Abstract
We use semi-analytical modelling of galaxy formation to predict the mix of elliptical galaxies with boxy and disky isophotes, assuming they originated from major mergers of different mass ratios. Numerical simulations of merging spiral galaxies indicate equal mass mergers leading to boxy and merger with a mass ratio of 3:1 to disky ellipticals. Assigning isophotal shapes to elliptical galaxies in our model we find bright disky ellipticals being as frequent or more frequent as bright boxy ellipticals, in contrast to observations which indicate that most of the bright ellipticals should be boxy. The precursors of bright ellipticals in our model are mainly also ellipticals which merge with each other later. Assuming that the merger of two ellipticals results in boxy ellipticals increases the fraction of bright boxy ellipticals. By defining a disky as a bulge dominated galaxy with an additional disk mass of more than 20 % the total baryonic mass, increases the fraction of low mass disky ellipticals and reproduces the observed trend of a steep increase in the fraction of low mass disky ellipticals.
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References
Bender, R., Burstein, D. and Faber, S.M.: 1992, ApJ 399, 462–477.
Bond, J.R., Cole, S., Efstathiou, G. and Kaiser, N.: 1991, ApJ 379, 440–460.
Fasano, G., Poggianti, B.M., Couch, W.J., Bettoni, D., Kjærgaard, P. and Moles, M.: 2000, ApJ 542, 673–683.
Kauffmann, G., White, S.D.M. and Guiderdoni, B.: 1993, MNRAS 264, 201–218.
Naab, T., Burkert, A. and Hernquist, L.: 1999, ApJ 523, L133–L136.
Simien, F. and de Vaucouleurs, G.: 1986, ApJ 302, 564–578.
Somerville, R.S. and Kolatt, T.S.: 1999, MNRAS 305, 1–14.
Springel, V., White, S.D.M., Tormen, G. and Kauffmann, G.: 2001, MNRAS 328, 726–750.
Trentham, N.: 1998, MNRAS 294, 193+.
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Khochfar, S., Burkert, A. (2003). Ellipticals with Disky and Boxy Isophotes in High Density Environments. In: Lobo, C., Serote Roos, M., Biviano, A. (eds) Galaxy Evolution in Groups and Clusters. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0107-6_28
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DOI: https://doi.org/10.1007/978-94-010-0107-6_28
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3975-8
Online ISBN: 978-94-010-0107-6
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