UBVRI CCD photometry of the OB associations Bochum 1 and Bochum 6

Yadav, R. K. S. ; Sagar, R. (2003) UBVRI CCD photometry of the OB associations Bochum 1 and Bochum 6 Bulletin of the Astronomical Society of India, 31 (2). pp. 87-100. ISSN 0304-9523

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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±0.10 and 0.71±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±0.4 and 2.5±0.4 Kpc for Bochum 1 and Bochum 6 respectively. We obtain an age of 10±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.

Item Type:Article
Source:Copyright of this article belongs to Astronomical Society of India.
Keywords:OB Associations; Bochum 1 and Bochum 6; Star: Interstellar Extinction; Luminosity Function; Mass Function; Hr Diagram;
ID Code:67790
Deposited On:31 Oct 2011 13:35
Last Modified:18 May 2016 14:45

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