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5 papers · 2 filters
Testing the Early Mars H2-CO2 Greenhouse Hypothesis with a 1-D Photochemical Model
Natasha Batalha, Shawn D. Domagal-Goldman, Ramses Ramirez +1
A recent study by Ramirez et al. (2014) demonstrated that an atmosphere with 1.3-4 bar of CO2 and H2O, in addition to 5-20% H2, could have raised the mean annual and global surface…
UV Surface Environment of Earth-like Planets Orbiting FGKM Stars Through Geological Evolution
S. Rugheimer, A. Segura, L. Kaltenegger +1
The UV environment of a host star affects the photochemistry in the atmosphere, and ultimately the surface UV environment for terrestrial planets and therefore the conditions for t…
Stability of rings around a triaxial primary
Antoine Lehébel, Matthew S. Tiscareno
Generally, the oblateness of a planet or moon is what causes rings to settle into its equatorial plane. However, the recent suggestion that a ring system might exist (or have exist…
A nearby M star with three transiting super-Earths discovered by K2
Ian J. M. Crossfield, Erik Petigura, Joshua Schlieder +24
Small, cool planets represent the typical end-products of planetary formation. Studying the archi- tectures of these systems, measuring planet masses and radii, and observing these…
Orbital instability of close-in exomoons in non-coplanar systems
Yu-Cian Hong, Matthew S. Tiscareno, Philip D. Nicholson +1
This work shows the dynamical instability that can happen to close-in satellites when planet oblateness is not accounted for in non-coplanar multiplanet systems. Simulations includ…