The optical and X-ray decline of V 0332 + 53 (X 0331 + 53, BQ Cam)

Details The optical and X-ray decline of V 0332 + 53 (X 0331 + 53, BQ Cam) The optical and X-ray decline of V 0332 + 53 (X 0331 + 53, BQ Cam)

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162..117c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 117-120. ZWO-supported research.

Astronomy and Astrophysics

Astrophysics

30

B Stars, Optical Measurement, Stellar Spectra, X Ray Binaries, Emission Spectra, H Alpha Line, Neutron Stars, Spectral Line Width, Visible Spectrum

Scientific paper

The authors present optical spectra of the X-ray transient V 0332+53 (BQ Cam). The equivalent width of the Hα emission line in the spectrum has declined by a factor ≡2 compared with previous observations. This is interpreted as showing that V 0332+53 is surrounded by an evolving circumstellar envelope. EXOSAT observations failed to detect X-ray emission from V 0332+53 showing that the Hα emission decline has been accompanied by a cessation of the X-ray flaring previously observed. From measurements of optical I.S. bands the authors derive a reddening of E(B-V) = 1.88±0.10. They argue that the optical counterpart of V 0332+53 is a Be star viewed at a low inclination angle.

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