MK classification of the brighter praesepe stars

Details MK classification of the brighter praesepe stars MK classification of the brighter praesepe stars

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..307a&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, March 1986, p. 307-309.

Astronomy and Astrophysics

Astronomy

20

A Stars, Metallic Stars, Peculiar Stars, Star Clusters, Stellar Rotation, Stellar Spectra, Classifications, Hertzsprung-Russell Diagram, Open Clusters, Stellar Luminosity

Scientific paper

MK classifications have been obtained for the 42 brightest stars in the rich open cluster Praesepe. In the H-R diagram, 10 of the 12 stars brighter than V = 7.0 mag have luminosity classes brighter than V or are Am stars. Only two of the stars fainter than V = 7.0 mag are of luminosity class IV. The nine Am stars discovered by Bidelman (1956) are confirmed. The frequency of these among the late A stars is consistent with results for field stars, but there is only one Ap star. The reasons for that deficiency are discussed.

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