activity
20132026
most citedSeventy six T dwarfs from the UKIDSS LAS: benchmarks, kinematics and an updated space density

127 citations · 363 across the 22 of their papers we have counts for

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Showing astro-ph.EPShow all

15 papers · 1 filter

astro-ph.EP2026

Time-resolved JWST Retrieval Analysis of the Coldest Brown Dwarf: Temperature and Chemical Variations in WISE 0855-07

Harshil Kothari, Caroline V. Morley, Brittany E. Miles +12

WISE J0855-07 is the coldest known brown dwarf (estimated Teff~250 K), offering a rare opportunity to probe atmospheric physics in the temperature and mass regime that overlaps dir…

astro-ph.EP2026

Water Cloud and Chemical Modulations in the Coldest Brown Dwarf

Brittany E. Miles, James Mang, Caroline V. Morley +24

We present high signal-to-noise, medium resolution (R ~ 1000), time-series JWST/NIRSpec spectra of WISE 0855 (265K), the coldest known brown dwarf. Medium resolution, time-series s…

astro-ph.EP2026

The Sonora Substellar Atmosphere Models. VII. Flame Skimmer: Cloud-free Atmospheric and Evolutionary Models for the Coldest Substellar Objects

James Mang, Yayaati Chachan, Caroline V. Morley +7

JWST has provided unprecedented access to ultra-cool brown dwarfs and has pushed the boundaries of directly imaging temperate giant planets. As we continue to push toward detecting…

astro-ph.EP2026

Atmospheric Signatures of Common Envelope Evolution in White Dwarf Planets

Sydney Jenkins, Andrew Vanderburg, James Mang +4

The majority of confirmed exoplanets orbit within 1 au of a main-sequence (MS) star. When their stellar hosts evolve off the MS, many of these planets will be engulfed and destroye…

astro-ph.EP2026

JWST unveils a high mean molecular weight atmosphere for mini-Neptune TOI-1130b: Evidence for formation beyond the water ice line

Saugata Barat, Tyler Fairnington, Shelby Courreges +21

We present the combined JWST/NIRSpec G395H and NIRISS SOSS transmission spectrum of a warm mini-Neptune, TOI-1130b (3.66 R, 19.8 M, K). It is…

astro-ph.EP2025

HET/HPF observations of Helium in warm, hot, and ultra-hot Jupiters

Jaume Orell-Miquel, Kyra Sampson, Caroline V. Morley +5

The near-infrared helium triplet line is a powerful tool for studying atmospheric escape processes of close-in exoplanets, especially irradiated gas giants. Line profile fitting pr…

astro-ph.EP2025★ 26 cited

Silicate clouds and a circumplanetary disk in the YSES-1 exoplanet system

Kielan K. W. Hoch, Melanie Rowland, Simon Petrus +26

Young exoplanets provide a critical link between understanding planet formation and atmospheric evolution. Direct imaging spectroscopy allows us to infer the properties of young, w…

astro-ph.EP2025★ 19 cited

The Sonora Substellar Atmosphere Models. V: A Correction to the Disequilibrium Abundance of CO for Sonora Elf Owl

Nicholas F. Wogan, James Mang, Natasha E. Batalha +6

To aid the interpretation of observations of substellar atmospheres, Mukherjee et al. (2024) created the Sonora Elf Owl grid of model atmospheres, simulations that accounted for di…

astro-ph.EP2025

Thermal Emission and Confirmation of the Frigid White Dwarf Exoplanet WD 1856+534b

Mary Anne Limbach, Andrew Vanderburg, Ryan J. MacDonald +12

We report the detection of thermal emission from and confirm the planetary nature of WD 1856+534b, the first transiting planet known to orbit a white dwarf star. Observations with…

astro-ph.EP2025★ 64 cited

A temperate super-Jupiter imaged with JWST in the mid-infrared

E. C. Matthews, A. L. Carter, P. Pathak +16

Of the ~25 directly imaged planets to date, all are younger than 500Myr and all but 6 are younger than 100Myr. Eps Ind A (HD209100, HIP108870) is a K5V star of roughly solar age (r…

astro-ph.EP2024

Disequilibrium Chemistry, Diabatic Thermal Structure, and Clouds in the Atmosphere of COCONUTS-2b

Zhoujian Zhang, Sagnick Mukherjee, Michael C. Liu +12

Located 10.888 pc from Earth, COCONUTS-2b is a planetary-mass companion to a young (150-800 Myr) M3 star, with a wide orbital separation (6471 au) and a low companion-to-host mass…

astro-ph.EP2024★ 23 cited

The Thermal Emission Spectrum of the Nearby Rocky Exoplanet LTT 1445A b from JWST MIRI/LRS

Patcharapol Wachiraphan, Zachory K. Berta-Thompson, Hannah Diamond-Lowe +7

The nearby transiting rocky exoplanet LTT 1445A b presents an ideal target for studying atmospheric retention in terrestrial planets orbiting M dwarfs. It is cooler than many rocky…

astro-ph.EP2024★ 6 cited

Cold day-side winds shape large leading streams in evaporating exoplanet atmospheres

F. Nail, M. MacLeod, A. Oklopčić +3

Recent observations of planetary atmospheres in HAT-P-32 b and HAT-P-67 b reveal extensive outflows reaching up to hundreds of planetary radii. The helium 1083 nm light curves for…

astro-ph.EP2024★ 14 cited

Global weather map reveals persistent top-of-atmosphere features on the nearest brown dwarfs

Xueqing Chen, Beth A. Biller, Johanna M. Vos +10

Brown dwarfs and planetary-mass companions display rotationally modulated photometric variability, especially those near the L/T transition. This variability is commonly attributed…

astro-ph.EP2023

The Carbon-Deficient Evolution of TRAPPIST-1c

Katie E. Teixeira, Caroline V. Morley, Bradford J. Foley +1

Transiting planets orbiting M dwarfs provide the best opportunity to study the atmospheres of rocky planets with current facilities. As JWST enters its second year of science opera…