Red Nuggets at z~1.5: Compact passive galaxies and the formation of the Kormendy Relation

Details Red Nuggets at z~1.5: Compact passive galaxies and the formation of the Kormendy Relation Red Nuggets at z~1.5: Compact passive galaxies and the formation of the Kormendy Relation

2008-07-10

arxiv.org/abs/0807.1744v3

Astrophys.J.695:101-115,2009

Astronomy and Astrophysics

Astrophysics

Accepted version (to appear in ApJ)

Scientific paper

10.1088/0004-637X/695/1/101

We present the results of NICMOS imaging of a sample of 16 high mass passively evolving galaxies with 1.31 Gyr. Our rest-frame R-band images show that most of these objects have compact regular morphologies which follow the classical R^1/4 law. These galaxies scatter along a tight sequence in the Kormendy relation. Around one-third of the massive red objects are extraordinarily compact, with effective radii under one kiloparsec. Our NICMOS observations allow the detection of such systems more robustly than is possible with optical (rest-frame UV) data, and while similar systems have been seen at z>2, this is the first time such systems have been detected in a rest-frame optical survey at 1.3

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