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Fiducial Stellar Population Sequences for the u'g'r'i'z' System
- Source :
- Astron.J.135:682-692,2008
- Publication Year :
- 2007
-
Abstract
- We describe an extensive observational project that has obtained high-quality and homogeneous photometry for a number of different Galactic star clusters (including M 92, M 13, M 3, M 71, and NGC 6791) spanning a wide range in metallicity (-2.3<[Fe/H]<+0.4), as observed in the u'g'r'i'z' passbands with the MegaCam wide-field imager on the Canada-France-Hawaii Telescope. By employing these purest of stellar populations, fiducial sequences have been defined from color-magnitude diagrams that extend from the tip of the red-giant branch down to approximately 4 magnitudes below the turnoff: these sequences have been accurately calibrated to the standard u'g'r'i'z' system via a set of secondary photometric standards located within these same clusters. Consequently, they can serve as a valuable set of empirical fiducials for the interpretation of stellar populations data in the u'g'r'i'z' system.<br />Comment: 16 pages, 7 tables, 13 figures; accepted for publication in AJ
- Subjects :
- Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- Astron.J.135:682-692,2008
- Publication Type :
- Report
- Accession number :
- edsarx.0711.4045
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0004-6256/135/2/682