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X-ray observations of 4 Draconis : symbiotic binary or cataclysmic triple?
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Wheatley, P. J., Mukai, Koji and de Martino, Domitilla (2003) X-ray observations of 4 Draconis : symbiotic binary or cataclysmic triple? Monthly Notices of the Royal Astronomical Society, 346 (3). pp. 855-860. doi:10.1111/j.1365-2966.2003.07149.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2003.07149.x
Abstract
We present the first X-ray observations of the 4 Draconis system, consisting of an M3 III giant with a hot ultraviolet companion. It has been claimed that the companion is itself an AM Her-type binary system, an identification that places strong constraints on the evolution of cataclysmic variables. We find that the X-ray properties of 4 Draconis are consistent with the presence of an accreting white dwarf, but not consistent with the presence of an AM Her system. We conclude that 4 Draconis is therefore most likely a symbiotic binary containing a white dwarf accreting material from the wind of the red giant.
The X-ray spectrum of 4 Draconis is sometimes dominated by partially ionized photoelectric absorption, presumably due to the wind of the red giant. We note that X-ray monitoring of such systems would provide a powerful probe of the wind and mass-loss rate of the giant, and would allow a detailed test of wind accretion models.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | X-ray astronomy, X-ray binaries | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
| Publisher: | Oxford University Press | ||||||||
| ISSN: | 0035-8711 | ||||||||
| Official Date: | 2003 | ||||||||
| Dates: |
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| Volume: | 346 | ||||||||
| Number: | 3 | ||||||||
| Page Range: | pp. 855-860 | ||||||||
| DOI: | 10.1111/j.1365-2966.2003.07149.x | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Date of first compliant deposit: | 6 January 2017 | ||||||||
| Date of first compliant Open Access: | 11 January 2017 | ||||||||
| Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC) | ||||||||
| Open Access Version: |
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