A tidally disrupted asteroid around the white dwarf G29-38

被引：452

作者：

Jura, M ^{[1
]}

机构：

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

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 584卷 / 02期

关键词：

circumstellar matter; white dwarfs;

D O I：

10.1086/374036

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The infrared excess around the white dwarf G29-38 can be explained by emission from an opaque flat ring of dust with an inner radius of 0.14 R-. and an outer radius of less than 1 R-.. This ring lies within the Roche region of the white dwarf where an asteroid could have been tidally destroyed, producing a system reminiscent of Saturn's rings. Accretion onto the white dwarf from this circumstellar dust can explain the observed calcium abundance in the atmosphere of G29-38. Either as a bombardment by a series of asteroids or because of one large disruption, the total amount of matter accreted onto the white dwarf may have been similar to4 x 10(24) g, comparable to the total mass of asteroids in the solar system, or, equivalently, about 1% of the mass in the asteroid belt around the main-sequence star zeta Lep.

引用

页码：L91 / L94

页数：4

共 47 条

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ASTROPHYSICAL JOURNAL, 2024, 963 (02):

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