output
19952026
most citedThe Apache Point Observatory Galactic Evolution Experiment (APOGEE)

1.8k citations

Showing astro-ph.EPShow all

215 papers · 1 filter

astro-ph.EP2026★ 1 cited

Discovery of a second-generation planet candidate accreting onto a white dwarf

Jamie T. Williams, Boris T. Gänsicke, Nicholas C. Stone +10

Many white dwarfs accrete the debris of disrupted planetary bodies, detected in the form of metal-enrichment in their atmospheres, dusty or gaseous circumstellar discs, and photome…

astro-ph.EP2026

Comparing Monte Carlo Models of Impact Alteration of Planetary Atmospheres

MIkayla R. Huffman, David A. Brain, Kelsi N. Singer +2

One process that affects atmospheric surface pressure is impact bombardment. The evolution of a planet's atmosphere under impact bombardment is an open question. We use a Monte Car…

astro-ph.EP2026

Upper Limits on Planet-Induced GHz Radio Emission from Inactive M Dwarfs

Jackie Villadsen, Carter Russell, Luna Guerrero +9

Nearby short-period exoplanet systems may produce detectable stellar radio emission due to sub-Alfvénic star-planet interaction (SPI), but there are no confirmed cases yet. We targ…

astro-ph.EP2026

Maximum Lifetime of the Vegetative Biosphere

Jacob Haqq-Misra, Eric Wolf

We use a three-dimensional model to calculate steady-state climates at various intervals in Earth's future, across a parameter space of increasing insolation and decreasing CO…

astro-ph.EP2026

Stellar flare-driven evolution of primordial early exo-Earth atmospheres: Insights from a Young M Dwarf Flare model

E. Mamonova, K. Herbst, V. Kofman +4

Context. M dwarfs are key targets for terrestrial exoplanet studies, with prospects for atmospheric spectroscopy. However, strong stellar magnetic activity and frequent flaring req…

astro-ph.EP2026

Thermal Segregation and Reddening in Europa's Double Ridges

Kya C. Sorli, Paul O. Hayne, Lucas Lange +1

Europa's double ridges often display lower albedo and redder color than their surroundings. Their unique topography may cause sublimation-driven darkening due to illumination and s…

astro-ph.EP2026

Disentangling auroral, cloud and magnetic spot driven variability in three early L-dwarfs with HST/WFC3

C. O'Toole, J. M. Vos, E. N. Nasedkin +5

Variability monitoring provides an unparalleled insight into the atmospheric processes of brown dwarfs and directly imaged exo-planets. Inhomogeneous clouds, aurorae and magnetic s…

astro-ph.EP2026

The Effect of Planetary Rotation Period on Clouds in a Global Climate Model with a Bin Microphysics Scheme

Huanzhou Yang, Eric T. Wolf, Cheng-Cheng Liu +3

Clouds are the largest source of uncertainty in climate simulations. For exoplanets, cloud simulation is particularly challenging because of the lack of observational data to tune…

astro-ph.EP2025★ 2 cited

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★ 2 cited

Magnetohydrodynamic simulation assessment of a potential near-ultraviolet early ingress in WASP-189b

Y. Duann, S. -H. Lai, H. J. Hoeijmakers +8

Ultra-hot Jupiters (UHJs) in close orbits around early-type stars provide natural laboratories for studying atmospheric escape and star-planet interactions under extreme irradiatio…

astro-ph.EP2025

Chemistry, Climate, and Transmission Spectra of TRAPPIST-1 e Explored with a Multimodel Sparse Sampled Ensemble

Eric T. Wolf, Edward W. Schwieterman, Jacob Haqq-Misra +6

TRAPPIST-1 e is one of a few habitable zone exoplanets that is amenable to characterization in the near term. In this study our motivations are both scientific and technical. Our t…

astro-ph.EP2025★ 2 cited

Diurnal temperature variations and migrating thermal tides in the Martian lower atmosphere observed by the Emirates Mars InfraRed Spectrometer

