• Sohn, Young-Jong (Center for Space Astrophysics, Yonsei University) ;
  • Rhee, Myung-Hyun (Center for Space Astrophysics, Yonsei University) ;
  • Yoon, Suk-Jin (Center for Space Astrophysics, Yonsei University, Department of Astronomy, Yonsei University)
  • 발행 : 1999.12.01


Archival long-slit spectra, covering the wavelength range 4050~5150$\AA$, have been used to investigate the radial behavior of absorption line features (G4300, Fe4383, Ca4455, Fe44531, Fe4668, and H$\beta$) of an eliptical galaxy NGC 5322. The heliocentric recession velocity of NGC 5322 has been derived as 1888$\pm$51kms-1. Metallic absorption lines of NGC 5322 show significant radial gradients through the major axis. The minor axis shows much smaller radial metal line gradients than the major axis. The minor axis shows much smaller radial metal line gradients than the major axis. The mean slopes of Fe line gradients to the major and minor axes of NGC 5322 were estimated as -0.433$\pm$0.064 and -0.242$\pm$0.096, respectively. Significant radial gradients of H$\beta$ absorption of NGC 5322 are also detected both on the major and minor axes. It is shown that the radial metallicity gradients in NGC 5322 are smaller than expected in a simple dissipative collapse model. Rather, dissipationless collapse, such as hierarchical merhing, could have contributed during the initial stage of the galaxy formation.



  1. ApJ v.286 Carlberg, R. G.
  2. AJ v.96 Couture, J.;Hardy, E.
  3. IAU Symp. v.164 Stellar Populations Ferguson, H. C.;P. C. van der Kruit(ed.);G. Gilmore(ed.)
  4. ApJS v.95 Worthey, G.
  5. ApJ v.481 Carollo, C. M.;Franx, M.;Illingworth, G. D.;Forbes, D. A.
  6. AJ v.100 Peletier, R. F.;Davies, R. L.;Illingworth, G. D.;Davis, L. E.;Cawson, M.
  7. PASP v.96 Caldwell, N.
  8. BAAS Lee, Y. W.;Lee, H. C.;Yoon, S. J.
  9. ApJ v.201 Gott, J. R.
  10. AJ v.90 Phillips, M. M.;Kenkins, C. R.;Dopita, M. A.;Sadler, E. M.;Binnette, L.
  11. IAU Symp. v.149 The Stellar Populations of Galaxies Faber, S. M.;Worthey, G.;Gonzalez, J. J.
  12. ApJS v.57 Faber, S. M.;Friel, E. D.;Burstein, D.;Gaskell, C. M.
  13. ApJ v.487 Ho, L. C.;Filippenko, A. V.;Sargent, W. W.
  14. ApJS v.107 Maoz, D.;Filippenko, A. V.;Ho, L. C.;Macchetto, D.;Rix, H. W.;Schneider, D. P.
  15. IAU Symp. v.164 Stellar Populations Faber, S. M.;Trager, S. C.;Gonzalez, J. J.;Worthey, G.;P.C. van der Kruit(ed.);G. Gilmore(ed.)
  16. ApJ v.206 Tinsley, B. M.;Gunn, J. E.
  17. AJ v.110 Lauer, T. R.
  18. Third Reference Catalog of Bright Galaxies de Vaucouleurs, G.;de Vaucouleurs, A.;Corwin, H. G.;Buta, R. J.;Paturel, G.;Fouque, P.
  19. MNRAS v.245 Gorgas, J.;Efstathiou, G.;Salamanca, A. A.
  20. CFHT Info. Bull. v.19 Beland, S.;Boulade, O.;Davidge, T. J.
  21. A&AS v.104 Goudfrooij, P.;Hansen, L.;Jorgensen, H. E.;Norgaard-Nielsen, H. U.;de Jong, T.;van den Hoek, L. B.
  22. MNRAS v.176 Larson, R. B.
  23. The Evolution of Galaxies and Stellar Populations Faber, S. M.
  24. AJ v.103 Delisle, S.;Hardy, E.
  25. AJ v.103 Davidge, T. J.
  26. AJ v.107 Davidge, T. J.;Clark, C. C.
  27. ApJS v.94 Worthey, G.;Faber, S. M.;Gonzalez, J. J.;Burstein, D.
  28. PASP v.97 Burstein, D.
  29. ApJ v.398 Worthey, G.;Faber, S. M.;Gonzalez, J. J.
  30. AJ v.101 Boronson, T. A.;Thompson, I.B.
  31. MNRAS v.253 White, S. D. M.
  32. MNRAS v.262 Davies, R. L.;Sadler, E. M.;Peletier, R. F.
  33. ApJ v.287 Burstein, D.;Faber, S. M.;Gaskell, C. M.;Krumm, N.