BVR PHOTOMETRY OF SUPERGIANT STARS IN HOLMBERG II

Y.-J. Sohn; S. W. Chang; D.-Y. Kim; J.-W. Kim; S.-H. Kim; J.-E. Lee; J. G. Lee; J.-M. Lee; M.-Y. Lee; S.-Y. Lee; U.S. Lee; B.-K. Park; H.E. Park; I.-K. Park; W H. Park; H.-S. Yi; J.-Y. Yoon

doi:10.5140/JASS.2006.23.1.001

Journal of Astronomy and Space Sciences (Mar 2006)

Affiliations

Y.-J. Sohn: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
S. W. Chang: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
D.-Y. Kim: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
J.-W. Kim: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
S.-H. Kim: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
J.-E. Lee: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
J. G. Lee: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
J.-M. Lee: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
M.-Y. Lee: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
S.-Y. Lee: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
U.S. Lee: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
B.-K. Park: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
H.E. Park: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
I.-K. Park: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
W H. Park: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
H.-S. Yi: Department of Astronomy, Yonsei University, Seoul 120-749, Korea
J.-Y. Yoon: Department of Astronomy, Yonsei University, Seoul 120-749, Korea

DOI: https://doi.org/10.5140/JASS.2006.23.1.001
Journal volume & issue: Vol. 23, no. 1
pp. 1 – 10

Abstract

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We report the photometric properties in BVR bands for the resolved bright supergiant stars in the dwarf galaxy Holmberg II. The color-magnitude diagrams and color-color diagram of 374 resolved stars indicate that the majority of the member stars are supergiant stars with a wide range of spectral type between B-K. A comparison with theoretical evolutionary tracks indicates that the supergiant stars in the observed field have progenitor masses between ~10M_⨀ and 20M_⨀. The exponent of luminosity function in V is in good agreement with those of the Small and Large Magellanic Clouds.

Published in Journal of Astronomy and Space Sciences

ISSN: 2093-5587 (Print); 2093-1409 (Online)
Publisher: The Korean Space Science Society
Country of publisher: Korea, Republic of
LCC subjects: Science: Astronomy
Website: http://janss.kr

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