Showing 2024 · astro-ph.EPShow all

66 papers · 2 filters

astro-ph.EP2024★ 23 cited

MINDS. JWST-MIRI reveals a peculiar CO-rich chemistry in the drift-dominated disk CX Tau

Marissa Vlasblom, Milou Temmink, Sierra L. Grant +20

Radial drift of icy pebbles can have a large impact on the chemistry of the inner regions of protoplanetary disks. Compact dust disks (50 au) are suggested to have a high…

astro-ph.EP2024★ 53 cited

Combined analysis of the 12.8 and 15 JWST/MIRI eclipse observations of TRAPPIST-1 b

Elsa Ducrot, Pierre-Olivier Lagage, Michiel Min +36

The first JWST/MIRI photometric observations of TRAPPIST-1 b allowed for the detection of the thermal emission of the planet at 15 , suggesting that the planet could be a bare…

astro-ph.EP2024★ 10 cited

Characterization of seven transiting systems including four warm Jupiters from SOPHIE and TESS

N. Heidari, G. H'ebrard, E. Martioli +65

We present the study of seven systems, three of which TOI-2295, TOI-2537, and TOI-5110 are newly discovered planetary systems. Through the analysis of TESS photometry, SOPHIE radia…

astro-ph.EP2024★ 5 cited

Machine learning approach for mapping the stable orbits around planets

Tiago F. L. L. Pinheiro, Rafael Sfair, Giovana Ramon

Numerical N-body simulations are commonly used to explore stability regions around exoplanets, offering insights into the possible existence of satellites and ring systems. This st…

astro-ph.EP2024★ 2 cited

DARWEN: Data-driven Algorithm for Reduction of Wide Exoplanetary Networks

A. Lira-Barria, J. N. Harvey, T. Konings +5

Exoplanet atmospheric modeling is advancing from chemically diverse one-dimensional (1D) models to three-dimensional (3D) global circulation models (GCMs), which are crucial for in…

astro-ph.EP2024★ 5 cited

An impact-free mechanism to deliver water to terrestrial planets and exoplanets

Quentin Kral, Paul Huet, Camille Bergez-Casalou +3

To date, the most widespread scenario is that the Earth originated without water and was brought to the planet mainly due to impacts by wet asteroids coming from further out in spa…

astro-ph.EP2024★ 19 cited

Stellar occultations by Trans-Neptunian Objects

Bruno Sicardy, Felipe Braga-Ribas, Marc W. Buie +2

Stellar occultations provide a powerful tool to explore objects of the outer solar system. The Gaia mission now provides milli-arcsec accuracy on the predictions of these events an…

astro-ph.EP2024★ 12 cited

The COBREX archival survey: improved constraints on the occurrence rate of wide-orbit substellar companions. I. A uniform re-analysis of 400 stars from the GPIES survey

V. Squicciarini, J. Mazoyer, A. -M. Lagrange +4

Direct imaging (DI) campaigns are uniquely suited to probing the outer regions around young stars and looking for giant exoplanet and brown dwarf companions, hence providing key co…

astro-ph.EP2024★ 9 cited

Breaking degeneracies in exoplanetary parameters through self-consistent atmosphere-interior modelling

Christian Wilkinson, Benjamin Charnay, Stéphane Mazevet +5

Context: A new generation of instruments (e.g., JWST, ELTs, PLATO and Ariel) is providing atmospheric spectra and mass/radius measurements for large exoplanet populations, challeng…

astro-ph.EP2024★ 6 cited

The Polar Stratosphere of Jupiter

Vincent Hue, Thibault Cavalié, James A. Sinclair +13

Observations of the Jovian upper atmosphere at high latitudes in the UV, IR and mm/sub-mm all indicate that the chemical distributions and thermal structure are broadly influenced…

astro-ph.EP2024★ 5 cited

Large Interferometer For Exoplanets (LIFE). XIV. Finding terrestrial protoplanets in the galactic neighborhood

Lorenzo Cesario, Tim Lichtenberg, Eleonora Alei +62

The increased brightness temperature of young rocky protoplanets during their magma ocean epoch makes them potentially amenable to atmospheric characterization to distances from th…

astro-ph.EP2024★ 26 cited

Water depletion and 15NH3 in the atmosphere of the coldest brown dwarf observed with JWST/MIRI

