A gaseous metal disk around a white dwarf
Gänsicke, B. T. (Boris T.), Marsh, T. R., Southworth, J. (John) and Rebassa-Mansergas, A.. (2006) A gaseous metal disk around a white dwarf. SCIENCE, 314 (5807). pp. 1908-1910. ISSN 0036-8075Full text not available from this repository.
Official URL: http://dx.doi.org/10.1126/science.1135033
The destiny of planetary systems through the late evolution of their host stars is very uncertain. We report a metal-rich gas disk around a moderately hot and young white dwarf. A dynamical model of the double-peaked emission lines constrains the outer disk radius to just 1.2 solar radii. The likely origin of the disk is a tidally disrupted asteroid, which has been destabilized from its initial orbit at a distance of more than 1000 solar radii by the interaction with a relatively massive planetesimal object or a planet. The white dwarf mass of 0.77 solar mass implies that planetary systems may form around high-mass stars.
|Item Type:||Journal Article|
|Journal or Publication Title:||SCIENCE|
|Publisher:||AMER ASSOC ADVANCEMENT SCIENCE|
|Date:||22 December 2006|
|Number of Pages:||3|
|Page Range:||pp. 1908-1910|
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