Identification and Morphologies of Galaxies with Old Stellar Populations at z ~ 2.5

2007/02/05 by Alan Stockton, Elizabeth J. McGrath, Stockton, Alan +1
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.astro-ph/0702130

openalex publication_date 2007/02/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We describe a study of morphologies of galaxies with old stellar populations in radio-source fields at z ~ 2.5. A significant fraction of these are dominated by disks of old stars, and none we have found so far has the properties of present-epoch ellipticals. Recent Spitzer IRAC data confirms that at least one of our prime examples is definitely not a reddened star-forming galaxy.

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