The evolution of the stellar mass functions of star-forming and quiescent galaxies to z = 4 from the COSMOS/ultraVISTA survey
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The evolution of the stellar mass functions of star-forming and quiescent galaxies to z = 4 from the COSMOS/ultraVISTA survey. / Muzzin, Adam; Marchesini, Danilo; Stefano, Mauro; Frank, Marijn; McCracken, Henry J; Milvang-Jensen, Bo; Dunlop, James S.; Fynbo, Johan Peter Uldall; Brammer, Gabriel; Labbe, Ivo; van Dokkum, P.G.
I: Astrophysical Journal, Bind 777, Nr. 1, 18, 01.11.2013.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - The evolution of the stellar mass functions of star-forming and quiescent galaxies to z = 4 from the COSMOS/ultraVISTA survey
AU - Muzzin, Adam
AU - Marchesini, Danilo
AU - Stefano, Mauro
AU - Frank, Marijn
AU - McCracken, Henry J
AU - Milvang-Jensen, Bo
AU - Dunlop, James S.
AU - Fynbo, Johan Peter Uldall
AU - Brammer, Gabriel
AU - Labbe, Ivo
AU - van Dokkum, P.G.
PY - 2013/11/1
Y1 - 2013/11/1
N2 - We present measurements of the stellar mass functions (SMFs) of star-forming and quiescent galaxies to z = 4 using a sample of 95,675 Ks -selected galaxies in the COSMOS/UltraVISTA field. The SMFs of the combined population are in good agreement with previous measurements and show that the stellar mass density of the universe was only 50%, 10%, and 1% of its current value at z 0.75, 2.0, and 3.5, respectively. The quiescent population drives most of the overall growth, with the stellar mass density of these galaxies increasing as ρ(1 + z) since z = 3.5, whereas the mass density of star-forming galaxies increases as ρ(1 + z). At z > 2.5, star-forming galaxies dominate the total SMF at all stellar masses, although a non-zero population of quiescent galaxies persists to z = 4. Comparisons of the Ks -selected star-forming galaxy SMFs with UV-selected SMFs at 2.5 3.5. We estimate the average mass growth of individual galaxies by selecting galaxies at fixed cumulative number density. The average galaxy with log(M /M ) = 11.5 at z = 0.3 has grown in mass by only 0.2 dex (0.3 dex) since z = 2.0 (3.5), whereas those with log(M /M ) = 10.5 have grown by >1.0 dex since z = 2. At z <2, the time derivatives of the mass growth are always larger for lower-mass galaxies, which demonstrates that the mass growth in galaxies since that redshift is mass-dependent and primarily bottom-up. Lastly, we examine potential sources of systematic uncertainties in the SMFs and find that those from photo-z templates, stellar population synthesis modeling, and the definition of quiescent galaxies dominate the total error budget in the SMFs.
AB - We present measurements of the stellar mass functions (SMFs) of star-forming and quiescent galaxies to z = 4 using a sample of 95,675 Ks -selected galaxies in the COSMOS/UltraVISTA field. The SMFs of the combined population are in good agreement with previous measurements and show that the stellar mass density of the universe was only 50%, 10%, and 1% of its current value at z 0.75, 2.0, and 3.5, respectively. The quiescent population drives most of the overall growth, with the stellar mass density of these galaxies increasing as ρ(1 + z) since z = 3.5, whereas the mass density of star-forming galaxies increases as ρ(1 + z). At z > 2.5, star-forming galaxies dominate the total SMF at all stellar masses, although a non-zero population of quiescent galaxies persists to z = 4. Comparisons of the Ks -selected star-forming galaxy SMFs with UV-selected SMFs at 2.5 3.5. We estimate the average mass growth of individual galaxies by selecting galaxies at fixed cumulative number density. The average galaxy with log(M /M ) = 11.5 at z = 0.3 has grown in mass by only 0.2 dex (0.3 dex) since z = 2.0 (3.5), whereas those with log(M /M ) = 10.5 have grown by >1.0 dex since z = 2. At z <2, the time derivatives of the mass growth are always larger for lower-mass galaxies, which demonstrates that the mass growth in galaxies since that redshift is mass-dependent and primarily bottom-up. Lastly, we examine potential sources of systematic uncertainties in the SMFs and find that those from photo-z templates, stellar population synthesis modeling, and the definition of quiescent galaxies dominate the total error budget in the SMFs.
UR - http://www.scopus.com/inward/record.url?scp=84886887953&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/777/1/18
DO - 10.1088/0004-637X/777/1/18
M3 - Journal article
AN - SCOPUS:84886887953
VL - 777
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 18
ER -
ID: 77572729