Habitable zones and UV habitable zones around host stars |
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Authors: | Jianpo Guo Fenghui Zhang Xianfei Zhang Zhanwen Han |
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Institution: | 1.National Astronomical Observatories/Yunnan Observatory,Chinese Academy of Sciences,Kunming,P.R. China;2.Graduate School of the Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing,P.R. China |
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Abstract: | Ultraviolet radiation is a double-edged sword to life. If it is too strong, the terrestrial biological systems will be damaged.
And if it is too weak, the synthesis of many biochemical compounds cannot go along. We try to obtain the continuous ultraviolet
habitable zones, and compare the ultraviolet habitable zones with the habitable zones of host stars. Using the boundary ultraviolet
radiation of ultraviolet habitable zone, we calculate the ultraviolet habitable zones of host stars with masses from 0.08
to 4.00 M
⊙. For the host stars with effective temperatures lower than 4,600 K, the ultraviolet habitable zones are closer than the habitable
zones. For the host stars with effective temperatures higher than 7,137 K, the ultraviolet habitable zones are farther than
the habitable zones. For a hot subdwarf as a host star, the distance of the ultraviolet habitable zone is about ten times
more than that of the habitable zone, which is not suitable for the existence of life. |
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Keywords: | |
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