Abstract
We present first results of a comprehensive survey of deep long-slit spectra along the minor axis of bulges of edge-on spiral galaxies. Our results indicate that stellar populations in bulges are fairly old and encompass a range of metallicities. The luminosity-weighted ages of bulges range from those found for cluster ellipticals to slightly `younger' (by up to only a few Gyr, however). Their α/Fe element ratio is typically supersolar, consistent with those found in giant ellipticals. The radial line-strength gradients in bulges correlate with bulge luminosity. Generally, these findings are more compatible with predictions of the `dissipative collapse' model than with those of the `secular evolution' model.
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References
Arimoto, N. and Yoshii, Y.: 1987, Astron. Astrophys. 173, 23.
Arimoto, N. and Jablonka, P.: 1992, Astron. Astrophys. 249, 374.
Balcells, M. and Peletier, R.F.: 1994, Astron. J. 107, 135.
Bender, R., Burstein, D. and Faber, S.M.: 1992, Astrophys. J. 399, 462.
Carlberg, R.G.: 1984, Astrophys. J. 286, 403.
Carollo, C.M., Danziger, I.J. and Buson, L.M.: 1993, Mon. Not. R. Astron. Soc. 265, 553.
Combes, F., Debbasch, F., Friedli, D. and Pfenniger, D.: 1990, Astron. Astrophys. 233, 82.
Friedli, D.: 1998, in: D. Friedli et al. (eds.), ASP Conf. Ser. 147, Abundance Profiles: Diagnostic Tools for Galaxy History. ASP, San Francisco, p. 287
Friedli, D. and Benz, W.: 1995, Astron. Astrophys. 310, 649.
Friedli, D., Benz, W. and Kennicutt, R.: 1994, Astrophys. J. 430, L105.
González, J.J.: 1993, Ph.D. thesis, University of California, Santa Cruz.
González, J.J. and Gorgas, J.: 1996, in: A. Buzzoni, A. Renzini and A. Serrano (eds.), ASP Conf. Ser. 86, Fresh Views on Elliptical Galaxies, ASP, San Francisco, p. 225.
Gorgas, J., Faber, S.M., Burstein, D., et al.: 1993, Astrophys. J. Suppl. 86, 153.
Goudfrooij, P. and Emsellem, E.: 1996, Astron. Astrophys. 306, L45.
Jablonka, P., Martin, P. and Arimoto, N.: 1996, Astron. J. 112, 1415.
Jones, L.A. and Worthey, G.: 1995, Astrophys. J. 446, L31.
Kobayashi, C. and Arimoto, N.: 1999, Astrophys. J., in press (astro-ph/9907091).
Kuntschner, H. and Davies, R.L.: 1998, Mon. Not. R. Astron. Soc. 295, L39 (KD98).
Martin, P. and Roy, J.-R.: 1994, Astrophys. J. 426, 601.
Osterbrock, D.E.: 1974, Astrophysics of Gaseous Nebulae, W.H. Freeman & Co., San Francisco.
Pfenniger, D. and Norman, C.: 1990, Astrophys. J. 363, 391.
Sellwood, J.A. and Wilkinson, A.: 1993, Rep. Prog. Phys. 56, 173.
Terndrup, D.M., Davies, R.L., Frogel, J.A., et al.: 1994, Astrophys. J. 432, 518.
Vila-Costas, M.B. and Edmunds, M.G.: 1992, Mon. Not. R. Astron. Soc. 259, 121.
Vazdekis, A., Casuso, E., Peletier, R.F. and Beckman, J.E.: 1996, Astrophys. J. Suppl. 106, 307.
Weiss, A., Peletier, R.F. and Matteucci, F.: 1995, Astron. Astrophys. 296, 73.
Worthey, G.: 1994, Astrophys. J. Suppl. 95, 107 (W94).
Worthey, G., Faber, S.M. and González, J.J.: 1992, Astrophys. J. 398, 69.
Worthey, G. and Ottoviani, D.L.: 1997, Astrophys. J. Suppl. 111, 377.
Zaritsky, D., Kennicutt, R.C. and Huchra, J.P.: 1994, Astrophys. J. 420, 87.
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Goudfrooij, P., Gorgas, J. & Jablonka, P. Line Strengths and Line Strength Gradients in Bulges along the Hubble Sequence. Astrophysics and Space Science 269, 109–116 (1999). https://doi.org/10.1023/A:1017015808447
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DOI: https://doi.org/10.1023/A:1017015808447