Accuracy of Star Cluster Parameters from Integrated UBVRIJHK Photometry

Autor:	Bridzius, A., Narbutis, D., Stonkute, R., Deveikis, V., Vansevicius, V.
Rok vydání:	2009
Předmět:	Astrophysics - Galaxy Astrophysics Astrophysics - Instrumentation and Methods for Astrophysics
Zdroj:	BalticAstron. 17:337-349,2008
Druh dokumentu:	Working Paper
Popis:	We investigate the capability of the UBVRIJHK photometric system to quantify star clusters in terms of age, metallicity and color excess by their integrated photometry in the framework of PEGASE single stellar population (SSP) models. The age-metallicity-extinction degeneracy was analyzed for various parameter combinations, assuming different levels of photometric accuracy. We conclude, that most of the parameter degeneracies, typical to the UBVRI photometric system, are broken in the case when the photometry data are supplemented with at least one infrared magnitude of the JHK passbands, with an accuracy better than ~0.05 mag. The presented analysis with no preassumptions on the distribution of photometric errors of star cluster models, provides estimate of the intrinsic capability of any photometric system to determine star cluster parameters from integrated photometry. Comment: 13 pages, 11 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0902.3167 Zobrazit plný text záznamu View this record from Arxiv