%0 Generic %1 calhau2016growth %A Calhau, João %A Sobral, David %A Stroe, Andra %A Best, Philip %A Smail, Ian %A Lehmer, Bret %A Harrison, Chris %A Thomson, Alasdair %D 2016 %K black growth hole mass sfr stellar %T The growth of typical star-forming galaxies and their super massive black holes across cosmic time since z~2 %U http://arxiv.org/abs/1609.03571 %X Understanding galaxy formation and evolution requires studying the interplay between the growth of galaxies and the growth of their black holes across cosmic time. Here we explore a sample of Ha-selected star-forming galaxies from the HiZELS survey and use the wealth of multi-wavelength data in the COSMOS field (X-rays, far-infrared and radio) to study the relative growth rates between typical galaxies and their central supermassive black holes, from z=2.23 to z=0. Typical star-forming galaxies at z~1-2 have black hole accretion rates (BHARs) of 0.001-0.01 Msun/yr and star formation rates (SFRs) of ~10-40 Msun/yr, and thus grow their stellar mass much quicker than their black hole mass (~3.3 orders of magnitude faster). However, ~3% of the sample (the sources detected directly in the X-rays) show a significantly quicker growth of the black hole mass (up to 1.5 orders of magnitude quicker growth than the typical sources). BHARs fall from z=2.23 to z=0, with the decline resembling that of star formation rate density or the typical SFR. We find that the average black hole to galaxy growth (BHAR/SFR) is approximately constant for star-forming galaxies in the last 11 Gyrs. The relatively constant BHAR/SFR suggests that these two quantities evolve equivalently through cosmic time and with practically no delay between the two.

@misc{calhau2016growth, abstract = {Understanding galaxy formation and evolution requires studying the interplay between the growth of galaxies and the growth of their black holes across cosmic time. Here we explore a sample of Ha-selected star-forming galaxies from the HiZELS survey and use the wealth of multi-wavelength data in the COSMOS field (X-rays, far-infrared and radio) to study the relative growth rates between typical galaxies and their central supermassive black holes, from z=2.23 to z=0. Typical star-forming galaxies at z~1-2 have black hole accretion rates (BHARs) of 0.001-0.01 Msun/yr and star formation rates (SFRs) of ~10-40 Msun/yr, and thus grow their stellar mass much quicker than their black hole mass (~3.3 orders of magnitude faster). However, ~3% of the sample (the sources detected directly in the X-rays) show a significantly quicker growth of the black hole mass (up to 1.5 orders of magnitude quicker growth than the typical sources). BHARs fall from z=2.23 to z=0, with the decline resembling that of star formation rate density or the typical SFR. We find that the average black hole to galaxy growth (BHAR/SFR) is approximately constant for star-forming galaxies in the last 11 Gyrs. The relatively constant BHAR/SFR suggests that these two quantities evolve equivalently through cosmic time and with practically no delay between the two.}, added-at = {2016-09-14T09:33:16.000+0200}, author = {Calhau, João and Sobral, David and Stroe, Andra and Best, Philip and Smail, Ian and Lehmer, Bret and Harrison, Chris and Thomson, Alasdair}, biburl = {https://www.bibsonomy.org/bibtex/204f2269cbcbde1f546f60bb9da30757e/miki}, description = {[1609.03571] The growth of typical star-forming galaxies and their super massive black holes across cosmic time since z~2}, interhash = {ff0e6ad28ee1bb187722e7997f4c275d}, intrahash = {04f2269cbcbde1f546f60bb9da30757e}, keywords = {black growth hole mass sfr stellar}, note = {cite arxiv:1609.03571Comment: 10 pages, 8 figures, accepted to MNRAS}, timestamp = {2016-09-14T09:33:16.000+0200}, title = {The growth of typical star-forming galaxies and their super massive black holes across cosmic time since z~2}, url = {http://arxiv.org/abs/1609.03571}, year = 2016 }