The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 40 Issue 1
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- Pages.70.4-70.4
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- 2015
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- 1226-2692(pISSN)
Distance and Reddening of NGC 6791 using Empirically Calibrated Isochrones
- An, Deokkeun (Ewha Womans University) ;
- Terndrup, Donald M. (Ohio State University) ;
- Pinsonneault, Marc H. (Ohio State University) ;
- Lee, Jaewoo (Sejong University)
- Published : 2015.04.10
Abstract
Although the theory of stellar structure and evolution is considered one of the most successful developments in astrophysics, there still remains a significant mismatch between theoretical stellar models and the observed main sequence of the best studied nearby open clusters. To ease the tension, empirical corrections to the color-temperature transformations are used as a simple, but practical way of overcoming the difficulty than directly examining stellar atmosphere models that have large theoretical complexities and uncertainties. I will describe our continuing effort to calibrate stellar isochrones using cool main-sequence stars in Praesepe, complementing our previous work based on the Hyades and the Pleiades, and provide an extensive test of our models using photometry of cool and metal-rich main-sequence stars in NGC 6791. Finally, I will discuss the implication of our results on the mass loss in NGC 6791.
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