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A dusty component to the gaseous debris disk around the white dwarf SDSS J1228+1040

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Brinkworth, C. S., Gaensicke, B. T. (Boris T.), Marsh, T. R., Hoard, D. W. (Donald Wayne) and Tappert, Claus (2009) A dusty component to the gaseous debris disk around the white dwarf SDSS J1228+1040. The Astrophysical Journal, Vol.696 (No.2). pp. 1402-1406. doi:10.1088/0004-637X/696/2/1402 ISSN 0004-637X.

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Official URL: http://dx.doi.org/10.1088/0004-637X/696/2/1402

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Abstract

We present Infrared Spectrometer And Array Camera (ISAAC) spectroscopy and ISAAC, UKIDSS, and Spitzer Space Telescope broadband photometry of SDSS J1228+1040-a white dwarf for which evidence of a gaseous metal-rich circumstellar disk has previously been found from optical emission lines. The data show a clear excess in the near- and mid-infrared (IR), providing compelling evidence for the presence of dust in addition to the previously identified gaseous debris disk around the star. The IR excess can be modeled in terms of an optically thick but geometrically thin disk. We find that the inner disk temperatures must be relatively high (similar to 1700 K) in order to fit the spectral energy distribution in the near- IR. These data provide the first evidence for the coexistence of both gas and dust in a disk around a white dwarf, and show that their presence is possible even around moderately hot (similar to 22,000 K) stars.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Circumstellar matter, White dwarf stars
Journal or Publication Title: The Astrophysical Journal
Publisher: Institute of Physics Publishing, Inc.
ISSN: 0004-637X
Official Date: 10 May 2009
Dates:
DateEvent
10 May 2009Published
Volume: Vol.696
Number: No.2
Number of Pages: 5
Page Range: pp. 1402-1406
DOI: 10.1088/0004-637X/696/2/1402
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: United States. National Aeronautics and Space Administration (NASA), National Science Foundation (U.S.) (NSF)
Grant number: 1407 (NASA), 960785 (NASA)

Data sourced from Thomson Reuters' Web of Knowledge

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