AAS 205th Meeting, 9-13 January 2005
Session 31 Evolution of Ellipticals and Dark Matter Halos
Oral, Monday, January 10, 2005, 10:00-11:30am, California

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[31.06] Massive galaxies at z=1-3 in cosmological simulations

K. Nagamine (UCSD), R. Cen (Princeton University), L. Hernquist (Harvard University), J. P. Ostriker (Princeton University), V. Springel (MPA)

We study the optical and near infrared properties of galaxies at z=1-3 in a \Lambda cold dark matter universe using two types of cosmological hydrodynamic simulations. We present a unified global picture of massive galaxies at these redshifts when compared with UV-selected and near-IR selected galaxy surveys; namely, roughly a half of the massive galaxies with M\star>1010h-1M\odot at z=2 can be observed with the UV color selection criteria, and the other half observed in near-IR wavelengths, with some overlap between the two populations. Furthermore, the near-IR selected sample can be divided into two categories: dusty starbursts and very red, dead & old galaxies. Our simulations are able to account for the number density of these objects depending on the amount of dust extinction. Contrary to existing claims, we find that models of hierarchical galaxy formation model can account for the massive galaxies observed at z\geq 1.

If you would like more information about this abstract, please follow the link to knagamine@ucsd.edu. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

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