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19912026
Showing 2025 · astro-ph.EPShow all

55 papers · 2 filters

astro-ph.EP2025★ 2 cited

Lunar Dust: Formation, Microphysics, and Transport

Slava G. Turyshev

Lunar dust -- the sub-millimeter fraction of the regolith -- controls the optical, thermophysical, electrical, mechanical, and environmental behavior of the Moon's surface. These p…

astro-ph.EP2025★ 2 cited

The Flying Saucer edge-on disc's Near Infrared silhouette revealed by the JWST JEDIce program

Emmanuel Dartois, Jennifer A. Noble, Jennifer B. Bergner +17

Edge-on discs offer a unique opportunity to probe radial and vertical dust and gas distributions in the protoplanetary phase. This study aims to investigate the distribution of mic…

astro-ph.EP2025★ 2 cited

PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-Resolution Phased-Resolved Spectroscopy of The Ultra Hot Jupiter KELT-20 b

Victoria Bonidie, Marshall C. Johnson, Ji Wang +7

We present five datasets of high-resolution optical emission spectra of the ultra-hot Jupiter KELT-20 b with the PEPSI spectrograph. Using a Bayesian retrieval framework, we constr…

astro-ph.EP2025★ 2 cited

Dust back-reaction on gas around planets modifies the cold thermal torque

Raúl O. Chametla, Ondřej Chrenko, F. J. Sánchez-Salcedo +7

A nascent planet in a gas disk experiences radial migration due to the different torques which act on it. It has recently been shown that the torques produced by the gas and dust d…

astro-ph.EP2025★ 4 cited

The HITRAN2024 methane update

T. Bertin, I. E. Gordon, R. J. Hargreaves +22

Spectroscopic parameters of methane from many different studies were gathered to improve the HITRAN database towards its 2024 version. After a validation process using high-resolut…

astro-ph.EP2025★ 3 cited

JWST/MIRI Imaging of the Warm Dust Component of the Epsilon Eridani Debris Disk

Schuyler G. Wolff, András Gáspár, George Rieke +4

We present JWST/MIRI observations of the debris disk surrounding the nearby, solar analog Epsilon Eridani obtained as part of the Archetypal Debris Disk GTO program. Multi-waveleng…

astro-ph.EP2025

An Hα Transit of HD 189733b to Assess Stellar Activity Across the Transit Chord Close to JWST Observations

Kingsley E. Ehrich, Jason A. Dittmann, Samuel P. Halverson +1

Transmission spectroscopy allows us to detect molecules in planetary atmospheres, but is subject to contamination from inhomogeneities on the stellar surface. Quantifying the exten…

astro-ph.EP2025

Surprise non-detection of Upsilon Andromedae b with MIRC-X and MYSTIC at the CHARA Array

Tyler Gardner, John D. Monnier, Stefan Kraus +11

Ground-based long baseline interferometry is a powerful tool for characterizing exoplanets which are too close to their host star to be imaged with single-dish telescopes. The CHAR…

astro-ph.EP2025

Evaluating Habitability and Biosignature Detection on TOI-700 d: The Role of UV Environment and Atmospheric Pressure

Viktor Y. D. Sumida, Raissa Estrela, Adriana Valio

M dwarfs have long been prime targets in the search for habitable exoplanets, owing to their abundance in the galaxy and the relative ease of detecting Earth-sized worlds within th…

astro-ph.EP2025★ 3 cited

Spectral Mixture Modeling with Laboratory Near-Infrared Data I: Insights into Compositional Analysis of Europa

A. Emran

Europa's surface composition and physical characteristics are commonly constrained using spectral deconvolution through linear mixture (LM) modeling and radiative transfer-based (R…

astro-ph.EP2025★ 3 cited

Survival of satellites during the migration of a Hot Jupiter

Emeline Bolmont, Edward Galantay, Sergi Blanco-Cuaresma +2

We investigate the origin and stability of extrasolar satellites orbiting close-in gas giants, focusing on whether these satellites can survive planetary migration within a protopl…

astro-ph.EP2025

Modeling the formation of N2 and CH4 frost on Pluto's slopes

L. Lange, T. Bertrand, V. Belissa +3

Context. The equatorial region of Cthulhu as revealed by New Horizons appears to be generally dark and largely devoid of volatiles because its surface albedo is low. Localized brig…

astro-ph.EP2025★ 12 cited

Silicate Precursor Silane detected in Cold Low-Metallicity Brown Dwarf

Jacqueline K. Faherty, Aaron M. Meisner, Ben Burningham +28

Within 20 pc of the Sun there are currently 29 known cold brown dwarfs, sources with measured distances and an estimated effective temperature between that of Jupiter (170K) and ~5…

astro-ph.EP2025★ 14 cited

Catastrophic disruption of asteroid 2023 CX1 and implications for planetary defense

