The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 41 Issue 2
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- Pages.62.1-62.1
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- 2016
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- 1226-2692(pISSN)
Near-infrared photometric properties of red-supergiant stars in nearby galaxies : NGC 4214, NGC 4736, and NGC 5194 / NGC 5195
- Jung, DooSeok (Department of Astronomy, Yonsei University) ;
- Chun, San-Hyun (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
- Choudhury, Samyaday (Yonsei University Observatory) ;
- Sohn, Young-Jong (Department of Astronomy, Yonsei University)
- Published : 2016.10.12
Abstract
We study the near-infrared photometric properties of red-supergiant stars (RSGs) in three nearby galaxies located within 15 Mpc: NGC 4214, NGC 4736 and NGC 5194 / NGC 5195. The near-infrared (JHK) imaging data were obtained using the WFCAM detector mounted on UKIRT telescope in Hawaii. We used the DAOPHOT/ALLSTAR pacakge to carry out the photometry. We applied MARCS synthetic fluxes to estimate the effective temperatures and luminosities of the RSGs in all the three galaxies. The results were plotted in the Hertzsprung-Russell(H-R) diagram along with the theoretical evolutionary tracks with different masses. We explore the spatial correlation between the RSGs and H II regions by examing the H-R diagram of the RSGs in the dominant H II regions for each of these three galaxies.
Keywords