%0 Generic %1 vandokkum2013assembly %A van Dokkum, Pieter G. %A Leja, Joel %A Nelson, Erica June %A Patel, Shannon %A Skelton, Rosalind E. %A Momcheva, Ivelina %A Brammer, Gabrial %A Whitaker, Katherine E. %A Lundgren, Britt %A Fumagalli, Mattia %A Conroy, Charlie %A Schreiber, Natascha Förster %A Franx, Marijn %A Kriek, Mariska %A Labbé, Ivo %A Marchesini, Danilo %A Rix, Hans-Walter %A van der Wel, Arjen %A Wuyts, Stijn %D 2013 %K evolution formation galaxy observation %T The Assembly of Milky Way-like Galaxies Since z~2.5 %U http://arxiv.org/abs/1304.2391 %X Galaxies with the mass of the Milky Way dominate the stellar mass density of the Universe but it is uncertain how and when they were assembled. Here we study progenitors of these galaxies out to z~2.5, using data from the 3D-HST and CANDELS Treasury surveys. We find that galaxies with present-day stellar masses of log(M)~10.7 M_sun built ~90% of their stellar mass since z~2.5, with most of the star formation occurring before z~1. In marked contrast to the assembly history of massive elliptical galaxies, the centers and outer parts of the galaxies built up at roughly the same rate between z~2.5 and z~1. We therefore conclude that a "standard" model for the formation of spiral galaxies, with the bulge assembling first and the disk building around it, is probably not correct. Instead, bulges (and black holes) likely formed in lockstep with disks, through bar instabilities, clump migration or other processes. We find that after z~1 the growth in the central regions gradually stopped and the disk continued to build, consistent with recent studies of the gas distributions in z~1 galaxies and the properties of many spiral galaxies today.

@misc{vandokkum2013assembly, abstract = {Galaxies with the mass of the Milky Way dominate the stellar mass density of the Universe but it is uncertain how and when they were assembled. Here we study progenitors of these galaxies out to z~2.5, using data from the 3D-HST and CANDELS Treasury surveys. We find that galaxies with present-day stellar masses of log(M)~10.7 M_sun built ~90% of their stellar mass since z~2.5, with most of the star formation occurring before z~1. In marked contrast to the assembly history of massive elliptical galaxies, the centers and outer parts of the galaxies built up at roughly the same rate between z~2.5 and z~1. We therefore conclude that a "standard" model for the formation of spiral galaxies, with the bulge assembling first and the disk building around it, is probably not correct. Instead, bulges (and black holes) likely formed in lockstep with disks, through bar instabilities, clump migration or other processes. We find that after z~1 the growth in the central regions gradually stopped and the disk continued to build, consistent with recent studies of the gas distributions in z~1 galaxies and the properties of many spiral galaxies today.}, added-at = {2013-04-10T19:03:23.000+0200}, author = {van Dokkum, Pieter G. and Leja, Joel and Nelson, Erica June and Patel, Shannon and Skelton, