Issue |
A&A
Volume 453, Number 3, July III 2006
|
|
---|---|---|
Page(s) | 869 - 881 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20054376 | |
Published online | 28 June 2006 |
The stellar masses of 25 000 galaxies at 0.2 ≤ z ≤ 1.0 estimated by the COMBO-17 survey
1
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany e-mail: meisenheimer@mpia.de
2
Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
3
Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
4
School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3YB, UK
5
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
Received:
19
October
2005
Accepted:
25
March
2006
We present an analysis of stellar
mass estimates for a sample of 25000 galaxies from the COMBO-17
survey over the interval . We have developed,
implemented, and tested
a new method of estimating stellar mass-to-light ratios,
which relies on redshift and spectral
energy distribution (SED)
classification from 5 broadband and 12 medium band filters.
We find that the majority (>
) of massive galaxies
with
at all
are non-star-forming; blue star-forming galaxies dominate
at lower masses. We have used these mass estimates to explore the
evolution of the stellar mass function since
.
We find that the total stellar mass density
of the universe has roughly doubled since
.
Our measurements are consistent with other measurements
of the growth of stellar mass with cosmic time and
with estimates of the time evolution of the cosmic star formation rate.
Intriguingly, the integrated stellar mass of blue
galaxies with young stars has not significantly changed since
, even though these galaxies host the majority
of the star formation: instead, the growth of the
total stellar mass density is dominated by the growth of
the total mass in the largely passive galaxies on the red sequence.
Key words: galaxies: luminosity function, mass function / galaxies: evolution
© ESO, 2006
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