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BV CCD Photometry of M71: Distance and Age
- 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