First JWST spectroscopy of GJ 504 b detects multiple molecules, retrieves atmospheric parameters including super-solar metallicity, and finds tentative support for planet-like formation.
hub
Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
19 Pith papers cite this work, alongside 1,371 external citations. Polarity classification is still indexing.
19
Pith papers citing it
1,371
external citations · Crossref
abstract
We present evolutionary models for cool brown dwarfs and extra-solar giant planets. The models reproduce the main trends of observed methane dwarfs in near-IR color-magnitude diagrams. We also present evolutionary models for irradiated planets, coupling for the first time irradiated atmosphere profiles and inner structures. We focus on HD 209458-like systems and show that irradiation effects can substantially affect the radius of sub-jovian mass giant planets. Irradiation effects, however, cannot alone explain the large observed radius of HD 209458b. Adopting assumptions which optimise irradiation effects and taking into account the extension of the outer atmospheric layers, we still find $\sim$ 20% discrepancy between observed and theoretical radii. An extra source of energy seems to be required to explain the observed value of the first transit planet.
hub tools
citation-role summary
background 3
citation-polarity summary
years
2026 19roles
background 3polarities
background 3representative citing papers
A fully Bayesian pixel-based Doppler imaging framework uses Gaussian Process priors and Hamiltonian Monte Carlo to simultaneously infer surface maps and geometric parameters from spectral data.
JWST data on NGTS-10A b shows nightside CH4 depletion caused by day-to-night horizontal transport rather than vertical mixing or non-solar abundances.
Water- and metal-rich atmospheres on compact hot mini-Neptunes lose mass more slowly than H/He cases at high enrichment levels due to enhanced cooling and higher mean molecular weight.
JWST/NIRCam observations of 2024 YR4 extend the orbital arc by eight months, reduce 2032 lunar encounter uncertainty by >30x, and rule out impact with a 22,900 ± 800 km miss distance.
High-contrast imaging of HD 142527 reveals a candidate companion at ~14 au and an Hα spiral in the inner disk, possibly tracing accretion flows linked to companion B.
Close substellar companions suppress metal pollution in white dwarfs by a factor of 5.75 with 87% protection efficiency, backed by observations of 17 systems and N-body simulations.
Two extremely low-density Jupiter-sized planets on long-period orbits around TOI-791 were confirmed via ground-based photometry and TTV-derived masses.
J0404+1112 is a 2.93 hr period totally eclipsing WD+BD system with a hot DA white dwarf (T_eff ~28,000 K) and ~40 M_Jup brown dwarf, enabling isolation of nightside emission and serving as a JWST atmospheric benchmark.
GEODES characterizes three accelerating nearby stars, finding a stellar companion, a 45-Jupiter-mass brown dwarf at about 18 AU, and a 9.5-Jupiter-mass companion that is more likely a planet than a brown dwarf.
TOI-201 has three planets whose co-transiting configuration will end in 200 years due to Kozai-Lidov oscillations driven by mutual inclinations.
Reanalysis of 79 solar twins indicates the Sun's chemical peculiarity is largely explained by Galactic chemical evolution, with 2-6 candidates possibly showing planetary engulfment.
SPHEREx spectra of 37 field brown dwarfs show atmospheric models struggle with J/H/K peaks and 4um window especially at L/T transition, with data preferring weak-mixing Elf Owl models.
Discovery of an L2 brown dwarf companion (mass 53 M_Jup, age ~280 Myr) to HIP 17453 A via proper-motion confirmed imaging and spectroscopy.
Analysis of 50 transiting brown dwarfs and low-mass companions reveals 8.7% average radius inflation compared to models, stronger at separations under 0.05 au.
New companion HIP 53005 C shows strongly conflicting mass estimates of ~80 M_Jup from photometry versus ~185 M_Jup from dynamics, possibly indicating binarity or an unseen closer companion.
Discovery and orbital/stellar characterization of transiting brown dwarf TOI-6884b using TESS photometry corrected by ground-based RV and multi-epoch photometry.
Brown dwarfs modeled with a self-interacting dark matter fluid component show modified radii and second-order Love numbers due to core accumulation.
Two TESS candidates around A-type stars are flagged as promising exoplanets after low false-positive probabilities are calculated for 18 screened objects.
citing papers explorer
-
JWST-TST High Contrast: First Direct Spectroscopy of GJ 504 b reveals Clouds and Possible Metal Enrichment
First JWST spectroscopy of GJ 504 b detects multiple molecules, retrieves atmospheric parameters including super-solar metallicity, and finds tentative support for planet-like formation.
-
Bayesian Doppler Imaging: Simultaneous Inference of Surface Maps and Geometric Parameters
A fully Bayesian pixel-based Doppler imaging framework uses Gaussian Process priors and Hamiltonian Monte Carlo to simultaneously infer surface maps and geometric parameters from spectral data.
