Optical identification of two soft ROSAT sources in the old open cluster M67

Details Optical identification of two soft ROSAT sources in the old open cluster M67 Optical identification of two soft ROSAT sources in the old open cluster M67

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...290l..17p&link_type=abstract

Astronomy and Astrophysics 290L, L17-L20 (1994)

Astronomy and Astrophysics

Astrophysics

12

Cataclysmic Variables, White Dwarfs, Open Clusters And Associations: Individual: M67

Scientific paper

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.

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