Milankovitch Cycles for a Circumstellar Earth-analog within $\alpha$ Centauri-like Binaries [PDF]
, 2021 An Earth-analog orbiting within the habitable zone of α Centauri B was shown to undergo large variations in its obliquity, or axial tilt, which affects the planetary climate by altering the radiative flux for a given latitude.
B. Quarles, Gongjie Li, J. Lissauer
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A Methane Extension to the Classical Habitable Zone [PDF]
, 2018 The habitable zone (HZ) is the circumstellar region where standing bodies of liquid water could exist on the surface of a rocky planet. Conventional definitions assume that CO2 and H2O are the only greenhouse gases.
R. Ramirez, L. Kaltenegger
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The ice cap zone: a unique habitable zone for ocean worlds [PDF]
, 2018 Traditional definitions of the habitable zone assume that habitable planets contain a carbonate-silicate cycle that regulates CO2 between the atmosphere, surface, and the interior.
R. Ramirez, A. Levi
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STELLAR ACTIVITY MIMICS A HABITABLE-ZONE PLANET AROUND KAPTEYN’S STAR [PDF]
, 2015 Kapteyn’s star is an old M subdwarf believed to be a member of the Galactic halo population of stars. A recent study has claimed the existence of two super-Earth planets around the star based on radial velocity (RV) observations.
P. Robertson +6 more
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The habitable zone and extreme planetary orbits. [PDF]
Astrobiology, 2012 The habitable zone for a given star describes the range of circumstellar distances from the star within which a planet could have liquid water on its surface, which depends upon the stellar properties.
S. Kane, D. Gelino
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Evolution of the habitable zone of low-mass stars - Detailed stellar models and analytical relationships for different masses and chemical compositions [PDF]
, 2014 Context. The habitability of an exoplanet is assessed by determining the times at which its orbit lies in the circumstellar habita ble zone (HZ). This zone evolves with time following the stellar luminosity variation, which means that the time spent in ...
G. Valle +3 more
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STABILIZING CLOUD FEEDBACK DRAMATICALLY EXPANDS THE HABITABLE ZONE OF TIDALLY LOCKED PLANETS [PDF]
, 2013 The habitable zone (HZ) is the circumstellar region where a planet can sustain surface liquid water. Searching for terrestrial planets in the HZ of nearby stars is the stated goal of ongoing and planned extrasolar planet surveys.
Jun Yang, N. Cowan, D. Abbot
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Oscillations in the habitable zone around α Centauri B [PDF]
, 2012 The α Cen AB system is an attractive one for radial velocity observations to detect potential exoplanets. The high metallicity of both α Cen A and B suggests that they could have possessed circumstellar discs capable of forming planets.
D. Forgan
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55 CANCRI: STELLAR ASTROPHYSICAL PARAMETERS, A PLANET IN THE HABITABLE ZONE, AND IMPLICATIONS FOR THE RADIUS OF A TRANSITING SUPER-EARTH [PDF]
, 2011 The bright star 55 Cancri is known to host five planets, including a transiting super-Earth. The study presented here yields directly determined values for 55 Cnc's stellar astrophysical parameters based on improved interferometry: R = 0.943 ± 0.010 R ...
K. V. Braun +25 more
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Christian Huygens and William Derham and 18th Century Precursors to the Habitable Zone
Research Notes of the AASBoth Christian Huygens and William Derham expressed ideas that are prescient to the concept of a circumstellar habitable zone: liquid water is a precondition for life, there is a region within the solar system within which liquid surface water can exist ...
Graeme H. Smith
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