Effects of rotation on the colours and line indices of stars. I - The Alpha Persei Cluster

Details Effects of rotation on the colours and line indices of stars. I - The Alpha Persei Cluster Effects of rotation on the colours and line indices of stars. I - The Alpha Persei Cluster

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988japa....9..107r&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 9, June 1988, p. 107-116.

Astronomy and Astrophysics

Astrophysics

5

B Stars, Binary Stars, Interstellar Extinction, Peculiar Stars, Stellar Color, Stellar Rotation, Angular Velocity, H Beta Line, Star Clusters, Stellar Magnitude

Scientific paper

Analysis of the available observational data for the Alpha-Persei cluster members shows that rotation effects on the intermediate-band indices c1 and (u-b) are considerable. In c1, rotation produces a reddening of 0.040 magnitudes per 100 km/s. In (u-b), the effect for B stars is found to be 0.06 magnitudes per 100 km/s of V sin i. The binaries and peculiar stars are found to behave differently in the color excess (due to rotation) versus V sin i diagrams. These empirical effects can be utilized to recalibrate these color indices and also to separate members that are either chemically peculiar or in binary systems.

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