Photosynthesis on habitable planets around low-mass stars

被引：26

作者：

Lingam, Manasvi ^{[1
,2
]}

Loeb, Abraham ^{[1
,2
]}

机构：

[1] Harvard Univ, Inst Theory & Computat, Cambridge, MA 02138 USA

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

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 485卷 / 04期

关键词：

extraterrestrial intelligence; astrobiology; stars: low-mass; EVOLUTION; OXYGEN; TERRESTRIAL; LIKELIHOOD; OCEAN; LIFE; RISE;

D O I：

10.1093/mnras/stz847

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that planets around M-dwarfs with M-star less than or similar to 0.2 M-circle dot may not receive enough photons in the photosynthetically active range of 400-750 nm to sustain Earth-like biospheres. As a result of the lower biological productivity, it is likely that biotic molecular oxygen would not build-up to detectable levels in the atmospheres of habitable planets orbiting low-mass stars, consistent with prior work by Lehmer et al. We also estimate the minimum flaring rate for sustaining biospheres with Earth-like productivity and permitting the build-up of atmospheric oxygen, and find that the overwhelming majority of M-dwarfs are unlikely to exceed this threshold.

引用

页码：5924 / 5928

页数：5

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