Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..135b&link_type=abstract
(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews
Astronomy and Astrophysics
Astronomy
9
Exosat Satellite, Spaceborne Astronomy, Stellar Spectrophotometry, X Ray Sources, Balmer Series, Distance, Light Curve, Orbital Elements, Radial Velocity, Stellar Luminosity, Stellar Magnitude, Visible Spectrum
Scientific paper
The authors report preliminary results of X-ray and optical observations of the AM Her star H0139-68 during its low state at V ≡ 17 to 18. X-rays were detected only during ≡45% of the orbital period when the system was optically bright and the radial velocity of the Balmer lines was positive. The data show no evidence for accretion onto two active poles as indicated by previous X-ray and linear-polarization measurements. The authors find that the distance of the system based on its K-magnitude is d ≡ 130 pc.
Beuermann Klaus
Motch Ch.
Schwope Axel
Weissieker H.
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