Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-23T18:02:48.707Z Has data issue: false hasContentIssue false
  • English
  • Français

Massive and Evolved Galaxies at z ≥ 5

Published online by Cambridge University Press:  01 August 2006

T. Wiklind ,
B. Mobasher ,
M. Dickinson ,
H. Ferguson ,
M. Giavalisco ,
N. Grogin  and
N. Panagia
T. Wiklind
Affiliation:
ESA/STScI, Baltimore, MD 21218, USA email: [email protected]
B. Mobasher
Affiliation:
ESA/STScI, Baltimore, MD 21218, USA email: [email protected]
M. Dickinson
Affiliation:
NOAO, Tucson, AZ 85726, USA
H. Ferguson
Affiliation:
STScI, Baltimore, MD 21218, USA
M. Giavalisco
Affiliation:
STScI, Baltimore, MD 21218, USA
N. Grogin
Affiliation:
Johns Hopkins University, Baltimore, MD 21218, USA
N. Panagia
Affiliation:
STScI, Baltimore, MD 21218, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We search for massive and evolved galaxies at z ≥ 5 in the Great Observatories Origins Deep Survey (GOODS) southern field. Combining HST ACS, VLT ISAAC and Spitzer IRAC broad–band photometric data, we develop a color selection technique to identify candidates for being evolved galaxies at high redshifts. The color selection is primarily based on locating the Balmer–break using the K- and 3.6 μm bands. Stellar population synthesis models are fitted to the SEDs of these galaxies to identify the final sample. We find 11 candidates with photometric redshifts in the range 4.9 < z < 5.6, dominated by an old stellar population, with ages 0.2-1.0 Gyr, and stellar masses in the range (0.7 − 5) × 1011 M⊙. Most of the candidates have modest amounts of internal dust extinction. The majority of the stars in these galaxies were formed at z>9 and the current star formation activity is a few percent of the inferred initial star formation rate.

Keywords

galaxies: evolutiongalaxies: formationgalaxies: high redshift
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 368 - 372
Copyright
Copyright © International Astronomical Union 2007

References

Bouwens, R. J., & Illingworth, G. D 2006, Nature 443, 189CrossRefGoogle Scholar
Bruzual, G., & Charlot, S. 2003, MNRAS 344, 1000CrossRefGoogle Scholar
Calzetti, D., Armus, L., Bohlin, R. C., Kinney, A. L., Koornneed, J., & Storchi-Bergmann, T. 2000 ApJ 533, 682CrossRefGoogle Scholar
Daddi, E. 2004, ApJ 617, 746CrossRefGoogle Scholar
Dickinson, M., Giavalisco, M., & the GOODS Team 2003, in: Bender, R. & Renzini, A. (eds) The Mass of Galaxies at Low and High Redshift Springer VerlagGoogle Scholar
Franx, M. 2003, ApJ 587, L79CrossRefGoogle Scholar
Giavalisco, M. 2004, ApJL 600, 93CrossRefGoogle Scholar
Leitherer, C. 1999, ApJS 123, 3CrossRefGoogle Scholar
Maraston, C. 2005, MNRAS 362, 799CrossRefGoogle Scholar
Steidel, C. C, Giavalisco, M., Pettini, M., Dickinson, M., & Adelberger, K. L. 1996, ApJ 462, L17CrossRefGoogle Scholar
Vanzella, E., Cristiani, S., Dickinson, M., Kuntschner, H., Nonino, M., Rettma, A. 2006, A&A 454, 423Google Scholar
Yan, H. 2004, ApJS 154, 75CrossRefGoogle Scholar