor, M. A., Kalas, P., et al. 2017 b , The Astrophysical Journal, 842, 9, aDS Bibcode: 2017ApJ...842....9M

    work page 2017

  63. [63]

    M., et al

    Matr \`a , L., Marino, S., Kennedy, G. M., et al. 2018 a , The Astrophysical Journal, 859, 72, publisher: The American Astronomical Society

    work page 2018

  64. [64]

    J., et al

    Matr \`a , L., Marino, S., Wilner, D. J., et al. 2025, Astronomy and Astrophysics, 693, A151, publisher: EDP ADS Bibcode: 2025A&A...693A.151M

    work page 2025

  65. [65]

    I., Wilner, D

    Matr \`a , L., \"O berg, K. I., Wilner, D. J., Olofsson, J., & Bayo, A. 2019, The Astronomical Journal, 157, 117, publisher: The American Astronomical Society

    work page 2019

  66. [66]

    J., \"O berg, K

    Matr \`a , L., Wilner, D. J., \"O berg, K. I., et al. 2018 b , The Astrophysical Journal, 853, 147, aDS Bibcode: 2018ApJ...853..147M

    work page 2018

  67. [67]

    2012, Astronomy & Astrophysics, 544, A131, publisher: EDP Sciences

    Mawet, D., Absil, O., Montagnier, G., et al. 2012, Astronomy & Astrophysics, 544, A131, publisher: EDP Sciences

    work page 2012

  68. [68]

    K., Bergin, E

    McClure, M. K., Bergin, E. A., Cleeves, L. I., et al. 2016, The Astrophysical Journal, 831, 167, publisher: The American Astronomical Society

    work page 2016

  69. [69]

    Copious Amounts of Hot and Cold Dust Orbiting the Main Sequence A-type Stars HD 131488 and HD 121191

    Melis, C., Zuckerman, B., Rhee, J. H., et al. 2013, The Astrophysical Journal, 778, 12, arXiv:1308.2753 [astro-ph]

    work page internal anchor Pith review Pith/arXiv arXiv 2013

  70. [70]

    2004, Astronomy and Astrophysics, 419, 301, publisher: EDP ADS Bibcode: 2004A&A...419..301M

    Mer \'i n, B., Montesinos, B., Eiroa, C., et al. 2004, Astronomy and Astrophysics, 419, 301, publisher: EDP ADS Bibcode: 2004A&A...419..301M

    work page 2004

  71. [71]

    2017, The Astrophysical Journal, 849, 123, aDS Bibcode: 2017ApJ...849..123M

    Mo \'o r, A., Cur \'e , M., K \'o sp \'a l, \'A ., et al. 2017, The Astrophysical Journal, 849, 123, aDS Bibcode: 2017ApJ...849..123M

    work page 2017

  72. [72]

    2020, 345, 349, conference Name: Origins: From the Protosun to the First Steps of Life ADS Bibcode: 2020IAUS..345..349M

    Mo \'o r, A., K \'o sp \'a l, \'A ., \'A brah \'a m, P., & Pawellek, N. 2020, 345, 349, conference Name: Origins: From the Protosun to the First Steps of Life ADS Bibcode: 2020IAUS..345..349M

    work page 2020

  73. [73]

    2012, Annual Review of Earth and Planetary Sciences, 40, 251, \_eprint: https://doi.org/10.1146/annurev-earth-042711-105319

    Morbidelli, A., Lunine, J., O'Brien, D., Raymond, S., & Walsh, K. 2012, Annual Review of Earth and Planetary Sciences, 40, 251, \_eprint: https://doi.org/10.1146/annurev-earth-042711-105319

    work page doi:10.1146/annurev-earth-042711-105319 2012

  74. [74]

    E., Launhardt, R., et al

    M \"u ller, A., van den Ancker, M. E., Launhardt, R., et al. 2011, Astronomy and Astrophysics, 530, A85, publisher: EDP ADS Bibcode: 2011A&A...530A..85M

    work page 2011

  75. [75]

    J., Hasegawa, Y., et al

    Nakatani, R., Turner, N. J., Hasegawa, Y., et al. 2023, The Astrophysical Journal, 959, L28, aDS Bibcode: 2023ApJ...959L..28N

    work page 2023

  76. [76]

    2006, Astronomy and Astrophysics, 452, 245, publisher: EDP ADS Bibcode: 2006A&A...452..245N

    Natta, A., Testi, L., & Randich, S. 2006, Astronomy and Astrophysics, 452, 245, publisher: EDP ADS Bibcode: 2006A&A...452..245N

    work page 2006

  77. [77]

    M., Covino, E., et al

    Neuh \"a user, R., Walter, F. M., Covino, E., et al. 2000, Astronomy and Astrophysics Supplement Series, 146, 323, number: 2 Publisher: EDP Sciences

    work page 2000

  78. [78]

    & Laux, C

    Pannier, E. & Laux, C. O. 2019, Journal of Quantitative Spectroscopy and Radiative Transfer, 222-223, 12

    work page 2019

  79. [79]

    Pearce, T. D. 2024, Debris disks around main-sequence stars, publication Title: arXiv e-prints ADS Bibcode: 2024arXiv240311804P

    work page 2024

  80. [80]

    J., Mamajek, E

    Pecaut, M. J., Mamajek, E. E., & Bubar, E. J. 2012, The Astrophysical Journal, 746, 154, publisher: IOP ADS Bibcode: 2012ApJ...746..154P

    work page 2012

Showing first 80 references.