Formation of Slowly Rotating Elliptical Galaxies in Major Mergers. A Resolution Study

Bois, M.; Bournaud, F.; Emsellem, E.; Alatalo, K.; Blitz, L.; Bureau, M.; Cappellari, M.; Davies, R. L.; Davis, T. A.; de Zeeuw, P. T.; Falcón-Barroso, J.; Khochfar, S.; Krajnović, D.; Kuntschner, H.; Lablanche, P.-Y.; McDermid, R. M.; Morganti, R.; Naab, T.; Sarzi, M.; Scott, N.; Serra, P.; van den Bosch, R. C. E.; van de Ven, G.; Weijmans, A.; Young, L. M.
Bibliographical reference

HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conference Proceedings, Volume 1240, pp. 405-406 (2010).

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We study resolution effects in numerical simulations of gas-rich (20% of the total baryonic mass) major mergers, and show that the formation of slowly-rotating elliptical galaxies requires a resolution that is beyond the present-day standards to be properly modelled. Our findings show that a high-enough resolution is required to accurately model the global properties of merger remnants and the evolution of their angular momentum. The role of wet mergers of spiral galaxies in the formation of slow-rotating ellipticals may therefore have been underestimated.