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arXiv:0711.4045 (astro-ph)
[Submitted on 26 Nov 2007]

Title:Fiducial Stellar Population Sequences for the u'g'r'i'z' System

Authors:James L. Clem, Don A. VandenBerg, Peter B. Stetson
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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.
Comments: 16 pages, 7 tables, 13 figures; accepted for publication in AJ
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0711.4045 [astro-ph]
  (or arXiv:0711.4045v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0711.4045
Journal reference: Astron.J.135:682-692,2008
Related DOI: https://doi.org/10.1088/0004-6256/135/2/682

Submission history

From: James L. Clem [view email]
[v1] Mon, 26 Nov 2007 16:23:05 UTC (191 KB)
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