Results 61 to 70 of about 10,001 (169)
The Astrophysical Journal Letters, 2023 GJ 367 is a bright ( V ≈ 10.2) M1 V star that has been recently found to host a transiting ultra-short period sub-Earth on a 7.7 hr orbit. With the aim of improving the planetary mass and radius and unveiling the inner architecture of the system, we ...
Elisa Goffo +40 more
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Journal of Geophysical Research: Planets, Volume 129, Issue 3, March 2024.Abstract Toroidal atmospheres and exospheres characterized at exoplanets may be fueled by volcanically active exomoons, often referred to as exo‐Ios. We study the neutral outgassing and volatile evolution of a close‐orbiting, evaporating satellite at eight candidate exoplanet‐exomoon systems WASP‐49,‐96,‐69,‐17 b, XO‐2N b, HAT‐P‐1 b, HD‐189733 b, and ...
M. Meyer zu Westram, A. V. Oza, A. Galli
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The Planetary Science JournalTheoretical frameworks for reflection and emission spectroscopy of exoplanet surfaces are becoming increasingly important for the characterization of rocky exoplanets, especially with the rapid growth of the detected exoplanet population and ...
Leonardos Gkouvelis
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Mitigating Worst-case Exozodiacal Dust Structure in High-contrast Images of Earth-like Exoplanets
The Astronomical Journal, 2023 Detecting Earth-like exoplanets in direct images of nearby Sun-like systems brings a unique set of challenges that must be addressed in the early phases of designing a space-based direct imaging mission.
Miles H. Currie +4 more
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Early Results from the HUMDRUM Survey: A Small, Earth-mass Planet Orbits TOI-1450A
The Astronomical JournalM-dwarf stars provide us with an ideal opportunity to study nearby small planets. The HUnting for M Dwarf Rocky planets Using MAROON-X (HUMDRUM) survey uses the MAROON-X spectrograph, which is ideally suited to studying these stars, to measure precise ...
Madison Brady +25 more
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Photosynthesis in Hydrogen-Dominated Atmospheres
Life, 2014 The diversity of extrasolar planets discovered in the last decade shows that we should not be constrained to look for life in environments similar to early or present-day Earth.
William Bains, Sara Seager, Andras Zsom
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Small and Close-in Planets are Uncommon Around A-type Stars
The Astronomical JournalThe Kepler and K2 missions enabled robust calculations of planet occurrence rates around FGKM-type stars. However, these missions observed too few stars with earlier spectral types to tightly constrain the occurrence rates of planets orbiting hotter ...
Steven Giacalone, Courtney D. Dressing
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The Planetary Science JournalIn the late stage of terrestrial planet formation, planets are predicted to undergo pairwise collisions known as giant impacts. Here, we present a high-resolution database of giant impacts for differentiated colliding bodies of iron–silicate composition,
Alexandre Emsenhuber +6 more
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The Astrophysical JournalUnderstanding the surface temperature and interior structure of cold-to-temperate sub-Neptunes is critical for assessing their habitability, yet direct observations are challenging.
Ziyu Huang +7 more
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Mass–Radius Relationships and Contraction of Condensed Planets by Cooling or Despinning
The Astrophysical JournalCondensed planets contract or expand as their temperature changes. With the exception of the effect of phase changes, this phenomenon is generally interpreted as being solely related to the thermal expansivity of the planet’s components. However, changes
Yanick Ricard, Frédéric Chambat
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