High-redshift elliptical galaxies : are they ( all ) really compact ?

Abstract

We investigate the properties of 12 ultramassive passively evolving early-type galaxies (ETGs) at zphot > 1.4 in the COSMOS 2 deg2 field. These 12 ETGs were selected as pBzKs, have accurate 1.4 zphot 1.7, high Sérsic index profiles typical of ellipticals, no detection at 24μm, resulting in a complete ETG sample at M∗ > 2.5 × 1011 M (Chabrier initial mass… (More)

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