Asteroid belt survival through stellar evolution: dependence on the stellar mass

被引：9

作者：

Martin, Rebecca G. ^{[1
]}

Livio, Mario ^{[1
]}

Smallwood, Jeremy L. ^{[1
]}

Chen, Cheng ^{[1
]}

机构：

[1] Univ Nevada, Dept Phys & Astron, 4505 South Maryland Pkwy, Las Vegas, NV 89154 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 494卷 / 01期

关键词：

minor planets; asteroids:; general; planets and satellites: dynamical evolution and stability; stars: AGB and post-AGB; white dwarfs; PLANETARY DEBRIS DISCS; MAIN-SEQUENCE DEBRIS; YORP BREAK-UP; WHITE-DWARFS; SNOW LINE; ORBITAL EVOLUTION; GIANT PLANETS; ACCRETION; YARKOVSKY; STAR;

D O I：

10.1093/mnrasl/slaa030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Polluted white dwarfs are generally accreting terrestrial-like material that may originate from a debris belt like the asteroid belt in the Solar system. The fraction of white dwarfs that are polluted drops off significantly for white dwarfs with masses M-WD greater than or similar to 0.8 M-circle dot. This implies that asteroid belts and planetary systems around main-sequence (MS) stars with mass M-MS greater than or similar to 3M(circle dot) may not form because of the intense radiation from the star. This is in agreement with current debris disc and exoplanet observations. The fraction of white dwarfs that show pollution also drops off significantly for low-mass white dwarfs (M-WD less than or similar to 0.55M(circle dot)). However, the low-mass white dwarfs that do show pollution are not currently accreting but have accreted in the past. We suggest that asteroid belts around MS stars with masses M-MS less than or similar to 2M(circle dot) are not likely to survive the stellar evolution process. The destruction likely occurs during the AGB phase and could be the result of interactions of the asteroids with the stellar wind, the high radiation, or, for the lowest mass stars that have an unusually close-in asteroid belt, scattering during the tidal orbital decay of the inner planetary system.

引用

页码：L17 / L21

页数：5

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