The Dust cloud around the White Dwarf G 29-38

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dc.creatorReach, William T.
dc.creatorKuchner, Marc J.
dc.creatorvon Hippel, Ted
dc.creatorBurrows, Adam
dc.creatorMullally, Fergal
dc.creatorKilic, Mukremin
dc.creatorWinget, D. E.
dc.date2005-11-11
dc.date2006-01-13
dc.date.accessioned2026-07-07T09:30:14Z
dc.date.available2026-07-07T09:30:14Z
dc.descriptionWe present new observations of the white dwarf G 29-38 with the camera (4.5 and 8 microns), photometer (24 microns), and spectrograph (5.5-14 microns) of the Spitzer Space Telescope. This star has an exceptionally large infrared excess amounting to 3% of the bolometric luminosity. The spectral energy distribution has a continuum peak around 4.5 micros and a 9-11 micron emission feature 1.25 times brighter than the continuum. A mixture of amorphous olivine and a small amount of forsterite in an emitting region 1-5 Rsun from the star can reproduce the shape of the 9-11 micron feature. The spectral energy distribution also appears to require amorphous carbon to explain the hot continuum. Our new measurements support the idea that a relatively recent disruption of a comet or asteroid created the cloud.
dc.descriptionaccepted for publication in the Astrophysical Journal Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/0511358
dc.identifierhttp://arxiv.org/abs/astro-ph/0511358
dc.identifierAstrophys.J. 635 (2005) L161-L165
dc.identifierdoi:10.1086/499561
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158062
dc.subjectAstrophysics
dc.titleThe Dust cloud around the White Dwarf G 29-38
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