Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-01
Mon.Not.Roy.Astron.Soc. 348 (2004) L7
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07486.x
We present optical spectra in the range 4600 -- 8600 A 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 CII, 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.
Jonker Peter G.
Marsh Thomas R.
Nelemans Gija
van der Klis Michiel
No associations
LandOfFree
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 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 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 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-687418