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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
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: |
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| 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) |
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