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The Stellar Mass Function of Galaxies to z ~ 5 in the FORS Deep and GOODS-South Fields

2005; IOP Publishing; Volume: 619; Issue: 2 Linguagem: Inglês

10.1086/428044

1538-4357

Niv Drory, M. Salvato, A. Gabasch, R. Bender, U. Hopp, Georg Feulner, M. Pannella,

Gamma-ray bursts and supernovae

We present a measurement of the evolution of the stellar mass function (MF) of galaxies and the evolution of the total stellar mass density at 010^10 Msun which are the likely progenitors of todays L* galaxies are found in much smaller numbers above z=2. However, we note that massive galaxies with M>10^11 Msun are present even to the largest redshift we probe. Beyond z=2 the evolution of the mass function becomes more rapid. We find that the total stellar mass density at z=1 is 50% of the local value. At z=2, 25% of the local mass density is assembled, and at z=3 and z=5 we find that at least 15% and 5% of the mass in stars is in place, respectively. The number density of galaxies with M>10^11 Msun evolves very similarly to the evolution at lower masses. It decreases by 0.4 dex to z=1, by 0.6 dex to z=2, and by 1 dex to z=4.