Evidence for a lost population of close-in exoplanets

被引：63

作者：

Davis, Timothy A. ^{[1
,2
]}

Wheatley, Peter J. ^{[1
]}

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Univ Oxford, Sub Dept Astrophys, Oxford OX1 3RH, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2009年 / 396卷 / 02期

关键词：

planetary systems; X-rays: stars; STELLAR X-RAY; EXTRASOLAR PLANETS; TRANSITING PLANETS; CORONAL ACTIVITY; ATMOSPHERIC LOSS; HOT JUPITERS; STARS; MASS; EVAPORATION; TIME;

D O I：

10.1111/j.1365-2966.2009.14763.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the evaporation history of known transiting exoplanets in order to consider the origin of observed correlations between mass, surface gravity and orbital period. We show that the survival of the known planets at their current separations is consistent with a simple model of evaporation, but that many of the same planets would not have survived closer to their host stars. These putative closer-in systems represent a lost population that could account for the observed correlations. We conclude that the relation underlying the correlations noted by Mazeh et al. and Southworth et al. is most likely a linear cut-off in the M(2)/R(3) versus a(-2) plane, and we show that the distribution of exoplanets in this plane is in close agreement with the evaporation model.

引用

页码：1012 / 1017

页数：6

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