Pollution of single white dwarfs by accretion of many small asteroids

Details Pollution of single white dwarfs by accretion of many small asteroids Pollution of single white dwarfs by accretion of many small asteroids

2008-02-27

arxiv.org/abs/0802.4075v1

Astronomy and Astrophysics

Astrophysics

AJ, in press, 19 pages, 4 figures

Scientific paper

10.1088/0004-6256/135/5/1785

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 ultimately is derived from the tidal destruction of multiple small asteroids. If this scenario is correct, then observations of metal-polluted white dwarfs may lead to determining the bulk elemental compositions of ensembles of extrasolar minor planets.

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