On the DDO absolute magnitudes of K giants

Details On the DDO absolute magnitudes of K giants On the DDO absolute magnitudes of K giants

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...250..400f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 250, no. 2, Oct. 1991, p. 400-406. Research supported by Alexander von Humbold

Astronomy and Astrophysics

Astrophysics

11

Giant Stars, K Stars, Late Stars, Open Clusters, Stellar Magnitude, Astrometry, Astronomical Observatories, Astronomical Photometry, Milky Way Galaxy

Scientific paper

DDO and BV photometry from the open cluster data base of Mermilliod (1988) and recent main sequence based estimates of cluster distances are used in order to check the absolute magnitudes of K giants derived from DDO photometry. The DDO system is shown to have no zero point error and it is shown that the absolute magnitudes of a sample of K giants by Egret et al. (1985) are systematically too bright by approximately 1 magnitude. The results of Robin (1989) for a mean absolute magnitude of K giants of M(v) = 1.0 rather than that of Egret et al. (1985), who found M(v) = 0.0, are therefore supported.

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