1.6k citations · 6k across the 30 of their papers we have counts for
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astro-ph.EP2014★ 299 cited
Warming early Mars with CO2 and H2
Ramses M. Ramirez, Ravi Kopparapu, Michael E. Zugger +3
The presence of valleys on ancient terrains of Mars suggest that liquid water flowed on the martian surface 3.8 billion years ago or before. The above-freezing temperatures require…
astro-ph.EP2014★ 675 cited
Habitable Zones Around Main-Sequence Stars: Dependence on Planetary Mass
Ravi kumar Kopparapu, Ramses M. Ramirez, James SchottelKotte +3
The ongoing discoveries of extrasolar planets are unveiling a wide range of terrestrial mass (size) planets around their host stars. In this letter, we present estimates of habitab…