TY - JOUR
T1 - An analytic method to determine habitable zones for S-type planetary orbits in binary star systems
AU - Eggl, Siegfried
AU - Pilat-Lohinger, Elke
AU - Georgakarakos, Nikolaos
AU - Gyergyovits, Markus
AU - Funk, Barbara
PY - 2012/6/10
Y1 - 2012/6/10
N2 - With more and more extrasolar planets discovered in and around binary star systems, questions concerning the determination of the classical habitable zone have arisen. Do the radiative and gravitational perturbations of the second star influence the extent of the habitable zone significantly, or is it sufficient to consider the host star only? In this article, we investigate the implications of stellar companions with different spectral types on the insolation a terrestrial planet receives orbiting a Sun-like primary. We present time-independent analytical estimates and compare them to insolation statistics gained via high precision numerical orbit calculations. Results suggest a strong dependence of permanent habitability on the binary's eccentricity, as well as a possible extension of habitable zones toward the secondary in close binary systems.
AB - With more and more extrasolar planets discovered in and around binary star systems, questions concerning the determination of the classical habitable zone have arisen. Do the radiative and gravitational perturbations of the second star influence the extent of the habitable zone significantly, or is it sufficient to consider the host star only? In this article, we investigate the implications of stellar companions with different spectral types on the insolation a terrestrial planet receives orbiting a Sun-like primary. We present time-independent analytical estimates and compare them to insolation statistics gained via high precision numerical orbit calculations. Results suggest a strong dependence of permanent habitability on the binary's eccentricity, as well as a possible extension of habitable zones toward the secondary in close binary systems.
KW - astrobiology
KW - celestial mechanics
KW - methods: analytical
KW - planet-star interactions
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U2 - 10.1088/0004-637X/752/1/74
DO - 10.1088/0004-637X/752/1/74
M3 - Article
AN - SCOPUS:84861489043
SN - 0004-637X
VL - 752
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 74
ER -