Siteng Fan, François Forget, Michael D. Smith +12

The Martian atmosphere experiences large diurnal variations due to the ~24.6 h planetary rotation and its low heat capacity. Understanding such variations on a planetary scale is l…

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★ 1 cited

A 3D thermophysical model for binary asteroid systems: Application to the BYORP effect on (175706) 1996 FG3

Kya C. Sorli, Paul O. Hayne, Rachel H. Cueva +3

Differential heating and radiation on asymmetric asteroids can cause measurable changes in their rotation rates and spin axes, known as the YORP effect. In binary systems, such rad…

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…

astro-ph.EP2025★ 5 cited

The SPACE Program. I. The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends

K. Angelique Kahle, Jasmina Blecic, Reza Ashtari +26

Sub-Neptune exoplanets are the most abundant type of planet known today. As they do not have a Solar System counterpart, many open questions exist about their composition and forma…

astro-ph.EP2025★ 3 cited

Orbit, meteoroid size, and cosmic ray exposure history of the Aguas Zarcas CM2 breccia

Peter Jenniskens, Gerardo J. Soto, Gabriel Goncalves Silva +21

The Aguas Zarcas (Costa Rica) CM2 carbonaceous chondrite fell during night time in April 2019. Security and dashboard camera video of the meteor were analyzed to provide a trajecto…

astro-ph.EP2025★ 4 cited

A One-Dimensional Energy Balance Model Parameterization for the Formation of CO2 Ice on the Surfaces of Eccentric Extrasolar Planets

Vidya Venkatesan, Aomawa L. Shields, Russell Deitrick +30

Eccentric planets may spend a significant portion of their orbits at large distances from their host stars, where low temperatures can cause atmospheric CO2 to condense out onto th…

astro-ph.EP2024★ 15 cited

Two Distinct Populations of Dark Comets Delineated by Orbits and Sizes

Darryl Z. Seligman, Davide Farnocchia, Marco Micheli +7

Small bodies are capable of delivering essential prerequisites for the development of life, such as volatiles and organics, to the terrestrial planets. For example, empirical evide…

astro-ph.EP2024★ 34 cited

A giant planet transiting a 3-Myr protostar with a misaligned disk

Madyson G. Barber, Andrew W. Mann, Andrew Vanderburg +35

Astronomers have found more than a dozen planets transiting 10-40 million year old stars, but even younger transiting planets have remained elusive. A possible reason for the lack…

astro-ph.EP2024★ 15 cited

High-energy spectra of LTT 1445A and GJ 486 reveal flares and activity

H. Diamond-Lowe, G. W. King, A. Youngblood +19

The high-energy radiative output, from the X-ray to the ultraviolet, of exoplanet host stars drives photochemical reactions and mass loss in the upper regions of planetary atmosphe…

astro-ph.EP2024★ 62 cited

A Benchmark JWST Near-Infrared Spectrum for the Exoplanet WASP-39b

A. L. Carter, E. M. May, N. Espinoza +77

Observing exoplanets through transmission spectroscopy supplies detailed information on their atmospheric composition, physics, and chemistry. Prior to JWST, these observations wer…

astro-ph.EP2024★ 96 cited

Sulphur dioxide in the mid-infrared transmission spectrum of WASP-39b

Diana Powell, Adina D. Feinstein, Elspeth K. H. Lee +70

The recent inference of sulphur dioxide (SO) in the atmosphere of the hot (1100 K), Saturn-mass exoplanet WASP-39b from near-infrared JWST observations suggests that phot…

astro-ph.EP2024★ 5 cited

Energetic proton losses reveal Io's extended and longitudinally asymmetrical atmosphere

H. L. F. Huybrighs, C. P. A. van Buchem, A. Blöcker +3

Along the I24, I27 and I31 flybys of Io (1999-2001), the Energetic Particle Detector (EPD) onboard the Galileo spacecraft observed localised regions of energetic protons losses (15…