Astronomy and Astrophysics – Astronomy
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.287..271c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 287, Issue 2, pp. 271-286.
Astronomy and Astrophysics
Astronomy
22
Surveys, Stars: Individual: Ey Cyg, Stars: Individual: Uu Aql, Stars: Individual: Ll Lyr, Stars: Individual: Tw Vir, Novae, Cataclysmic Variables
Scientific paper
A survey of 22 known and suspected cataclysmic variables has been carried out with the 4.2-m WHT on La Palma, using ISIS to provide coverage of most of the optical spectrum. 10 faint stars (UU Aql, AT Cnc, EY Cyg, CG Dra, LL Lyr, NN Ser, BC UMa, DV UMa, TW Vir and REJ1629+780) and one bright one (Z Cam) show red dwarf features in the spectrum. For UU Aql, EY Cyg, LL Lyr and TW Vir, this is the first direct spectroscopic detection of the red dwarf. For all these systems we have determined the most probable spectral type of the secondary star. In addition we find marginal evidence of the red dwarf in V391 Lyr, SW UMa and PQ Gem (=REJ0751+144). Allowing for selection effects, the proportion of systems that show evidence of the red dwarf is larger than that found in an earlier survey of brighter objects.
Catalan Maria S.
Connon Smith Robert
Jones H. P. D.
Sarna Marek J.
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