Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
권호 표지
DOI QR코드

DOI QR Code

The JHKS Magnitudes of the Red Giant Branch Tip and the Distance Moduli of Nearby Dwarf Galaxy NGC 205

  • Jung, M.Y. (Department of Astronomy, Yonsei University) ;
  • Chun, S.H. (Department of Astronomy, Yonsei University) ;
  • Chang, C.R. (Department of Astronomy, Yonsei University) ;
  • Han, M. (Department of Astronomy, Yonsei University) ;
  • Lim, D. (Department of Astronomy, Yonsei University) ;
  • Han, W. (Korea Astronomy and Space Science Institute) ;
  • Sohn, Y.J. (Department of Astronomy, Yonsei University)
  • Published : 2009.12.15
Download PDF
⟨ Previous Next ⟩

Abstract

We have used the near-infrared $JHK_S$ photometric data of resolved stars in a nearby dwarf elliptical galaxy NGC 205 to determine the magnitudes of the red giant branch tip (TRGB). By applying Savitzky-Golay filter to the observed luminosity functions (LFs) in each band, we derived the second derivatives of the LFs so as to determine the magnitudes of the TRGB. Absolute magnitudes of the TRGB in $JHK_S$ bands were measured from the Yonsei-Yale isochrones. By comparing the determined apparent magnitudes and the theoretical absolute magnitudes of the TRGB, we estimated the distance moduli of NGC 205 to be (m - M) = $24.10{\pm}0.08$, $24.08{\pm}0.12$ and $24.14{\pm}0.14$ in J, H, and $K_S$ bands, respectively.

Keywords

References

  1. Bellazzini, M., Ferraro, F. R., Sollima, A., Pancino, E., & Origlia, L. 2004, A&A, 424, 199 https://doi.org/10.1051/0004-6361:20035910
  2. Butler, D. J., Martinez-Delgado, D. 2005, AJ, 129, 2217 https://doi.org/10.1086/429524
  3. Ciardullo, R., Jacoby, G. H., Ford, H. C., & Neill, J. D. 1989, ApJ, 339, 53 https://doi.org/10.1086/167275
  4. Cioni, M.-R. L. & Habing, H. J. 2005, A&A, 429, 837 https://doi.org/10.1051/0004-6361:20041608
  5. Cioni, M.-R. L., van der Marel, R. P., Loup, C., & Habing, H. J. 2000, A&A, 359, 601
  6. Da Costa, G. S. & Armandroff, T. E. 1990, AJ, 100, 162 https://doi.org/10.1086/115500
  7. Jung, M. Y. 2009, Master of Science Thesis, Yonsei University
  8. Kang, A., Kim, J.-W., Shin, I.-G., Chun, S.-H., Kim., H.-I., & Sohn, Y.-J, 2007, JA&SS, 24, 203
  9. Kim, Y. -C., Demarque, P., Yi, S. K., & Alexander, D. R. 2002, ApJS, 143, 499 https://doi.org/10.1086/343041
  10. Lee, M. G., Freedman, W. L., & Madore, B. F. 1993, ApJ, 417, 553 https://doi.org/10.1086/173334
  11. McConnachie, A.W., Irwin, M. J., Ferguson, A. M. N., Ibata, R. A., Lewis, G. F., & Tanvir, N. 2004, MNRAS, 350, 243 https://doi.org/10.1111/j.1365-2966.2004.07637.x
  12. Montegriffo, P., Ferraro, F. R., Fusi Pecci, F., & Origlia, L. 1995, MNRAS, 276, 739 https://doi.org/10.1093/mnras/276.3.739
  13. Mould, J., Kristian, J., & Da Costa, G. S. 1984, ApJ, 278, 575 https://doi.org/10.1086/161824
  14. Saha, A., Hoessel, J. G., & Krist, J. 1992, AJ, 103, 84 https://doi.org/10.1086/116043
  15. Salaris, M. & Cassisi, S. 1998, MNRAS, 298, 166 https://doi.org/10.1046/j.1365-8711.1998.01598.x
  16. Schlegel, D., Finkbeiner, D., & Davis, M. 1998, ApJ, 500, 525 https://doi.org/10.1086/305772
  17. Sohn, Y.-J., Kang, A., Han, W., Park, J.-H., Kim, H.-I., Kim, J.-W., Shin, I.-G., & Chun, S.-H. 2008a, JA&SS, 25, 245
  18. Sohn, Y.-J., Kang, A., Han, W., Park, J.-H., Kim, H.-I., Kim, J.-W., Shin, I.-G., & Chun, S.-H. 2008b, JA&SS, 25, 249
  19. Stetson, P. B. 1987, PASP, 99, 191 https://doi.org/10.1086/131977
  20. Stetson, P. B. & Harris, W. E. 1988, AJ, 96, 909 https://doi.org/10.1086/114856
  21. Yi, S. K., Kim, Y. -C., & Demarque, P. 2003, ApJS, 144, 259 https://doi.org/10.1086/345101