Auriane Egal, Denis Vida, François Colas +94

Mitigation of the threat from airbursting asteroids requires an understanding of the potential risk they pose for the ground. How asteroids release their kinetic energy in the atmo…

astro-ph.EP2025★ 2 cited

YSES 2b is a background star: Differential astrometric M-dwarf measurements in time

Matthew Kenworthy, Tomas Stolker, Jens Kammerer +13

We wish to confirm the nature of YSES 2b, a purportedly faint companion of the young star YSES 2. We used on-sky observations from SPHERE and GRAVITY to measure the astrometric pos…

astro-ph.EP2025★ 3 cited

Quantitative Evaluation of the delta-Eddington, Hapke, and Shkuratov Models for Predicting the Albedo and Inferring the Grain Radius of Ice

Aditya R. Khuller, Al Emran

Determining the physical properties of ices across the solar system is essential for understanding the surface dynamics, volatile transport, and climate evolution on ice-covered pl…

astro-ph.EP2025

Atmospheric CO2 Ice in the Martian Polar Regions: Physical and Spectral Properties From Mars Climate Sounder Observations

R. W. Stevens, P. O. Hayne, A. Kleinböhl +1

ice clouds are important for polar energy balance and the carbon dioxide cycle on Mars. However, uncertainties remain regarding their physical and radiative…

astro-ph.EP2025★ 3 cited

Cislunar Resonant Transport and Heteroclinic Pathways: From 3:1 to 2:1 to L1

Bhanu Kumar, Anjali Rawat, Aaron J. Rosengren +1

Understanding the dynamical structure of cislunar space beyond geosynchronous orbit is critical for both lunar exploration and for high-Earth-orbiting trajectories. In this study,…

astro-ph.EP2025★ 3 cited

HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen

Nathalie K. Jones, Jason J. Wang, Eric L. Nielsen +51

We present confirmation of HD 143811 AB b, a substellar companion to spectroscopic binary HD 143811 AB through direct imaging with the Gemini Planet Imager (GPI) and Keck NIRC2. HD…

astro-ph.EP2025

Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b

Anne E. Peck, William Roberson, Eric L. Nielsen +50

HD~143811~AB is the host star to the directly imaged planet HD~143811~AB~b, which was recently discovered using data from the Gemini Planet Imager and Keck NIRC2. A member of the S…

astro-ph.EP2025

Isotopic composition of cometary water and the origin of Earth's oceans

Dariusz C. Lis, Martin Cordiner, Nicolas Biver +4

Studies of the water content and isotopic composition of water-rich asteroids and comets are of key interest for understanding the late accretion stage of the Solar System cometary…

astro-ph.EP2025★ 33 cited

WIde Separation Planets In Time (WISPIT): A Gap-clearing Planet in a Multi-ringed Disk around the Young Solar-type Star WISPIT 2

Richelle F. van Capelleveen, Christian Ginski, Matthew A. Kenworthy +17

In the past decades several thousand exoplanet systems have been discovered around evolved, main-sequence stars, revealing a wide diversity in their architectures. To understand ho…

astro-ph.EP2025★ 5 cited

WIde Separation Planets In Time (WISPIT): Two directly imaged exoplanets around the Sun-like stellar binary WISPIT 1

Richelle F. van Capelleveen, Matthew A. Kenworthy, Christian Ginski +7

Wide separation gas giant planets present a challenge to current planet formation theories, and the detection and characterisation of these systems enables us to constrain their fo…

astro-ph.EP2025★ 1 cited

Replicating the flyby sampling of salty ocean world ice grains using impact ionization mass spectrometry

K. Marshall Seaton, Bryana L. Henderson, Sascha Kempf +4

The Europa Clipper mission will arrive at the Jovian system in 2030 and analyze ice grains sourced from the icy material on its surface using impact mass spectrometry, which will p…