Showing 2023 · astro-ph.EPShow all

18 papers · 2 filters

astro-ph.EP2023★ 43 cited

15NH3 in the atmosphere of a cool brown dwarf

David Barrado, Paul Mollière, Polychronis Patapis +40

Brown dwarfs serve as ideal laboratories for studying the atmospheres of giant exoplanets on wide orbits as the governing physical and chemical processes in them are nearly identic…

astro-ph.EP2023★ 128 cited

SO2, silicate clouds, but no CH4 detected in a warm Neptune

Achrene Dyrek, Michiel Min, Leen Decin +44

WASP-107b is a warm (~740 K) transiting planet with a Neptune-like mass of ~30.5 Earth masses and Jupiter-like radius of ~0.94 Jupiter radius, whose extended atmosphere is eroding.…

astro-ph.EP2023★ 3 cited

Constraining the formation history of the HAT-P-11 system by atmospheric abundances

Lena Chatziastros, Bertram Bitsch, Aaron David Schneider

The chemical fingerprint of a planet reveals information about its formation history regarding when and where it formed. The water content of a planet can help to constrain its for…

astro-ph.EP2023★ 31 cited

Imaging detection of the inner dust belt and the four exoplanets in the HR8799 system with JWST's MIRI coronagraph

Boccaletti A., Mâlin M., Baudoz P. +35

The multi planet system HR8799 is the first target observed with MIRI's coronagraphs as part of the MIRI-EC Guaranteed Time Observations exoplanets programme in Nov. 2022. We obtai…

astro-ph.EP2023★ 12 cited

Photodissociation and induced chemical asymmetries on ultra-hot gas giants. A case study of HCN on WASP-76 b

Robin Baeyens, Jean-Michel Désert, Annemieke Petrignani +2

Recent observations have resulted in the detection of chemical gradients on ultra-hot gas giants. Notwithstanding their high temperature, chemical reactions in ultra-hot atmosphere…

astro-ph.EP2023★ 4 cited

Infrared spectra of TiO2 clusters for hot Jupiter atmospheres

J. P. Sindel, Ch. Helling, D. Gobrecht +2

Context. Clouds seem unavoidable in cool and dense environments, and hence, are necessary to explain observations of exoplanet atmospheres, most recently of WASP 96b with JWST. Und…

astro-ph.EP2023★ 49 cited

The Chemical Inventory of the Inner Regions of Planet-forming Disks -- The JWST/MINDS Program

Inga Kamp, Thomas Henning, Aditya M. Arabhavi +40

The understanding of planet formation has changed recently, embracing the new idea of pebble accretion. This means that the influx of pebbles from the outer regions of planet-formi…

astro-ph.EP2023★ 100 cited

Water in the terrestrial planet-forming zone of the PDS 70 disk

G. Perotti, V. Christiaens, Th. Henning +42

Terrestrial and sub-Neptune planets are expected to form in the inner (AU) regions of protoplanetary disks. Water plays a key role in their formation, although it is yet uncl…

astro-ph.EP2023★ 66 cited

MINDS. Abundant water and varying C/O across the disk of Sz 98 as seen by JWST/MIRI

Danny Gasman, Ewine F. van Dishoeck, Sierra L. Grant +41

MIRI/MRS on board the JWST allows us to probe the inner regions of protoplanetary disks. Here we examine the disk around the classical T Tauri star Sz 98, which has an unusually la…

astro-ph.EP2023★ 11 cited

Evidence of Radius Inflation in Radiative GCM Models of WASP-76b due to the Advection of Potential Temperature

Felix Sainsbury-Martinez, Pascal Tremblin, Aaron David Schneider +6

Understanding the discrepancy between the radii of observed hot Jupiters and standard 'radiative-convective' models remains a hotly debated topic in the exoplanet community. One me…

astro-ph.EP2023★ 17 cited

Stratospheric dayside-to-nightside circulation drives the 3-D ozone distribution on synchronously rotating rocky exoplanets

Marrick Braam, Paul I. Palmer, Leen Decin +2

Determining the habitability and interpreting future atmospheric observations of exoplanets requires understanding the atmospheric dynamics and chemistry from a 3-D perspective. Pr…

astro-ph.EP2023★ 3 cited

An irradiated-Jupiter analogue hotter than the Sun

Na'ama Hallakoun, Dan Maoz, Alina G. Istrate +10

Planets orbiting close to hot stars experience intense extreme-ultraviolet radiation, potentially leading to atmosphere evaporation and to thermal dissociation of molecules. Howeve…

astro-ph.EP2023★ 8 cited

Three-dimensional orbit of AC Her determined: Binary-induced truncation cannot explain the large cavity in this post-AGB transition disk

Narsireddy Anugu, Jacques Kluska, Tyler Gardner +17

Some evolved binaries, namely post-asymptotic giant branch binaries, are surrounded by stable and massive circumbinary disks similar to protoplanetary disks found around young star…

astro-ph.EP2023★ 16 cited

uGMRT observations of the hot-Saturn WASP 69b: Radio-Loud Exoplanet-Exomoon Survey II (RLEES II)

Mayank Narang, Apurva V. Oza, Kaustubh Hakim +7

Exomoons have so far eluded ongoing searches. Several studies have exploited transit and transit timing variations and high-resolution spectroscopy to identify potential exomoon ca…

astro-ph.EP2023★ 20 cited

Large Interferometer For Exoplanets (LIFE): IX. Assessing the Impact of Clouds on Atmospheric Retrievals at Mid-Infrared Wavelengths with a Venus-Twin Exoplanet

B. S. Konrad, E. Alei, S. P. Quanz +10

The Large Interferometer For Exoplanets (LIFE) initiative aims to develop a space based mid-infrared (MIR) nulling interferometer to measure the thermal emission spectra of tempera…

astro-ph.EP2023★ 96 cited

The CARMENES search for exoplanets around M dwarfs. Guaranteed time observations Data Release 1 (2016-2020)

I. Ribas, A. Reiners, M. Zechmeister +102

The CARMENES instrument was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability to search for temperate rocky planets around a sample of n…

astro-ph.EP2023★ 7 cited

The effect of thermal non-equilibrium on kinetic nucleation

Sven Kiefer, David Gobrecht, Leen Decin +1

Nucleation is considered to be the first step in dust and cloud formation in the atmospheres of asymptotic giant branch (AGB) stars, exoplanets, and brown dwarfs. In these environm…

astro-ph.EP2023★ 145 cited

A broadband thermal emission spectrum of the ultra-hot Jupiter WASP-18b

Louis-Philippe Coulombe, Björn Benneke, Ryan Challener +73

Close-in giant exoplanets with temperatures greater than 2,000 K (''ultra-hot Jupiters'') have been the subject of extensive efforts to determine their atmospheric properties using…