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28 March 2024
 
  » arxiv » astro-ph/0003325

 Article overview


HS0907+1902: a new 4.2hr eclipsing dwarf nova
B.T. Gaensicke ; R.E. Fried ; H.-J. Hagen ; K. Beuermann ; D. Engels ; F.V. Hessman ; D. Nogami ; K. Reinsch ;
Date 22 Mar 2000
Subject astro-ph
AbstractWe report on follow-up spectroscopy and photometry of the cataclysmic variable candidate HS0907+1902 selected from the Hamburg Quasar Survey. B, V, and R photometry obtained during the first observed outburst of HS0907+1902 (V~13) reveals deep eclipses (DeltaV~2.1-2.8) and an orbital period Porb=4.2h with the eclipse depth decreasing to the red. The outburst eclipse profiles are symmetric, indicating an axisymmetrical brightness distribution in the accretion disc. We derive an inclination i~73deg-79deg from the eclipse duration. The quiescent spectrum obtained with the Hobby-Eberly Telescope shows double peaked emission lines of HI, HeI and FeI,II and clearly identifies the system as a dwarf nova. Absorption features of the secondary star are detected at red wavelengths from which a spectral class M3+-1.5 and a distance of d=320+-100pc are derived.
Source arXiv, astro-ph/0003325
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