Accuracy of Star Cluster Parameters from Integrated UBVRI Photometry
D. Narbutis, A. Bridzius, R. Stonkute, V. Vansevicius (Inst. of, Physics, Lithuania)
TL;DR
This paper evaluates how effectively the UBVRI photometric system can determine star cluster properties like age, metallicity, and extinction from integrated photometry, highlighting the importance of high photometric accuracy.
Contribution
It analyzes the age-metallicity-extinction degeneracy in UBVRI photometry and establishes accuracy thresholds for reliable parameter estimation.
Findings
UBVRI can estimate cluster parameters with accuracy better than ~0.03 mag.
The age-metallicity-extinction degeneracy impacts parameter determination.
High photometric precision is crucial for accurate star cluster analysis.
Abstract
We study the capability of the UBVRI photometric system to quantify star clusters in terms of age, metallicity, and color excess by their integrated photometry. The well known age-metallicity-extinction degeneracy was analyzed for various parameter combinations, assuming different levels of photometric accuracy. We conclude that the UBVRI photometric system enables us to estimate star cluster parameters over a wide range, if the overall photometric accuracy is better than ~0.03 mag.
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Taxonomy
TopicsAstronomical Observations and Instrumentation · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research