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1999A&A...350.1085C - Astronomy and Astrophysics, volume 3501085-1088 (1999/10-3)
The distance to eight X-ray sources derived from Hipparcos observations.
CLARK L.L. and DOLAN J.F.
Abstract (from CDS):
The parallaxes of eight galactic X-ray sources measured by Hipparcos are consistent with zero in all but two cases, 4U1145-619 (= Cen X-5) and HZ43. The parallax and proper motion measured for each of the others, including the Be/neutron star binaries X Per and A0535+26 and the massive X-ray binaries 4U0900-40, 4U1700-37, and Cyg XR-1, are consistent with their spectroscopic parallaxes. These results provide no evidence that visible stars in X-ray binaries have a luminosity that is abnormal for their spectral type.
Abstract Copyright: ∼
Journal keyword(s): astrometry - stars: distances - stars: kinematics - X-rays: stars
Simbad objects: 9
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