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“E+A” Galaxies: Environment and Evolution

Published online by Cambridge University Press:  25 May 2016

Ann I. Zabludoff
Ann I. Zabludoff*
Affiliation:
UCO/Lick Observatory and University of California, Santa Cruz, CA, USA

Extract

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One important approach to the study of galaxy evolution is to identify those galaxies whose spectral and/or morphological characteristics suggest that they are in transition. For example, “E+A” galaxies, which have strong Balmer absorption lines and no significant [OII] emission, are generally interpreted as post-starburst galaxies in which the star formation ceased within the last ~ Gyr (Fig. 1). This transition between a star forming and non-star forming state is a critical link in any galaxy evolution model in which a blue, star forming disk galaxy evolves into a SO or elliptical. Another possible evolutionary track is that the star formation in an “E+A” resumes at some later time, if enough gas remains in the galaxy after its starburst ends. Given this ambiguity, it is important to investigate (1) the environment's role in “E+A” evolution, (2) the stellar and gas morphologies of “E+A”s, (3) the likely progenitors of “E+A”s, and (4) how common the “E+A” phase is in the evolution of galaxies.

Type
Tidal Interactions
Information
Symposium - International Astronomical Union , Volume 186: Galaxy Interactions at High and Low Redshift , 1999 , pp. 125 - 131
Copyright
Copyright © Kluwer 1999 

References

Bower, R. (1991), MNRAS, 248, 332 CrossRefGoogle Scholar
Broadhurst, T.J., Ellis, R.S. & Shanks, T. (1988), MNRAS, 235, 827 Google Scholar
Bruzual, A. G., & Chariot, S. (1993), ApJ, 405, 538 Google Scholar
Butcher, H.R. & Oemler, A. (1978), ApJ, 219, 18 Google Scholar
Franx, M. (1993), ApJL, 407, L5 CrossRefGoogle Scholar
Hibbard, J.E., & Mihos, J.C. (1995), AJ, 110, 140 CrossRefGoogle Scholar
Kauffmann, G. (1995), MNRAS, 274, 153 Google Scholar
Lacey, C. & Cole, S. (1993), MNRAS, 262, 627 Google Scholar
Lilly, S.J., Tresse, L., Hammer, F., Crampton, D., & Le Fevre, O. (1995), ApJ, 455, 108 CrossRefGoogle Scholar
Mihos, J.C., & Hernquist, L. (1994), ApJ, 431, 9 CrossRefGoogle Scholar
Schweizer, F. (1982), ApJ, 252, 455 Google Scholar
Schweizer, F. (1996), AJ, 111, 109 CrossRefGoogle Scholar
Shectman, S.A., Landy, S.D., Oemler, A., Tucker, D.L., Lin, H., Kirshner, R.P., & Schechter, P.L. (1996), ApJ, 470, 172.Google Scholar
Tucker, D.L., (1994), , Yale University.Google Scholar
Zabludoff, A.I., Zaritsky, D., Lin, H., Tucker, D., Hashimoto, Y., Shectman, S.A., Oemler, A., & Kirshner, R.P. (1996), ApJ, 466, 104.Google Scholar