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Comprehensive Ab Initio Quantum Computations of CO-H and CO-He Collisional Properties
Prajwal Niraula, Laurent Wiesenfeld, Nejmeddine Jaïdane +6
We present comprehensive \textsl{ab initio} fully quantum calculations of CO--H and CO--He collisional properties. Our framework combines CCSD(T) pote…
Flares on TRAPPIST-1 reveal the spectrum of magnetic features on its surface
Valeriy Vasilyev, Nadiia Kostogryz, Alexander I. Shapiro +11
TRAPPIST-1 is an M8 dwarf hosting seven known exoplanets and is currently one of the most frequently observed targets of the James Webb Space Telescope (JWST). However, it is notor…
The effect of stellar magnetic activity on measurements of morning and evening asymmetry of planetary terminator
N. Kostogryz, A. I. Shapiro, L. Carone +9
Differences in the ingress and egress shapes of transit light curves can indicate morning-evening temperature contrasts on transiting planets. Here, we pinpoint an alternative mech…
SPECULOOS: five years hunting terrestrial planets around ultra-cool dwarfs
Sebastián Zúñiga-Fernández, Michael Gillon, SPECULOOS consortium
The SPECULOOS (Search for habitable Planets EClipsing ULtra-cOOl Stars) project aims to detect temperate terrestrial planets transiting nearby ultracool dwarfs, including late M-dw…
Gravity-sensitive Spectral Indices in Ultracool Dwarfs: Investigating Correlations with Metallicity and Planet Occurrence using SpeX and FIRE Observations
Fatemeh Davoudi, Benjamin V. Rackham, Julien de Wit +5
We present a near-infrared spectroscopic analysis (0.9--2.4~m) of gravity indices for 56 ultracool dwarfs (M5.5--L0), including exoplanet hosts SPECULOOS-2, SPECULOOS-3, and LHS…
JWST sighting of decameter main-belt asteroids and view on meteorite sources
Artem Y. Burdanov, Julien de Wit, Miroslav Brož +19
Asteroid discoveries are essential for planetary-defense efforts aiming to prevent impacts with Earth, including the more frequent megaton explosions from decameter impactors. Whil…