Infrared Emission from the Dusty Disk Orbiting GD 362, An Externally-Polluted White Dwarf

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dc.creatorJura, M.
dc.creatorFarihi, J.
dc.creatorZuckerman, B.
dc.creatorBecklin, E. E.
dc.creator;
dc.date2007-01-16
dc.date.accessioned2026-07-07T11:20:59Z
dc.date.available2026-07-07T11:20:59Z
dc.descriptionWe report Spitzer Space Telescope photometry between 3.6 microns and 24 microns and spectroscopy between 5 microns and 15 microns of GD 362, a white dwarf with an effective temperature near 10,000 K that displays a remarkably high concentration of metals in its photosphere and a thermal infrared excess. We approximately reproduce both the infrared continuum and the very strong 10 micron silicate emission feature with a model of an orbiting dusty disk which is flat out to 50 stellar radii and warped between 50 and 70 stellar radii. The relatively small amount of cold material implied by the weak 24 mircon flux argues that the disk lies within the Roche radius of the star, and we may be witnessing a system where an asteroidal-size body has been tidally destroyed. If so, determination of the photospheric metal abundances may measure the bulk composition of an extrasolar minor planet.
dc.descriptionAJ, in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0701469
dc.identifierhttp://arxiv.org/abs/astro-ph/0701469
dc.identifierAstron.J.133:1927-1933,2007
dc.identifierdoi:10.1086/512734
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194131
dc.subjectAstrophysics
dc.titleInfrared Emission from the Dusty Disk Orbiting GD 362, An Externally-Polluted White Dwarf
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