Pollution of single white dwarfs by accretion of many small asteroids

被引：178

作者：

Jura, M. ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Ctr Astrobiol, Los Angeles, CA 90095 USA

来源：

ASTRONOMICAL JOURNAL | 2008年 / 135卷 / 05期

关键词：

planetary systems; white dwarfs;

D O I：

10.1088/0004-6256/135/5/1785

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Extrapolating from the solar system's asteroid belt, we propose that externally contaminated white dwarfs without an infrared excess may be experiencing continuous accretion of gas-phase material that is ultimately derived from the tidal destruction of multiple small asteroids. If this scenario is correct, then observations of metal-polluted white dwarfs may lead to determination of the bulk elemental compositions of ensembles of extrasolar minor planets.

引用

页码：1785 / 1792

页数：8

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