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Finding the instability strip for accreting pulsating white dwarfs from Hubble Space Telescope and optical observations
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Szkody, Paula, Mukadam, Anjum S., Gaensicke, B. T., Henden, Arne A., Templeton, Matthew, Holtzman, J., Montgomery, Michael H., Howell, Steve B., Nitta, Atsuko, Sion, Edward M., Schwartz, Richard Dean and Dillon, W. (2010) Finding the instability strip for accreting pulsating white dwarfs from Hubble Space Telescope and optical observations. The Astrophysical Journal, Vol.710 (No.1). pp. 64-77. doi:10.1088/0004-637X/710/1/64 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/710/1/64
Abstract
Time-resolved low resolution Hubble Space Telescope ultraviolet spectra together with ground-based optical photometry and spectra are used to constrain the temperatures and pulsation properties of six cataclysmic variables containing pulsating white dwarfs (WDs). Combining our temperature determinations for the five pulsating WDs that are several years past outburst with past results on six other systems shows that the instability strip for accreting pulsating WDs ranges from 10,500 to 15,000 K, a wider range than evident for ZZ Ceti pulsators. Analysis of the UV/optical pulsation properties reveals some puzzling aspects. While half the systems show high pulsation amplitudes in the UV compared to their optical counterparts, others show UV/optical amplitude ratios that are less than one or no pulsations at either wavelength region.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Dwarf novae, Ultraviolet stars, White dwarf stars, Stellar oscillations | ||||
| Journal or Publication Title: | The Astrophysical Journal | ||||
| Publisher: | Institute of Physics Publishing, Inc. | ||||
| ISSN: | 0004-637X | ||||
| Official Date: | 10 February 2010 | ||||
| Dates: |
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| Volume: | Vol.710 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 14 | ||||
| Page Range: | pp. 64-77 | ||||
| DOI: | 10.1088/0004-637X/710/1/64 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | United States. National Aeronautics and Space Administration (NASA), Association of Universities for Research in Astronomy (AURA), Particle Physics and Astronomy Research Council (Great Britain) (PPARC) | ||||
| Grant number: | HST-GO-11163.01 (NASA), NAS 5-26555 (NASA) |
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