Journal of Astronomy and Space Sciences

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

DOI QR Code

RED GIANT BRANCH OF THE METAL POOR GLOBULAR CLUSTERS: II. BUMP, TIP, AND DISTANCE OF NGC 1904

  • Kim J.W. (Department of Astronomy, Yonsei University) ;
  • Choi Y. (Department of Astronomy, Yonsei University) ;
  • Chun S.H. (Department of Astronomy, Yonsei University) ;
  • Jung J. (Department of Astronomy, Yonsei University) ;
  • Kang A. (Department of Astronomy, Yonsei University) ;
  • Sohn Y.J. (Department of Astronomy, Yonsei University)
  • Published : 2006.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

From the BV images of the metal-poor globular cluster NGC 1904 obtained with the 2K CCD camera equipped on the BOAO 1.8m telescope, we construct (B - V, V) color-magnitude diagram of the cluster. The apparent V magnitudes of the RGB bump and tip have been measured from the luminosity function of the iteratively selected RGB stars in NGC 1904. Theoretical absolute $M_v$ magnitudes of the RGB bump and tip are estimated using the Yonsei-Yale isochrones. The distance modulus of NGC 1904 has been derived by comparing the observed apparent V magnitude with the estimated absolute $M_v$ magnitude of the RGB bump and tip.

Keywords

References

  1. Alcaino, G. 1976, A&AS, 26, 353
  2. Alcaino, G., Liller, W., Alvarado, E, & Wenderoth, E. 1994, AJ, 107,230 https://doi.org/10.1086/116846
  3. Bellazzini, M., Ferraro, F. R., & Pancino, E. 2001, ApJ, 556, 635 https://doi.org/10.1086/321613
  4. Carreta, E.& Gratton, R. G. 1997, A&AS, 121, 95 https://doi.org/10.1051/aas:1997116
  5. Cho, D. -H. & Lee, S. -G. 2002, AJ, 124,977 https://doi.org/10.1086/341375
  6. Fabbian, D., Recio-Blanco, A., Gratton, R. G., & Piotto, G. 2005, A&A, 434, 235 https://doi.org/10.1051/0004-6361:20035862
  7. Ferrarese, L., Ford, H. C. Huchra, J., Kennicutt, R. C, Mould, J. R., Sakai, S., Freedman, W. L., Stetson, P. B., Madore, B. F., Gibson, B. K., Graham, J. A., Hughes, S. M., Illingworth, G. D., Kelson, D. D., Macri, L., Sebo, K., & Silbermann, N.A. 2000a, ApJS, 128, 431 https://doi.org/10.1086/313391
  8. Ferrarese, L., Mould, J. R., Kennicutt, R. C., Huchra, J., Ford, H. C., Freedman, W. L., Stetson, P. B., Madore, B. F, Sakai, S., Gibson, B. K., Graham, J. A., Hughes, S. M., Illingworth, G. D., Kelson, D. D., Macri, L., Sebo, K., & Silbermann, N.A. 2000b, ApJ, 529, 745 https://doi.org/10.1086/308309
  9. Ferraro, E R., Clementini, G., Fusi Pecci, F, Sortino, R., & Buonanno, R. 1992, MNRAS, 256, 391 https://doi.org/10.1093/mnras/256.3.391
  10. Ferraro, E. R., Messineo, M., Fusi Pecci, F., De Palo, M. A., Straniero, O., Chieffi, A., & Limongi, M. 1999, AJ, 118, 1738 https://doi.org/10.1086/301029
  11. Fusi Pecci, E, Ferraro, E R., Crocker, D. A., Rood, R. T., & Buonanno, R. 1990, A&A, 238, 95
  12. Goranskij, V. P. 1976, Astr. Tsirk., 902, 5
  13. Harris, W. E. 1996, AJ, 112, 1487 https://doi.org/10.1086/118116
  14. Harris, W. E., Hesser, J. E., & Atwood, B. 1983, PASP, 95, 951 https://doi.org/10.1086/131274
  15. Heasley, J. N., Janes, K. A., & Christian, C. A. 1986, AJ, 91, 1108 https://doi.org/10.1086/114087
  16. Iben, I. Jr. 1968, Nature, 220, 143 https://doi.org/10.1038/220143a0
  17. Kim, Y. -C., Demarque, P., Yi, S. K., & Alexander, D. R. 2002, ApJS, 143, 499 https://doi.org/10.1086/343041
  18. King, C. R., Da Costa, G. S., & Demarque, P. 1985, ApJ, 299, 67 https://doi.org/10.1086/184582
  19. Kraft, R. P. & Ivans, I. I. 2003, PASP, 115, 143 https://doi.org/10.1086/345914
  20. Kravtsov, V., Ipatov, A., Samus, N., Alcaino, G., Liller, W., & Alvarado, F. 1997, A&AS, 125, 1 https://doi.org/10.1051/aas:1997210
  21. Landolt, A. U. 1992, AJ, 104, 340 https://doi.org/10.1086/116242
  22. Lee, M. G., Freedman, W. L., & Madore, B. F. 1993, ApJ, 417, 553 https://doi.org/10.1086/173334
  23. Madore, B. F. & Freedman, W. L. 1995, AI, 109, 1645
  24. Salaris, M. & Girardi, L. 2005, MNRAS, 357, 669 https://doi.org/10.1111/j.1365-2966.2005.08689.x
  25. Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525 https://doi.org/10.1086/305772
  26. Y.-J., Kim, J. - W., & Kang, A. 2006, submitted to JA&SS
  27. Stetson, P. B. 1987, PASP, 99, 191 https://doi.org/10.1086/131977
  28. Stetson, P. B. 1990, PASP, 102, 932 https://doi.org/10.1086/132719
  29. Stetson, P. B. 1992, in IAU Colloq. 136, Stellar Photometry: Current Techniques and Future Devel-opments, eds. C. J. Butler & I. Elliot (Cambridge: Cambridge Univ. Press), p.291
  30. Stetson, P. B. & Harris, W. E. 1977, AJ, 82, 954 https://doi.org/10.1086/112154
  31. Stetson, P. B. & Harris, W. E. 1988, AJ, 96, 909 https://doi.org/10.1086/114856
  32. Straniero, O., Chieffi, A., & Limongi, M. 1997, ApJ, 490, 425 https://doi.org/10.1086/304879
  33. Thomas, H. -C. 1967, Z. Astrophys., 67, 420
  34. Valenti, E., Orig1ia, L., & Ferraro, F. R. 2005, MNRAS, 361, 272 https://doi.org/10.1111/j.1365-2966.2005.09173.x
  35. VandenBerg, D. A. & Bell, R. A. 1985, ApJS, 58, 561 https://doi.org/10.1086/191052
  36. Walker, A, R. 2003, in Stellar candles for the extragalactic distance scale, eds. D. Alloin, & W. Gieren (New York: Springer), Lect. Notes Phys., 635, 265 https://doi.org/10.1007/978-3-540-39882-0_14
  37. Yi, S. K., Kim, Y. -C., & Demarque, P. 2003, ApJS, 144, 259 https://doi.org/10.1086/345101
  38. Zinn, R. & West, M. J. 1984, ApJS, 55, 45 https://doi.org/10.1086/190947