BVR PHOTOMETRY OF SUPERGIANT STARS IN HOLMBERG II

• Published in: Journal of astronomy and space sciences Vol. 23; no. 1; pp. 1 - 10
• Main Authors: Sohn, Y.J., Chang, S.W., Kim, D.Y., Kim, J.W., Kim, S.H., Lee, J.E., Lee, J.G., Lee, J.M., Lee, M.Y., Lee, S.Y., Lee, U.S., Park, B.K., Park, H.E.
• Format: Journal Article
• Language: English
• Published: 한국우주과학회 01.03.2006; The Korean Space Science Society
• Subjects: dwarf galaxy: Holmberg II; Photometry; supergiant stars; 천문학; dwarf galaxy; Holmberg II; photometry; supergiant stars
• ISSN: 2093-5587; 2093-1409
• DOI: 10.5140/JASS.2006.23.1.001

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.