Summary
Hierarchical assembly of early-type galaxies (Es and S0s) over an extended period of time will result in mixed-generation stellar populations. Here we look for signatures of composite populations in broad-band, near-ultraviolet (2500-3400 Å), high-resolution HST imaging of the cores of 12 bright early-type galaxies without obvious dust or active galactic nuclei. Near-UV imaging is a sensitive probe for the detection of younger components with ages in the range of 10 Myr to 5 Gyr. Only two galaxies have central colors (r< 0.75 re) that are consistent with a single-generation population. The other ten require a composite population.
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References
Byun, Y.-I, et al. 1996, AJ, 111, 1889
deVaucouleurs, G., et al. 1991, Third Reference Catalogue of Bright Galaxies, 3rd ed (Springer Verlag, New York)
Dressler, A., & Gunn, J. E. 1983, ApJ, 270, 7
Fioc, M., & Rocca-Volmerange, B. 1997, A&A, 326, 950
Hibbard, J. E., & Yun, M., 1999, ApJL, 522, 93
Menanteau, F., et al. 2001, MNRAS, 322, 1
Mihos, J. C., & Hernquist, L. E. 1994, ApJL, 437, 47
Negroponte, J., & White, S. D. M. 1983, MNRAS, 205, 1009
Norton, S., et al. 2001, ApJ, 557, 150
Ostriker, J. P. 1980, Comments Astrophys, 8, 177
Ravindranath, S., et al. 2001, AJ, 122, 653
Rest, A., et al. 2001, AJ, 121, 2431
Rothberg, B., & Joseph, R. 2004, AJ, 128, 2098
Salpeter, E. 1955, ApJ, 121, 161
Schweizer, F. 1982, ApJ, 252, 455
Schweizer, F., & Seitzer, P. 1992, AJ, 104, 1039
Springel, V. 2000, MNRAS, 312, 859
Toomre, A., & Toomre, J. 1972, ApJ, 178, 623
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Martin, J.R., O’Connell, R.W., Hibbard, J.E. (2009). Near-UV Merger Signatures in Early-Type Galaxies. In: New Quests in Stellar Astrophysics II. Astrophysics and Space Science Proceedings. Springer, New York, NY. https://doi.org/10.1007/978-0-387-87621-4_11
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DOI: https://doi.org/10.1007/978-0-387-87621-4_11
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