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HABITABLE ZONES AROUND MAIN-SEQUENCE STARS: NEW ESTIMATES
- R. Kopparapu, R. Ramirez, R. Deshpande
- Physics, Geology
- 28 January 2013
Identifying terrestrial planets in the habitable zones (HZs) of other stars is one of the primary goals of ongoing radial velocity (RV) and transit exoplanet surveys and proposed future space…
HABITABLE ZONES AROUND MAIN-SEQUENCE STARS: DEPENDENCE ON PLANETARY MASS
- R. Kopparapu, R. Ramirez, J. Schottelkotte, J. Kasting, S. Domagal‐Goldman, V. Eymet
- Physics, Geology
- 21 April 2014
The ongoing discoveries of extra-solar planets are unveiling a wide range of terrestrial mass (size) planets around their host stars. In this Letter, we present estimates of habitable zones (HZs)…
Warming early Mars with CO 2 and H 2
- R. Ramirez, R. Kopparapu, M. Zugger, T. Robinson, R. Freedman, J. Kasting
- Physics, Geology
- 26 May 2014
Ancient valleys suggest a warm early Mars where liquid water flowed, but a greenhouse effect strong enough to offset a dim early Sun has been difficult to explain. Climate simulations suggest that…
ERRATUM: “HABITABLE ZONES AROUND MAIN-SEQUENCE STARS: NEW ESTIMATES” (2013, ApJ, 765, 131)
- R. Kopparapu, R. Ramirez, R. Deshpande
- Physics, Geology
- 24 May 2013
Ravi Kumar Kopparapu1,2,3,8, Ramses Ramirez1,2,3,8, James F. Kasting1,2,3,8, Vincent Eymet4, Tyler D. Robinson5,6,9, Suvrath Mahadevan3,6, Ryan C. Terrien3,6, Shawn Domagal-Goldman7,8, Victoria…
The geological and climatological case for a warmer and wetter early Mars
- R. Ramirez, R. Craddock
- Environmental Science, GeographyNature Geoscience
- 1 April 2018
The climate of early Mars remains a topic of intense debate. Ancient terrains preserve landscapes consistent with stream channels, lake basins and possibly even oceans, and thus the presence of…
THE HABITABLE ZONES OF PRE-MAIN-SEQUENCE STARS
- R. Ramirez, L. Kaltenegger
- Physics, Geology
- 4 December 2014
We calculate the pre-main-sequence habitable zone (HZ) for stars of spectral classes F–M. The spatial distribution of liquid water and its change during the pre-main-sequence phase of protoplanetary…
Can increased atmospheric CO2 levels trigger a runaway greenhouse?
- R. Ramirez, R. Kopparapu, Valerie Lindner, J. Kasting
- Environmental ScienceAstrobiology
- 7 August 2014
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A warmer and wetter solution for early Mars and the challenges with transient warming
- R. Ramirez
- Environmental Science
- 27 June 2017
A More Comprehensive Habitable Zone for Finding Life on Other Planets
- R. Ramirez
- Physics, GeologyGeosciences
- 25 July 2018
The habitable zone (HZ) is the circular region around a star(s) where standing bodies of water could exist on the surface of a rocky planet. Space missions employ the HZ to select promising targets…
Remote life-detection criteria, habitable zone boundaries, and the frequency of Earth-like planets around M and late K stars
- J. Kasting, R. Kopparapu, R. Ramirez, C. Harman
- Physics, GeologyProceedings of the National Academy of Sciences
- 25 November 2013
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