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19962026
Showing 2023 · astro-ph.EPShow all

7 papers · 2 filters

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★ 11 cited

Fully fluorinated non-carbon compounds NF3 and SF6 as ideal technosignature gases

Sara Seager, Janusz J. Petkowski, Jingcheng Huang +3

Waste gas products from technological civilizations may accumulate in an exoplanet atmosphere to detectable levels. We propose nitrogen trifluoride (NF3) and sulfur hexafluoride (S…

astro-ph.EP2023★ 6 cited

An extended low-density atmosphere around the Jupiter-sized planet WASP-193 b

Khalid Barkaoui, Francisco J. Pozuelos, Coel Hellier +32

Gas giants transiting bright nearby stars provide crucial insights into planetary system formation and evolution mechanisms. Most of these planets exhibit certain average character…

astro-ph.EP2023★ 21 cited

Venus' Atmospheric Chemistry and Cloud Characteristics Are Compatible with Venusian Life

William Bains, Janusz J. Petkowski, Sara Seager

Venus is Earth's sister planet, with similar mass and density but an uninhabitably hot surface, an atmosphere with a water activity 50-100 times lower than anywhere on Earths' surf…

astro-ph.EP2023★ 3 cited

Splitting of Long-Period Comet C/2018 F4 (PANSTARRS)

Man-To Hui, Michael S. P. Kelley, Denise Hung +4

Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its inner region in 2020 September, suggestive of a splitting event. We here present analyses of our obser…

astro-ph.EP2023★ 10 cited

Large Uncertainties in the Thermodynamics of Phosphorus (III) Oxide (PO) Have Significant Implications for Phosphorus Species in Planetary Atmospheres

William Bains, Matthew A. Pasek, Sukrit Ranjan +3

Phosphorus (III) oxide (PO) has been suggested to be a major component of the gas phase phosphorus chemistry in the atmospheres of gas giant planets and of Venus. However,…

astro-ph.EP2023★ 164 cited

Orbital Period Change of Dimorphos Due to the DART Kinetic Impact

Cristina A. Thomas, Shantanu P. Naidu, Peter Scheirich +46

The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, the secondary of…