Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0709.0621)
· On-line Data
· References in the article
· Citations to the Article (58) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (797)
· NED Objects (795)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Strong size evolution of the most massive galaxies since z ~ 2
Authors:
Trujillo, Ignacio; Conselice, C. J.; Bundy, Kevin; Cooper, M. C.; Eisenhardt, P.; Ellis, Richard S.
Affiliation:
AA(School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD), AB(School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD), AC(Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Rm 101, Toronto ONM5S 3H4, Canada), AD(Department of Astronomy, University of California at Berkeley, Berkeley, CA 94720, USA), AE(Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA), AF(Caltech MC 105-24, 1201 East California Boulevard, Pasadena, CA 91125, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 382, Issue 1, pp. 109-120. (MNRAS Homepage)
Publication Date:
11/2007
Origin:
MNRAS
MNRAS Keywords:
galaxies: elliptical and lenticular, cD, galaxies: evolution, galaxies: formation, galaxies: fundamental parameters, galaxies: high-redshift, galaxies: structure
DOI:
10.1111/j.1365-2966.2007.12388.x
Bibliographic Code:
2007MNRAS.382..109T

Abstract

Using the combined capabilities of the large near-infrared Palomar/DEEP-2 survey, and the superb resolution of the Advanced Camera for Surveys HST camera, we explore the size evolution of 831 very massive galaxies (M* >= 1011h-270Msolar) since z ~ 2. We split our sample according to their light concentration using the Sérsic index n. At a given stellar mass, both low (n < 2.5) and high (n > 2.5) concentrated objects were much smaller in the past than their local massive counterparts. This evolution is particularly strong for the highly concentrated (spheroid like) objects. At z ~ 1.5, massive spheroid-like objects were a factor of 4 (+/-0.4) smaller (i.e. almost two orders of magnitudes denser) than those we see today. These small sized, high-mass galaxies do not exist in the nearby Universe, suggesting that this population merged with other galaxies over several billion years to form the largest galaxies we see today.

Associated Articles

Source Paper     Catalog Description     Catalog Description    

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints