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1994A&A...290L..17P - Astronomy and Astrophysics, volume 290L17-20 (1994/10-1)
Optical identification of two soft ROSAT sources in the old open cluster M67.
PASQUINI L., BELLONI T. and ABBOTT T.M.C.
Abstract (from CDS):
We have obtained low-resolution spectra of two soft ROSAT sources in the field of the old (∼4 Gyrs) open cluster M67. One of the sources is an AM Her type cataclysmic variable (CV), and the other is a weak-lined DA white dwarf (WD). Both sources are located in the central region of M67 and they are probable members of the cluster. The AM Her is the first spectroscopically confirmed AM Her system found associated with an open cluster and the WD is the only degenerate star known in M67.
Abstract Copyright: ∼
Journal keyword(s): cataclysmic variables - white dwarfs - open clusters and associations: individual: M67
Simbad objects: 9
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