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19912026
Showing 2023 · astro-ph.EPShow all

83 papers · 2 filters

astro-ph.EP2023★ 19 cited

Planetary Radio Interferometry and Doppler Experiment (PRIDE) of the JUICE mission

Leonid I. Gurvits, Giuseppe Cimo, Dominic Dirkx +20

Planetary Radio Interferometry and Doppler Experiment (PRIDE) is a multi-purpose experimental technique aimed at enhancing the science return of planetary missions. The technique e…

astro-ph.EP2023★ 4 cited

The enigmatic abundance of atomic hydrogen in Saturn's upper atmosphere

Lotfi Ben-Jaffel, Julie Moses, Robert A. West +5

A planet's Lyman-α (Lyα) emission is sensitive to its thermospheric structure. Here, we report joint Hubble Space Telescope (HST) and Cassini cross-calibration observations of the…

astro-ph.EP2023★ 12 cited

Strong resemblance between surface and deep zonal winds inside Jupiter revealed by high-degree gravity moments

Hao Cao, Jeremy Bloxham, Ryan S. Park +5

Jupiter's atmosphere-interior is a coupled fluid dynamical system strongly influenced by the rapid background rotation. While the visible atmosphere features east-west zonal winds…

astro-ph.EP2023★ 7 cited

Cliff collapse on Comet 67P/Churyumov-Gerasimenko -- I. Aswan

Björn J. R. Davidsson

The Aswan cliff on Comet 67P/Churyumov-Gerasimenko collapsed on 2015 July 10. Thereby, relatively pristine comet material from a depth of ~12 m was exposed at the surface. Observat…

astro-ph.EP2023★ 3 cited

CHIMERA Occultation Constraints on the Abundance of Kilometer-scale Kuiper Belt Objects

Qicheng Zhang, Gregg W. Hallinan, Navtej S. Saini +3

Occultations provide indirect sensitivity to the number density of small Kuiper Belt objects (KBOs) too faint to directly detect telescopically. We present results from the Caltech…

astro-ph.EP2023★ 12 cited

TOI-5344 b: A Saturn-like planet orbiting a super-Solar metallicity M0 dwarf

Te Han, Paul Robertson, Shubham Kanodia +19

We confirm the planetary nature of TOI-5344 b as a transiting giant exoplanet around an M0 dwarf star. TOI-5344 b was discovered with the Transiting Exoplanet Survey Satellite phot…

astro-ph.EP2023★ 1 cited

Revisiting Eridani with NEID: Identifying New Activity-Sensitive Lines in a Young K Dwarf Star

Sarah Jiang, Arpita Roy, Samuel Halverson +7

Recent improvements in the sensitivity and precision of the radial velocity (RV) method for exoplanets have brought it close, but not quite to, the threshold (10 cm/s) requir…

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★ 1 cited

Io's polar volcanic thermal emission indicative of magma ocean and shallow tidal heating models

Ashley Gerard Davies, Jason Perry, David A. Williams +1

The distribution of Io's volcanic activity likely reflects the position and magnitude of internal tidal heating. We use new observations of Io's polar regions by the Juno spacecraf…

astro-ph.EP2023★ 2 cited

Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks

Theodore Kareta, Cristina Thomas, Jian-Yang Li +85

The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results fr…

astro-ph.EP2023★ 4 cited

Experimental Investigation of the Photochemical Production of Hydrocarbons in Warm Gas Giant Exoplanet Atmospheres

Benjamin Fleury, Yves Benilan, Olivia Venot +3

In warm (equilibrium temperature <1000 K) gas giant exoplanet atmospheres, the observation of trace species in abundances deviating from thermochemical equilibrium predictions coul…

astro-ph.EP2023★ 15 cited

Euclid: Identification of asteroid streaks in simulated images using deep learning

M. Pöntinen, M. Granvik, A. A. Nucita +114

Up to 150000 asteroids will be visible in the images of the ESA Euclid space telescope, and the instruments of Euclid offer multiband visual to near-infrared photometry and slitles…

astro-ph.EP2023★ 8 cited

Seasonally Varying Outgassing as an Explanation for Dark Comet Accelerations

Aster G. Taylor, Davide Farnocchia, David Vokrouhlicky +3

Significant nonradial, nongravitational accelerations with magnitudes incompatible with radiation-driven effects have been reported in seven small, photometrically inactive near-Ea…

astro-ph.EP2023★ 36 cited

A roadmap for the atmospheric characterization of terrestrial exoplanets with JWST

