FUor masses inferred from Keplerian line broadening in H-band spectra match the solar neighborhood IMF, indicating a universal eruptive phase during star formation.
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14 Pith papers cite this work. Polarity classification is still indexing.
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A spatial-variability proxy method applied to MURaM and MPS-ATLAS simulations of the Sun reveals stronger line-strength variations in neutral-element lines and larger central-wavelength shifts in singly-ionized lines.
The paper delivers the first empirical masses and radii for the doubly-magnetic binary ε Lupi from combined photometry and radial velocities and classifies additional variability as g-mode pulsations of an SPB star.
The diagnostic separates granulation-sensitive and stable lines in late-G and K dwarfs, with FeI lines showing lower velocity sensitivity than FeII as effective temperature decreases, making solar line selections non-portable.
Synthetic spectra tests show Zeeman broadening recovers M dwarf magnetic field strengths more reliably with joint abundance fitting and WAIC selection than with free line strengths or BIC/AIC, which underestimate by 30-50% in active cases.
TOI-4311 hosts a 0.99-day super-Earth (1.38 R_earth, 4.5 M_earth) and 15-day sub-Neptune (2.47 R_earth), plus a candidate 38-day planet, with the dense inner planet potentially challenging formation theories given the host's galactic population.
Doppler images of UX Arietis show dominant mid-to-high latitude starspots with equatorial appendages that shift by half a rotation phase between 2017 and 2024, plus weak anti-solar differential rotation with a tidally locked equator.
Simulations indicate that order-of-magnitude changes in TiO2 and SiO2 abundances in lava melts produce distinguishable TiO, SiO, and SiO2 features in dry lava planet emission spectra, potentially observable with 12 JWST eclipses for the brightest targets.
Negative Ca II IRT residual indices in FGK stars arise mainly because synthetic photospheric templates miss chromospheric structure and NLTE effects that deepen the observed cores.
Tier 1 Ariel spectra suffice for sub-1.5 dex constraints on H2O and CO2 in giant-planet atmospheres, with higher tiers providing only incremental gains and more molecules in select cases.
WASP-96b shows super-solar metallicity of 2-6x stellar, roughly stellar C/O, tentative SO2 consistent with photochemistry, and an optical slope from scattering aerosols, supporting core-accretion formation beyond the water snowline.
High-precision abundances and Ba isotopic ratios in TYC 6044-714-1 favor an s+r nucleosynthesis scenario over i-process models, which require implausible conditions and mismatch isotopic data.
Photometric metallicities from DECam identify 213 Jet stream candidates and detect fanning in the stream morphology.
New non-LTE abundances for three Bootes I stars show an alpha-element transition at [Fe/H] between -3 and -2, interpreted as the onset of type Ia supernova contributions in this ultra-faint dwarf galaxy.
citing papers explorer
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The FUor Mass Distribution Matches the Solar Neighborhood IMF: Evidence for a Universal Eruptive Phase
FUor masses inferred from Keplerian line broadening in H-band spectra match the solar neighborhood IMF, indicating a universal eruptive phase during star formation.
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Sensitivity of spectral lines to granulation: The Sun
A spatial-variability proxy method applied to MURaM and MPS-ATLAS simulations of the Sun reveals stronger line-strength variations in neutral-element lines and larger central-wavelength shifts in singly-ionized lines.
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$\varepsilon$ Lupi: measuring the heartbeat of a doubly-magnetic massive binary with BRITE-Constellation
The paper delivers the first empirical masses and radii for the doubly-magnetic binary ε Lupi from combined photometry and radial velocities and classifies additional variability as g-mode pulsations of an SPB star.
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Sensitivity of spectral lines to granulation: from the Sun to K-type stars
The diagnostic separates granulation-sensitive and stable lines in late-G and K dwarfs, with FeI lines showing lower velocity sensitivity than FeII as effective temperature decreases, making solar line selections non-portable.
-
Testing the reliability of magnetic field strength measurements for M dwarfs
Synthetic spectra tests show Zeeman broadening recovers M dwarf magnetic field strengths more reliably with joint abundance fitting and WAIC selection than with free line strengths or BIC/AIC, which underestimate by 30-50% in active cases.
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An Ultra-Short Period Super-Earth and a Sub-Neptune Orbiting the K dwarf TOI-4311
TOI-4311 hosts a 0.99-day super-Earth (1.38 R_earth, 4.5 M_earth) and 15-day sub-Neptune (2.47 R_earth), plus a candidate 38-day planet, with the dense inner planet potentially challenging formation theories given the host's galactic population.
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Starspot activity and surface differential rotation on UX Arietis
Doppler images of UX Arietis show dominant mid-to-high latitude starspots with equatorial appendages that shift by half a rotation phase between 2017 and 2024, plus weak anti-solar differential rotation with a tidally locked equator.
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Sensitivity of Dry Lava Planet Atmospheric Emission Spectra to Changes in Lava Compositions
Simulations indicate that order-of-magnitude changes in TiO2 and SiO2 abundances in lava melts produce distinguishable TiO, SiO, and SiO2 features in dry lava planet emission spectra, potentially observable with 12 JWST eclipses for the brightest targets.
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Revisiting Ca II Activity Indices in FGK Stars: Systematic Biases in Infrared Triplet Measurements
Negative Ca II IRT residual indices in FGK stars arise mainly because synthetic photospheric templates miss chromospheric structure and NLTE effects that deepen the observed cores.
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On the Information Content of Ariel Transmission Spectra: Reassessing the Tier System
Tier 1 Ariel spectra suffice for sub-1.5 dex constraints on H2O and CO2 in giant-planet atmospheres, with higher tiers providing only incremental gains and more molecules in select cases.
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Super-Solar Metallicity and Tentative Evidence for Photochemistry on WASP-96b from JWST and Ground-Based VLT Transmission Spectroscopy
WASP-96b shows super-solar metallicity of 2-6x stellar, roughly stellar C/O, tentative SO2 consistent with photochemistry, and an optical slope from scattering aerosols, supporting core-accretion formation beyond the water snowline.
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Observational Signatures and Constraints on the Intermediate Neutron-Capture Process. The Case of the CEMP star TYC 6044-714-1 (RAVE J094921.8-161722)
High-precision abundances and Ba isotopic ratios in TYC 6044-714-1 favor an s+r nucleosynthesis scenario over i-process models, which require implausible conditions and mismatch isotopic data.
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The DECam MAGIC Survey: Investigating the Jet Stellar Stream with Photometric Metallicities
Photometric metallicities from DECam identify 213 Jet stream candidates and detect fanning in the stream morphology.
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Contribution of type Ia supernovae to the chemical enrichment of the ultra-faint dwarf galaxy Bootes I
New non-LTE abundances for three Bootes I stars show an alpha-element transition at [Fe/H] between -3 and -2, interpreted as the onset of type Ia supernova contributions in this ultra-faint dwarf galaxy.