The WN4.5 component of HD 219460 in the open cluster Markarian 50

Details The WN4.5 component of HD 219460 in the open cluster Markarian 50 The WN4.5 component of HD 219460 in the open cluster Markarian 50

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88.1199t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 88, Aug. 1983, p. 1199-1209. Research supported by the Natural Sciences and Engineer

Astronomy and Astrophysics

Astronomy

17

Open Clusters, Stellar Spectrophotometry, Wolf-Rayet Stars, Astronomical Photography, B Stars, Hertzsprung-Russell Diagram, Radial Velocity, Stellar Color, Ubv Spectra

Scientific paper

The open cluster Markarian 50 is reinvestigated using photoelectric UBV photometry, resulting in a newly determined distance of 3.55±0.20 kpc, an age of ≡7×106 yr, and a space reddening for HD 219460 of EB-V = 0.90±0.01. The cluster is small and very poorly populated. The optical components of HD 219460 are identified as a possibly variable WN4.5 star and a brighter B1 II companion. Both stars appear to be single on the basis of new radial velocity, and seem certain to be cluster members. The location of the WR star in the cluster H-R diagram is consistent with evolution with a high rate of mass loss from a star of initially ≡30 M_sun;.

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