The two-color diagram of stars with large luminosity in the Magellanic Clouds

Details The two-color diagram of stars with large luminosity in the Magellanic Clouds The two-color diagram of stars with large luminosity in the Magellanic Clouds

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...115...97i&link_type=abstract

Astronomy and Astrophysics, vol. 115, no. 1, Nov. 1982, p. 97-103. In German.

Astronomy and Astrophysics

Astrophysics

9

Magellanic Clouds, Stellar Color, Stellar Luminosity, Stellar Spectrophotometry, Supergiant Stars, Calibrating, Interstellar Extinction, Stellar Magnitude, Ultraviolet Radiation

Scientific paper

Currently available calibration methods and their drawbacks are considered, taking into account the spectroscopic-photometric procedure, and the photometric procedure. It is found that the available methods for the determination of the intrinsic relations (U-B) vs. (B-V) produce various systematic errors. A description is presented of a procedure for the determination of the intrinsic colors which is free from the imperfections of the previous methods. A two-color diagram for stars from both Magellanic Clouds is presented, taking into account a subdivision of the stars according to the absolute magnitude and a correction for foreground reddening. A comparison is conducted between the intrinsic colors of stars in the Magellanic Clouds and stars in the Galaxy. It is found that the determination of the intrinsic colors as function of the absolute magnitude for stars in the Galaxy is significantly more difficult than for stars in the Magellanic Clouds. The (U-B) vs. (B-V)-relations for stars in the Magellanic Clouds together with the corresponding relations for stars in the Galaxy are presented in a graph.

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