THE EVOLUTION OF STELLAR ROTATION AND THE HYDROGEN ATMOSPHERES OF HABITABLE-ZONE TERRESTRIAL PLANETS

被引：94

作者：

Johnstone, C. P. ^{[1
]}

Gudel, M. ^{[1
]}

Stokl, A. ^{[1
]}

Lammer, H. ^{[2
]}

Tu, L. ^{[1
]}

Kislyakova, K. G. ^{[2
]}

Luftinger, T. ^{[1
]}

Odert, P. ^{[2
]}

Erkaev, N. V. ^{[3
,4
]}

Dorfi, E. A. ^{[1
]}

机构：

[1] Univ Vienna, Dept Astrophys, Vienna, Austria

[2] Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria

[3] Russian Acad Sci, Inst Computat Modelling, Siberian Div, Krasnoyarsk, Russia

[4] Siberian Fed Univ, Krasnoyarsk, Russia

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2015年 / 815卷 / 01期

关键词：

planets and satellites: atmospheres; planets and satellites: terrestrial planets; planet-star interactions; stars: activity; stars: low-mass; stars: rotation; ANGULAR-MOMENTUM EVOLUTION; LOW-MASS STARS; X-RAY SUN; SUPER-EARTHS; HYDRODYNAMIC ESCAPE; MEAN OPACITIES; PICK-UP; EXOPLANETS; I; EXPANSION;

D O I：

10.1088/2041-8205/815/1/L12

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Terrestrial planets formed within gaseous protoplanetary disks can accumulate significant hydrogen envelopes. The evolution of such an atmosphere due to XUV driven evaporation depends on the activity evolution of the host star, which itself depends sensitively on its rotational evolution, and therefore on its initial rotation rate. In this Letter, we derive an easily applicable method for calculating planetary atmosphere evaporation that combines models for a hydrostatic lower atmosphere and a hydrodynamic upper atmosphere. We show that the initial rotation rate of the central star is of critical importance for the evolution of planetary atmospheres and can determine if a planet keeps or loses its primordial hydrogen envelope. Our results highlight the need for a detailed treatment of stellar activity evolution when studying the evolution of planetary atmospheres.

引用

页数：6

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