The minimum-mass extrasolar nebula: in situ formation of close-in super-Earths

被引：348
作者：
Chiang, Eugene [1 ,2 ]
Laughlin, Gregory [3 ]
机构：
[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
[3] Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, Santa Cruz, CA 95064 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2013年 / 431卷 / 04期
关键词：
planets and satellites: atmospheres; planets and satellites: composition; planets and satellites: formation; planets and satellites: general; protoplanetary discs; SOLAR-TYPE STARS; MULTIPLE-PLANET SYSTEMS; SURFACE-LAYER ACCRETION; PROTOPLANETARY DISKS; GJ; 1214B; TRANSMISSION SPECTRUM; HOT JUPITERS; FORMING PLANETESIMALS; TIDAL EVOLUTION; HYDROGEN-RICH;
D O I：
10.1093/mnras/stt424
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Close-in super-Earths, with radii R approximate to 2-5R(circle plus) and orbital periods P < 100 d, orbit more than half, and perhaps nearly all, Sun-like stars in the Universe. We use this omnipresent population to construct the minimum-mass extrasolar nebula (MMEN), the circumstellar disc of solar-composition solids and gas from which such planets formed, if they formed near their current locations and did not migrate. In a series of back-of-the-envelope calculations, we demonstrate how in situ formation in the MMEN is fast, efficient, and can reproduce many of the observed properties of close-in super-Earths, including their gas-to-rock fractions. Testable predictions are discussed.
引用
收藏
页码：3444 / 3455
页数：12
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