The distances to the X-ray binaries LSI +61 303 and A0535+262

Details The distances to the X-ray binaries LSI +61 303 and A0535+262 The distances to the X-ray binaries LSI +61 303 and A0535+262

1998-03-10

arxiv.org/abs/astro-ph/9803113v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS Letters

Scientific paper

10.1046/j.1365-8711.1998.01593.x

Chevalier & Ilovaisky (1998) use Hipparcos data to show that the X-ray binary systems LSI+61 303 and A0535+262 are a factor of ten closer (i.e. d = few hundred pc) than previously thought (d = 2 kpc). We present high quality CCD spectra of the systems, and conclude that the spectral types, reddening and absolute magnitudes of these objects are strongly inconsistent with the closer distances. We propose that the Hipparcos distances to these two systems are incorrect due to their relatively faint optical magnitudes.

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