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

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

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sf2a.conf...85c&link_type=abstract

SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: G. Alecian, K. Belkacem,

Astronomy and Astrophysics

Astrophysics

1

Cosmology: Observations, Galaxies: Evolution, Luminosity Function, High-Redshift, Star Formation

Scientific paper

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 z<1.7. The absolute magnitude M^{*}_{FUV} brightens in the entire range 02 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 z<2 of galaxies with -21.5 ≤ M_{FUV} ≤ -19.5 mag. As times goes by, the total SFRD is dominated by fainter and fainter galaxies. Moreover, at z>2 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<2.

Affiliated with

Also associated with

No associations

Rating

The star formation rate density and dust attenuation evolution over 12 Gyr with the VVDS surveys does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The star formation rate density and dust attenuation evolution over 12 Gyr with the VVDS surveys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The star formation rate density and dust attenuation evolution over 12 Gyr with the VVDS surveys will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1439324