Halting planet migration in the evacuated centers of protoplanetary disks

被引：48
作者：
Kuchner, MJ [1 ]
Lecar, M [1 ]
机构：
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
ASTROPHYSICAL JOURNAL | 2002年 / 574卷 / 01期
关键词：
astrobiology; circumstellar matter; planetary systems : formation; planetary systems : protoplanetary disks; stars : formation;
D O I：
10.1086/342370
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Precise Doppler searches for extrasolar planets find a surfeit of planets with orbital periods of 3-4 days and no planets with orbital periods less than 3 days. The circumstellar distance R-0, where small grains in a proto- planetary disk reach sublimation temperatures (similar to1500 K), corresponds to a period of 6 days. Interior to, R-0 turbulent accretion due to magnetorotational instability may evacuate the disk center. We suggest that planets with orbital periods of 3-4 days are so common because migrating planets halt once this evacuated region contains the sites of their exterior 2 : 1 Lindblad resonances.
引用
收藏
页码：L87 / L89
页数：3
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