The use of the (B-I) color index and applications of the (B-I) versus (B-V) relationship

Details The use of the (B-I) color index and applications of the (B-I) versus (B-V) relationship The use of the (B-I) color index and applications of the (B-I) versus (B-V) relationship

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...289..756n&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 289, no. 3, p. 756-762

Astronomy and Astrophysics

Astrophysics

12

Astronomical Photometry, Interstellar Extinction, Open Clusters, Stellar Color, Stellar Temperature, Absorptivity, Abundance, Color-Color Diagram, Data Correlation, Hertzsprung-Russell Diagram

Scientific paper

We present an analysis derived from the UBVRI photometry of 12 open clusters, that shows a linear relationship between the color indices (B-I) and (B-V). Due to this characteristic the (B-I) color index is a more sensitive estimator of the effective stellar temperatures with respect to the widely used (B-V), and it is less affected by the absorption bands of H2 molecules in low mass stars. Furthermore, from the two colors (B-I) vs. (B-V) diagrams we derive a new method yielding a parameter that estimates the interstellar reddening for each cluster.

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