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Astrophysics > Earth and Planetary Astrophysics

arXiv:1306.2889 (astro-ph)
[Submitted on 12 Jun 2013 (v1), last revised 19 Sep 2013 (this version, v4)]

Title:Calculating the Habitable Zone of Binary Star Systems I: S-Type Binaries

Authors:L. Kaltenegger, N. Haghighipour
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Abstract:We have developed a comprehensive methodology for calculating the boundaries of the habitable zone (HZ) of planet-hosting S-type binary star systems. Our approach is general and takes into account the contribution of both stars to the location and extent of the Binary HZ with different stellar spectral types. We have studied how the binary eccentricity and stellar energy distribution affect the extent of the habitable zone. Results indicate that in binaries where the combination of mass-ratio and orbital eccentricity allows planet formation around a star of the system to proceed successfully, the effect of a less luminous secondary on the location of the primary's habitable zone is generally negligible. However, when the secondary is more luminous, it can influence the extent of the HZ. We present the details of the derivations of our methodology and discuss its application to the Binary HZ around the primary and secondary main sequence stars of an FF, MM, and FM binary, as well as two known planet-hosting binaries alpha Cen AB and HD 196886.
Comments: 7 pages, 10 figures, 3 tables, in press ApJ (3 new figures showing max effect of a secondary for different binary stars)
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Methods for Astrophysics (astro-ph.IM); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:1306.2889 [astro-ph.EP]
  (or arXiv:1306.2889v4 [astro-ph.EP] for this version)
  https://doi.org/10.48550/arXiv.1306.2889
Related DOI: https://doi.org/10.1088/0004-637X/777/2/165

Submission history

From: Lisa Kaltenegger [view email]
[v1] Wed, 12 Jun 2013 16:49:29 UTC (755 KB)
[v2] Thu, 13 Jun 2013 20:43:36 UTC (756 KB)
[v3] Mon, 22 Jul 2013 15:30:19 UTC (1,016 KB)
[v4] Thu, 19 Sep 2013 16:27:15 UTC (1,905 KB)
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