TRAPPIST-1 JWST Community Initiative, :, Julien de Wit +80

Ultra-cool dwarf stars are abundant, long-lived, and uniquely suited to enable the atmospheric study of transiting terrestrial companions with JWST. Amongst them, the most prominen…

astro-ph.EP2023★ 17 cited

The Hera Radio Science Experiment at Didymos

Edoardo Gramigna, Riccardo Lasagni Manghi, Marco Zannoni +7

Hera represents the European Space Agency's inaugural planetary defense space mission and plays a pivotal role in the Asteroid Impact and Deflection Assessment international collab…

astro-ph.EP2023★ 3 cited

The first scattered light images of HD 112810, a faint debris disk in the Sco-Cen association

Elisabeth C. Matthews, Mickaël Bonnefoy, Chen Xie +17

Context: Circumstellar debris disks provide insight into the formation and early evolution of planetary systems. Resolved belts in particular help to locate planetesimals in exosys…

astro-ph.EP2023★ 11 cited

Impact of M-dwarf Stellar Wind and Photoevaporation on the Atmospheric Evolution of Small Planets

Ashini Modi, Raissa Estrela, Adriana Valio

The evolution of a planet's atmosphere depends strongly on its host star's properties. When their host stars are younger, planets can experience stronger winds and EUV emissions. T…

astro-ph.EP2023★ 5 cited

Collisional heating of icy planetesimals. I. Catastrophic collisions

Björn J. R. Davidsson

Planetesimals in the primordial disc may have experienced a collisional cascade. If so, the comet nuclei later placed in the Kuiper belt, scattered disc, and Oort Cloud would prima…

astro-ph.EP2023★ 12 cited

Thermal properties of the leading hemisphere of Callisto inferred from ALMA observations

Maria Camarca, Katherine de Kleer, Bryan Butler +5

We present a thermal observation of Callisto's leading hemisphere obtained using the Atacama Large Millimeter/submillimeter Array (ALMA) at 0.87 mm (343 GHz). The angular resolutio…

astro-ph.EP2023★ 10 cited

Spectral determination of the colour and vertical structure of dark spots in Neptune's atmosphere

Patrick G. J. Irwin, Jack Dobinson, Arjuna James. Michael H. Wong +12

Previous observations of dark vortices in Neptune's atmosphere, such as Voyager-2's Great Dark Spot, have been made in only a few, broad-wavelength channels, which has hampered eff…

astro-ph.EP2023★ 20 cited

Transit Timing Variations in the three-planet system: TOI-270

Laurel Kaye, Shreyas Vissapragada, Maximilian N. Gunther +69

We present ground and space-based photometric observations of TOI-270 (L231-32), a system of three transiting planets consisting of one super-Earth and two sub-Neptunes discovered…

astro-ph.EP2023★ 19 cited

Large Interferometer For Exoplanets (LIFE). X. Detectability of currently known exoplanets and synergies with future IR/O/UV reflected-starlight imaging missions

Óscar Carrión-González, Jens Kammerer, Daniel Angerhausen +10

The next generation of space-based observatories will characterize the atmospheres of low-mass, temperate exoplanets with the direct-imaging technique. This will be a major step fo…

astro-ph.EP2023★ 14 cited

Reflected spectroscopy of small exoplanets III: probing the UV band to measure biosignature gasses

Mario Damiano, Renyu Hu, Bertrand Mennesson

Direct-imaging observations of terrestrial exoplanets will enable their atmospheric characterization and habitability assessment. Considering the Earth, the key atmospheric signatu…

astro-ph.EP2023★ 23 cited

Investigating the visible phase-curve variability of 55 Cnc e

E. A. Meier Valdés, B. M. Morris, B. -O. Demory +87

55 Cnc e is an ultra-short period super-Earth transiting a Sun-like star. Previous observations in the optical range detected a time-variable flux modulation that is phased with th…