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http://dx.doi.org/10.5140/JASS.2007.24.3.203

NEAR-IR TRGB DISTANCE TO DWARF ELLIPTICAL GALAXY NGC 147  

Kang, A. (Department of Astronomy, IEAA, Yonsei University)
Kim, J.W. (Department of Astronomy, IEAA, Yonsei University)
Shin, I.G. (Department of Astronomy, IEAA, Yonsei University)
Chun, S.H. (Department of Astronomy, IEAA, Yonsei University)
Kim, H.I. (Korea Astronomy and Space Science Institute)
Sohn, Y.J. (Department of Astronomy, IEAA, Yonsei University)
Publication Information
Journal of Astronomy and Space Sciences / v.24, no.3, 2007 , pp. 203-208 More about this Journal
Abstract
We report the distance modulus of nearby dwarf elliptical galaxy NGC 147 estimated from the Tip of Red-giant Branch (TRGB) method applying to the color-magnitude diagrams and luminosity functions in the near-infrared JHK bands. Apparent magnitudes of TRGBs in each band are obtained by applying Savitzky-Golay filter to the luminosity functions, and the theoretical absolute magnitudes are estimated from Yonsei-Yale isochrones. The derived values of distance modulus to NGC 147 are $(m-M)=23.69{\pm}0.12,\;23.78{\pm}0.17,\;and\;23.85{\pm}0.22\;for\;J,\;H,\;and\;K$ bands, respectively. Distance modulus in bolometric magnitude is also derived as $(m-M)=23.87{\pm}0.11$. We compare the derived values of the TRGB distance modulus to NGC 147 in the near-infrared bands with the previous results in other bands.
Keywords
TRGB; distance modulus; near-infrared; NGC 147;
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