| | |
| | |
Stat |
Members: 3645 Articles: 2'506'133 Articles rated: 2609
26 April 2024 |
|
| | | |
|
Article overview
| |
|
The contribution of very massive high-redshift SWIRE galaxies to the stellar mass function | S. Berta
; C.J. Lonsdale
; M. Polletta
; R.S. Savage
; A. Franceschini
; H. Buttery
; A. Cimatti
; J. Dias
; C. Feruglio
; F. Fiore
; E.V. Held
; F. La Franca
; R. Maiolino
; A. Marconi
; I. Matute
; S.J. Oliver
; E. Ricciardelli
; S. Rubele
; N. Sacchi
; D. Shupe
; J. Surace
; | Date: |
1 Oct 2007 | Abstract: | (Abridged) We selected high-z massive galaxies at 5.8 microns, in the SWIRE
ELAIS-S1 field (1 sq. deg.). Galaxies with the 1.6 microns stellar peak
redshifted into the IRAC bands (z~1-3, called ’’IR-peakers’’) were identified.
Stellar masses were derived by means of spectro-photometric fitting and used to
compute the stellar mass function (MF) at z=1-2 and 2-3. A parametric fit to
the MF was performed, based on a Bayesian formalism, and the stellar mass
density of massive galaxies above z=2 determined. We present the first
systematic study of the very-massive tail of the galaxy stellar mass function
at high redshift. A total of 326 sources were selected. The majority of these
galaxies have stellar masses in excess of 1e11 Msun and lie at z>1.5. The
availability of mid-IR data turned out to be a valuable tool to constrain the
contribution of young stars to galaxy SEDs, and thus their M(stars)/L ratio.
The influence of near-IR data and of the chosen stellar library on the SED
fitting are also discussed. A significant evolution is found not only for
galaxies with M~1e11 Msun, but also in the highest mass bins considered. The
comoving number density of these galaxies was lower by more than a factor of 10
at z=2-3, with respect to the local estimate. SWIRE 5.8 micron peakers more
massive than 1.6x1e11 Msun provide 30-50% of the total stellar mass density in
galaxies at z=2-3. | Source: | arXiv, 0710.0300 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |