Is life most likely around Sun-like stars?

被引：30

作者：

Lingam, Manasvi ^{[1
]}

Loeb, Abraham ^{[1
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 05期

关键词：

solar physics; stars; PREBIOTIC SYNTHESIS; ATMOSPHERIC OXYGEN; HABITABLE ZONES; PLANETS; ORIGINS; EVOLUTION; RADIATION; SELECTION; ESCAPE; COMMON;

D O I：

10.1088/1475-7516/2018/05/020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the habitability of Earth-analogs around stars of different masses, which is regulated by the stellar lifetime, stellar wind-induced atmospheric erosion, and biologically active ultraviolet (UV) irradiance. By estimating the timescales associated with each of these processes, we show that they collectively impose limits on the habitability of Earth-analogs. We conclude that planets orbiting most M-dwarfs are riot likely to host life, and that the highest probability of complex biospheres is for planets around K- and C-type stars. Our analysis suggests that the current existence of life near the Sun is slightly unusual, but not significantly anomalous.

引用

页数：12

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