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Optical spectra of the carbon-oxygen accretion discs in the ultra-compact X-ray binaries 4U 0614+09, 4U 1543-624 and 2S 0918-549
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UNSPECIFIED (2004) Optical spectra of the carbon-oxygen accretion discs in the ultra-compact X-ray binaries 4U 0614+09, 4U 1543-624 and 2S 0918-549. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 348 (1). L7-L11. ISSN 0035-8711
Full text not available from this repository.Abstract
We present optical spectra in the range 4600-8600 Angstrom for three low-mass X-ray binaries which have been suggested to belong to the class of ultra-compact X-ray binaries based on their X-ray spectra. Our spectra show no evidence for hydrogen or helium emission lines, as are seen in classical X-ray binaries. The spectrum of 4U 0614 + 09 does show emission lines, which we identify with carbon and oxygen lines of C II, CIII, OII and OIII. While the spectra of 4U 1543 624 and 2S 0918 549 have a lower signal-to-noise ratio, and thus are more difficult to interpret, some of the characteristic features of 4U 0614 + 09 are present in these spectra too, although sometimes they are clearly weaker. We conclude that the optical spectra give further evidence for the ultra-compact nature of these X-ray binaries and for their donor stars being carbon-oxygen white dwarfs.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Journal or Publication Title: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
| Publisher: | BLACKWELL PUBLISHING LTD |
| ISSN: | 0035-8711 |
| Date: | 11 February 2004 |
| Volume: | 348 |
| Number: | 1 |
| Number of Pages: | 5 |
| Page Range: | L7-L11 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/8815 |
Data sourced from Thomson Reuters' Web of Knowledge
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