Habitable zones and UV habitable zones around host stars

Habitable zones and UV habitable zones around host stars
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主星周围的宜居带和紫外线宜居带

DOI:
10.1007/s10509-009-0173-9
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发表时间:
2010-03
影响因子:
1.9
通讯作者:
Guo, Jianpo
Guo, Jianpo
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhang, Fenghui;Zhang, Xianfei;Han, Zhanwen;Guo, Jianpo

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紫外线辐射对于生命来说是一把双刃剑。如果太强,陆地生物系统就会受到破坏。如果它太弱,许多生化化合物的合成就无法进行。我们试图获得连续的紫外宜居带,并将紫外宜居带与主星的宜居带进行比较。利用紫外宜居带边界紫外辐射,我们计算了质量在0.08到4.00 M⊙之间的主星的紫外宜居带。对于有效温度低于4,600 K的主星来说,紫外宜居带比宜居带更近。对于有效温度高于7,137 K的主星来说,紫外宜居带比宜居带更远。对于作为主星的热亚矮星来说,其紫外线宜居带的距离约为宜居带的十倍,不适合生命的存在。
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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