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The star formation rate density and dust attenuation evolution over 12 Gyr with the VVDS surveys

Authors :
Cucciati, O.
Tresse, L.
Ilbert, O.
Le Fèvre, O.
G. Alecian, K. Belkacem, R. Samadi and D. Valls-Gabaud
O. Cucciati
L. Tresse
O. Ilbert
O. . Fevre
Laboratoire d'Astrophysique de Marseille (LAM)
Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Tresse, Laurence
Source :
SF2A-2011: Annual meeting of the French Society of Astronomy and Astrophysics, SF2A-2011: Annual meeting of the French Society of Astronomy and Astrophysics, Jun 2011, Paris, France
Publication Year :
2011

Abstract

International audience; We investigate the cosmic star formation rate density (SFRD) over ∼12 Gyr (0.05≤ z≤ 4.5), combining the VVDS Deep (17.5 ≤ I_{AB}≤ 24.0) and Ultra-Deep (23.00 ≤ i'_{AB} ≤ 24.75) surveys. We obtain a single homogeneous spectroscopic redshift sample, totalizing about 11000 galaxies. We estimate the rest-frame FUV luminosity function (LF) and luminosity density (LD), extract the dust attenuation of the FUV radiation using SED fitting, and derive the dust-corrected SFRD. We find a constant and flat faint-end slope alpha in the FUV LF at z2 it is on average brighter than in the literature, while φ^{*} is smaller. Our total LD shows a robust peak at z≃2, and the SFRD history peaks as well at z≃2. This peak is produced by the decreasing contribution at z2 the SFRD is entirely shaped by the high specific SFR galaxies. The presence of a fast rise at z>2 and of a clear peak at z≃2 of the SFRD is compelling for models of galaxy formation. The mean dust attenuation A_{FUV} of the global galaxy population rises by 1 mag from z=4.5 to z=2, reaches its maximum at z=1 (A_{FUV}≃2.2 mag), and then decreases by 1.1 mag down to z=0. The dust attenuation maximum is reached 2 Gyr after the SFRD peak, implying a contribution from the intermediate-mass stars to the dust production at z

Details

Language :
English
Database :
OpenAIRE
Journal :
SF2A-2011: Annual meeting of the French Society of Astronomy and Astrophysics, SF2A-2011: Annual meeting of the French Society of Astronomy and Astrophysics, Jun 2011, Paris, France
Accession number :
edsair.dedup.wf.001..5a866648c72c09f8be49ae470565f191