UV Surface Environments and Atmospheres of Earth-like Planets Orbiting White Dwarfs

被引：20
|
作者：
Kozakis, Thea [1 ]
Kaltenegger, Lisa [1 ]
Hoard, D. W. [2 ]
机构：
[1] Cornell Univ, Carl Sagan Inst, Ithaca, NY 14853 USA
[2] Eureka Sci, Oakland, CA USA
来源：
ASTROPHYSICAL JOURNAL | 2018年 / 862卷 / 01期
关键词：
astrobiology; planets and satellites: atmospheres; planets and satellites: terrestrial planets; stars: evolution; white dwarfs; DIGITAL SKY SURVEY; ULTRAVIOLET-RADIATION; MINOR PLANET; STARS; EVOLUTION; GREENHOUSE; MODELS; SYSTEM; DEBRIS; LIGHT;
D O I：
10.3847/1538-4357/aacbc7
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An Earth-like exoplanet orbiting a white dwarf (WD) would be exposed to different UV environments than Earth, influencing both its atmospheric photochemistry and UV surface environment. Through the use of a coupled 1D climate-photochemistry code, we model atmospheres of Earth-like planets in the habitable zone (HZ) of WDs for surface temperatures between 6000 and 4000 K, corresponding to about 7 billion years of WD evolution, and discuss the evolution of planetary models in the HZ during that evolution.
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页数：12
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