H. Kühnle, P. Patapis, P. Mollière +21

With a temperature of K WISE0855 is the coldest brown dwarf observed so far. Using the James Webb Space Telescope (JWST) we obtained observations that allow us to charac…

astro-ph.EP2024★ 10 cited

A general machine learning model of aluminosilicate melt viscosity and its application to the surface properties of dry lava planets

Charles Le Losq, Clément Ferraina, Paolo A. Sossi +1

Ultra-short-period exoplanets like K2-141 b likely have magma oceans on their dayside, which play a critical role in redistributing heat within the planet. This could lead to a war…

astro-ph.EP2024★ 34 cited

The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites

Fridolin Spitzer, Thorsten Kleine, Christoph Burkhardt +88

The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the sugge…

astro-ph.EP2024★ 6 cited

The Thermal Structure and Composition of Jupiter's Great Red Spot From JWST/MIRI

Jake Harkett, Leigh N. Fletcher, Oliver R. T. King +15

Jupiter's Great Red Spot (GRS) was mapped by the James Webb Space Telescope (JWST)/Mid-Infrared Instrument (4.9-27.9 micron) in July and August 2022. These observations took place…

astro-ph.EP2024★ 8 cited

Giant planets population around B stars from the first part of the BEAST survey

P. Delorme, A. Chomez, V. Squicciarini +23

Exoplanets form from circumstellar protoplanetary discs whose fundamental properties (notably their extent, composition, mass, temperature and lifetime) depend on the host star pro…

astro-ph.EP2024★ 4 cited

Searching for substellar companion candidates with Gaia. II. A catalog of 9,698 planet candidate solar-type hosts

Flavien Kiefer, Anne-Marie Lagrange, Pascal Rubini +1

In a previous paper, we introduced a new tool called GaiaPMEX. It characterizes the mass and semi-major axis relative to the central star (sma) of a possible companion around any s…

astro-ph.EP2024★ 9 cited

Searching for substellar companion candidates with Gaia. I. Introducing the GaiaPMEX tool

Flavien Kiefer, Anne-Marie Lagrange, Pascal Rubini +1

The Gaia mission is expected to yield the detection of several thousands of exoplanets, perhaps at least doubling the number of known exoplanets. Although the harvest is expected t…

astro-ph.EP2024★ 13 cited

Star-Planet Interactions in the Radio Domain: Prospect for Their Detection

Philippe Zarka

All types of interaction of a magnetized plasma flow with an obstacle (magnetized or not) are considered, and those susceptible to produce a radio signature are identified. The rol…

astro-ph.EP2024★ 11 cited

A patchy CO exosphere on Ganymede revealed by the James Webb Space Telescope

Dominique Bockelée-Morvan, Olivier Poch, Françcois Leblanc +25

Jupiter's icy moon Ganymede has a tenuous exosphere produced by sputtering and possibly sublimation of water ice. To date, only atomic hydrogen and oxygen have been directly detect…

astro-ph.EP2024★ 35 cited

Formation and evolution of a protoplanetary disk: combining observations, simulations and cosmochemical constraints

Alessandro Morbidelli, Yves Marrocchi, Adnan Ali Ahmad +12

We present a plausible and coherent view of the evolution of the protosolar disk that is consistent with the cosmochemical constraints and compatible with observations of other pro…

astro-ph.EP2024★ 4 cited

TOI-3568 b: a super-Neptune in the sub-Jovian desert

E. Martioli, R. P. Petrucci, E. Jofre +42

The sub-Jovian desert is a region in the mass-period and radius-period parameter space, typically encompassing short-period ranges between super-Earths and hot Jupiters, that exhib…

astro-ph.EP2024

Panopticon: a novel deep learning model to detect single transit events with no prior data filtering in PLATO light curves

H. G. Vivien, M. Deleuil, N. Jannsen +4

To prepare for the analyses of the future PLATO light curves, we develop a deep learning model, Panopticon, to detect transits in high precision photometric light curves. Since PLA…

astro-ph.EP2024★ 6 cited

Storms and convection on Uranus and Neptune: impact of methane abundance revealed by a 3D cloud-resolving model

Noé Clément, Jérémy Leconte, Aymeric Spiga +8

Uranus and Neptune have atmospheres dominated by molecular hydrogen and helium. In the upper troposphere, methane is the third main molecule and condenses, yielding a vertical grad…