Spectroscopy of the Optical Counterpart to Ser X-1
arXiv:astro-ph/0310796 · doi:10.1111/j.1365-2966.2004.07347.x
Abstract
We present WHT and VLT spectroscopy of MM Ser, the optical counterpart to Ser X-1. We deblend the red spectra of the two close stars identified by Wachter (1997) and show that the brighter of the two is responsible for the Halpha and HeI emission, hence confirming that this is the true counterpart of the X-ray source. We also identify several HeII and NIII lines in the blue spectrum. The isolated emission lines are all remarkably narrow, with FWHM 200-300 km/s. The Bowen blend has structure suggesting that the individual components are also narrow. These narrow lines could be from the disc if the binary inclination is quite low, or they could come from a more localised region such as the heated face of the companion star. Several interstellar lines are detected and indicate that the reddening is moderate, and consistent with the neutral hydrogen column density inferred in X-rays.
arXiv comment6 pages, accepted for publication in MNRAS
References in corpus (6)
- Bowen Fluorescence from the Companion Star in X1822-371
- Optical Spectroscopy of GRO J1655-40
- Optical studies of the X-ray transient XTE J2123-058 - II. Phase-resolved spectroscopy
- An optimal extraction of spatially blended spectra
- Optical Spectroscopy of GX 339-4 - Paper I: Orbital Modulation
- New Results for Two Optically Faint Low Mass X-Ray Binary Systems
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