MK spectral classifications for 30 faint stars in Praesepe

Details MK spectral classifications for 30 faint stars in Praesepe MK spectral classifications for 30 faint stars in Praesepe

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92...90c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, July 1986, p. 90-93. NSERC-supported research.

Astronomy and Astrophysics

Astronomy

9

Classifications, Faint Objects, Praesepe Star Clusters, Stellar Spectra, Astronomical Catalogs, Hertzsprung-Russell Diagram, Late Stars, Main Sequence Stars, Open Clusters

Scientific paper

Faint members of the Praesepe open cluster were observed with the Garrison prime-focus spectrograph on the C.F.H. Telescope. MK spectral classifications are presented for 30 stars from F3 V to K7 V in a central region of the cluster. The spectra look identical to those of the Hyades stars in this interval. Apart from two obvious binaries and a background star, the H-R diagram shows an extremely narrow main sequence. This yields a distance modulus, Praesepe minus Hyades, of 3.0 mag.

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