-
Horizontal transport as a source of disequilibrium chemistry on the nightside of a hot exoplanet
JWST data on NGTS-10A b shows nightside CH4 depletion caused by day-to-night horizontal transport rather than vertical mixing or non-solar abundances.
-
Escape of Water- and Metal-enriched Atmospheres from compact Hot mini-Neptunes with CHAIN
Water- and metal-rich atmospheres on compact hot mini-Neptunes lose mass more slowly than H/He cases at high enrichment levels due to enhanced cooling and higher mean molecular weight.
-
JWST Observations of Asteroid 2024 YR4 Rule Out a 2032 Lunar Impact and Demonstrate a New Regime for Planetary Defense Follow-up
JWST/NIRCam observations of 2024 YR4 extend the orbital arc by eight months, reduce 2032 lunar encounter uncertainty by >30x, and rule out impact with a 22,900 ± 800 km miss distance.
-
Exploration of the inner region of the system HD 142527
High-contrast imaging of HD 142527 reveals a candidate companion at ~14 au and an Hα spiral in the inner disk, possibly tracing accretion flows linked to companion B.
-
Fates of the sub-stellar objects (FOSSO) II. Evidence for Suppression of Metal Pollution in White Dwarfs by Close Substellar Companions
Close substellar companions suppress metal pollution in white dwarfs by a factor of 5.75 with 87% protection efficiency, backed by observations of 17 systems and N-body simulations.
-
ASTEP confirmation of a pair of long-period Jupiter-sized planets with extremely low densities transiting TOI-791
Two extremely low-density Jupiter-sized planets on long-period orbits around TOI-791 were confirmed via ground-based photometry and TTV-derived masses.
-
J0404+1112: A 3-Hour Eclipsing White Dwarf-Brown Dwarf Probing Multiple Atmospheric Regimes
J0404+1112 is a 2.93 hr period totally eclipsing WD+BD system with a hot DA white dwarf (T_eff ~28,000 K) and ~40 M_Jup brown dwarf, enabling isolation of nightside emission and serving as a JWST atmospheric benchmark.
-
Gaia Exoplanet Orbits, Demographics, and Evolution Survey (GEODES): Characteristics of Three Long-Period Companions Accelerating their Host Stars
GEODES characterizes three accelerating nearby stars, finding a stellar companion, a 45-Jupiter-mass brown dwarf at about 18 AU, and a 9.5-Jupiter-mass companion that is more likely a planet than a brown dwarf.
-
Uncovering the Rapidly Evolving Orbits of the Dynamic TOI-201 System
TOI-201 has three planets whose co-transiting configuration will end in 200 years due to Kozai-Lidov oscillations driven by mutual inclinations.
-
The Sun's chemical peculiarity: disentangling Galactic chemical evolution and planetary engulfment in solar twins
Reanalysis of 79 solar twins indicates the Sun's chemical peculiarity is largely explained by Galactic chemical evolution, with 2-6 candidates possibly showing planetary engulfment.
-
SPHEREx 0.75 to 5 $\mu$m Spectra for a Sequence of Nearby Brown Dwarfs
SPHEREx spectra of 37 field brown dwarfs show atmospheric models struggle with J/H/K peaks and 4um window especially at L/T transition, with data preferring weak-mixing Elf Owl models.
-
The Companions to B and A Stars Snapshot (C-BASS) Survey: I. Discovery of a Young Brown Dwarf Companion to HIP 17453
Discovery of an L2 brown dwarf companion (mass 53 M_Jup, age ~280 Myr) to HIP 17453 A via proper-motion confirmed imaging and spectroscopy.
-
Evidence of Radius Inflation Based on 50 Transiting Brown Dwarfs and Low-mass Stellar Companions
Analysis of 50 transiting brown dwarfs and low-mass companions reveals 8.7% average radius inflation compared to models, stronger at separations under 0.05 au.
-
Discovery of a Low-Mass Companion to the Accelerating Star HIP 53005 with Strongly Conflicting Mass Estimates
New companion HIP 53005 C shows strongly conflicting mass estimates of ~80 M_Jup from photometry versus ~185 M_Jup from dynamics, possibly indicating binarity or an unseen closer companion.
-
TOI-6884b: A low-mass brown dwarf transiting a slightly evolved star
Discovery and orbital/stellar characterization of transiting brown dwarf TOI-6884b using TESS photometry corrected by ground-based RV and multi-epoch photometry.
-
Self-Interacting Dark Matter in Brown Dwarfs
Brown dwarfs modeled with a self-interacting dark matter fluid component show modified radii and second-order Love numbers due to core accumulation.
-
Two Potential Exoplanets around A-type Stars Selected from 18 Planetary Candidates
Two TESS candidates around A-type stars are flagged as promising exoplanets after low false-positive probabilities are calculated for 18 screened objects.