%0 Generic %1 novak2017vlacosmos %A Novak, M. %A Smolcic, V. %A Delhaize, J. %A Delvecchio, I. %A Zamorani, G. %A Baran, N. %A Bondi, M. %A Capak, P. %A Carilli, C. L. %A Ciliegi, P. %A Civano, F. %A Ilbert, O. %A Karim, A. %A Laigle, C. %A Fevre, O. Le %A Marchesi, S. %A McCracken, H. %A Miettinen, O. %A Salvato, M. %A Sargent, M. %A Schinnerer, E. %A Tasca, L. %D 2017 %K formation history obscured radio rate star %T The VLA-COSMOS 3 GHz Large Project: The cosmic star formation history since z~5 %U http://arxiv.org/abs/1703.09724 %X We make use of the deep Karl G. Jansky Very Large Array (VLA) COSMOS radio observations at 3 GHz to infer radio luminosity functions of star-forming galaxies up to redshifts of z~5 based on approximately 6000 detections with reliable optical counterparts. This is currently the largest radio-selected sample available out to z~5 across an area of 2 square degrees with a sensitivity of rms=2.3 ujy/beam. By fixing the faint and bright end shape of the radio luminosity function to the local values, we find a strong redshift trend that can be fitted with a pure luminosity evolution L~(1+z)^(3.16 +- 0.2)-(0.32 +- 0.07) z. We estimate star formation rates (SFRs) from our radio luminosities using an infrared (IR)-radio correlation that is redshift dependent. By integrating the parametric fits of the evolved luminosity function we calculate the cosmic SFR density (SFRD) history since z~5. Our data suggest that the SFRD history peaks between 2<z<3 and that the ultraluminous infrared galaxies (ULIRGs; 100 Msol/yr<SFR<1000 Msol/yr) contribute up to ~25% to the total SFRD in the same redshift range. Hyperluminous infrared galaxies (HyLIRGs; SFR>1000 Msol/yr) contribute an additional <2% in the entire observed redshift range. We find evidence of a potential underestimation of SFRD based on ultraviolet (UV) rest-frame observations of Lyman break galaxies (LBGs) at high redshifts (z>4) on the order of 15-20%, owing to appreciable star formation in highly dust-obscured galaxies, which might remain undetected in such UV observations.

@misc{novak2017vlacosmos, abstract = {We make use of the deep Karl G. Jansky Very Large Array (VLA) COSMOS radio observations at 3 GHz to infer radio luminosity functions of star-forming galaxies up to redshifts of z~5 based on approximately 6000 detections with reliable optical counterparts. This is currently the largest radio-selected sample available out to z~5 across an area of 2 square degrees with a sensitivity of rms=2.3 ujy/beam. By fixing the faint and bright end shape of the radio luminosity function to the local values, we find a strong redshift trend that can be fitted with a pure luminosity evolution L~(1+z)^{(3.16 +- 0.2)-(0.32 +- 0.07) z}. We estimate star formation rates (SFRs) from our radio luminosities using an infrared (IR)-radio correlation that is redshift dependent. By integrating the parametric fits of the evolved luminosity function we calculate the cosmic SFR density (SFRD) history since z~5. Our data suggest that the SFRD history peaks between 2<z<3 and that the ultraluminous infrared galaxies (ULIRGs; 100 Msol/yr<SFR<1000 Msol/yr) contribute up to ~25% to the total SFRD in the same redshift range. Hyperluminous infrared galaxies (HyLIRGs; SFR>1000 Msol/yr) contribute an additional <2% in the entire observed redshift range. We find evidence of a potential underestimation of SFRD based on ultraviolet (UV) rest-frame observations of Lyman break galaxies (LBGs) at high redshifts (z>4) on the order of 15-20%, owing to appreciable star formation in highly dust-obscured galaxies, which might remain undetected in such UV observations.}, added-at = {2017-03-30T14:53:18.000+0200}, author = {Novak, M. and Smolcic, V. and Delhaize, J. and Delvecchio, I. and Zamorani, G. and Baran, N. and Bondi, M. and Capak, P. and Carilli, C. L. and Ciliegi, P. and Civano, F. and Ilbert, O. and Karim, A. and Laigle, C. and Fevre, O. Le and Marchesi, S. and McCracken, H. and Miettinen, O. and Salvato, M. and Sargent, M. and Schinnerer, E. and Tasca, L.}, biburl = {https://www.bibsonomy.org/bibtex/263acfdc0f7e30c613f790b83aba337af/miki}, description = {[1703.09724] The VLA-COSMOS 3 GHz Large Project: The cosmic star formation history since z~5}, interhash = {cc3da4762f1106dbd475a2ae5b6143e7}, intrahash = {63acfdc0f7e30c613f790b83aba337af}, keywords = {formation history obscured radio rate star}, note = {cite arxiv:1703.09724Comment: 18 pages, 8 figures}, timestamp = {2017-03-30T14:53:18.000+0200}, title = {The VLA-COSMOS 3 GHz Large Project: The cosmic star formation history since z~5}, url = {http://arxiv.org/abs/1703.09724}, year = 2017 }