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Constraints on Elliptical Galaxy Formation from Dry Mergers

Published online by Cambridge University Press:  01 August 2006

Julia M. Comerford ,
Eliot Quataert  and
Chung-Pei Ma
Julia M. Comerford
Affiliation:
Astronomy Department, 601 Campbell Hall, University of California, Berkeley, CA 94720 email: julie@astro.berkeley.edu
Eliot Quataert
Affiliation:
Astronomy Department, 601 Campbell Hall, University of California, Berkeley, CA 94720 email: julie@astro.berkeley.edu
Chung-Pei Ma
Affiliation:
Astronomy Department, 601 Campbell Hall, University of California, Berkeley, CA 94720 email: julie@astro.berkeley.edu
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Recent observations suggest that dissipationless mergers of elliptical galaxies build up the population of massive early-type galaxies (Bell et al. 2004; Faber et al. 2006). This type of merger is observed in galaxy clusters (Tran et al. 2005) and predicted by semi-analytic models which find mass assembly times significantly later than star-formation times for the most massive elliptical galaxies (de Lucia & Blaizot 2006). Here, we use a semi-analytic model of minor mergers of dark matter halos to examine the role of dry minor mergers in elliptical galaxy formation.

References

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