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BV CCD Photometry of M71: Distance and Age

Authors :
Hong-Suh Yim
Mun-Suk Chun
Yong-Ik Byun
Young-Jong Sohn
Source :
Journal of Astronomy and Space Sciences, Vol 21, Iss 1, Pp 1-10 (2004)
Publication Year :
2004
Publisher :
The Korean Space Science Society, 2004.

Abstract

We present BV CCD photometry of metal-rich globular cluster M71. Based on our color-magnitude diagram (CMD), we derive the distance to M71 using a sample of Hipparcos subdwarfs of similar metallicity. Our distance modulus is (m-M)V=13.46(± 0.17). CMD comparison was also made between M71 and 47 Tuc. We confirm that there exists a significant age difference(> 2 billion years) in spite of their similarity in metallicity.

Details

Language :
English
ISSN :
20935587 and 20931409
Volume :
21
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Journal of Astronomy and Space Sciences
Publication Type :
Academic Journal
Accession number :
edsdoj.97800cec44b54d2096b86e35d3e49763
Document Type :
article
Full Text :
https://doi.org/10.5140/JASS.2004.21.1.001