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20242026
most citedA Panchromatic JWST Spectrum of a Giant Starspot on the Fully Convective M-dwarf TOI-3884

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astro-ph.EP2025

JWST TRAPPIST-1 e/b Program: Motivation and first observations

Natalie H. Allen, Néstor Espinoza, V. A. Boehm +24

One of the forefront goals in the field of exoplanets is the detection of an atmosphere on a temperate terrestrial exoplanet, and among the best suited systems to do so is TRAPPIST…

astro-ph.EP2025

TOI-7166 b: A Habitable Zone mini-Neptune planet around a nearby low-mass star

Khalid Barkaoui, Francisco J. Pozuelos, Benjamin V. Rackham +41

We present the discovery and validation of TOI-7166b, a 2.01+/-0.05R_Earth planet orbiting a nearby low-mass star. We validated the planet by combining TESS and multi-color high-pr…

astro-ph.EP2025

Separating flare and secondary atmospheric signals with RADYN modeling of near-infrared JWST transmission spectroscopy observations of TRAPPIST-1

Ward S. Howard, Adam F. Kowalski, Michael Radica +10

Although TRAPPIST-1's temperate planets have the highest transmission signals of any known system, flares contaminate 50-70% of transits at the 1000 ppm level, far above 100 ppm se…

astro-ph.EP2025

Horizontal and vertical exoplanet thermal structure from a JWST spectroscopic eclipse map

Ryan C. Challener, Megan Weiner Mansfield, Patricio E. Cubillos +33

Highly-irradiated giant exoplanets known as "ultra-hot Jupiters" are anticipated to exhibit large variations of atmospheric temperature and chemistry as a function of longitude, la…

astro-ph.EP2025

MANGOS II: Five new giant planets orbiting low-mass stars

G. Dransfield, M. Timmermans, D. Sebastian +47

Giant planets orbiting low-mass stars on short orbits present a conundrum, as in the most extreme cases their existence cannot be reconciled with current models of core accretion.…

astro-ph.EP2025

What's in Your Transit? Towards Reliably Getting More Science from Exoplanet Transit Data

Samson J. Mercier, Julien de Wit, Benjamin V. Rackham

Exoplanetary science heavily relies on transit depth () measurements. Yet, as instrumental precision increases, the uncertainty on appears to increasingly drift from expecta…