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Title: UBVRI CCD photometry of the OB associations Bochum 1 and Bochum 6
Authors: Yadav, R. K. S
Sagar, R
Keywords: OB Associations;Bochum 1 and Bochum 6 - star;Interstellar extinction;Luminosity function;Mass function;HR diagram
Issue Date: 2003
Publisher: Astronomical Society of India
Citation: BASI, Vol. 31, No. 2, pp. 87 - 100
Abstract: We report the first deep $UBVRI$ CCD photometry of 2460 stars in the field of two poorly studied OB associations Bochum 1 and Bochum 6. We selected 15 and 14 probable members in Bochum 1 and Bochum 6 respectively using photometric criteria and proper motion data of Tycho 2. Our analysis indicates variable reddening having mean value of $E(B-V)=$ 0.47$\pm$0.10 and 0.71$\pm$0.13 mag for Bochum 1 and Bochum 6 respectively. Using the zero-age main-sequence fitting method, we derive a distance of 2.8$\pm$0.4 and 2.5$\pm$0.4 Kpc for Bochum 1 and Bochum 6 respectively. We obtain an age of 10$\pm$5 Myrs for both the associations from isochrone fitting. In both associations high and low mass stars have probably formed together. Within the observational uncertainties, mass spectrum of the both associations appears to be similar to the Salpeter's one.
Appears in Collections:BASI Publications

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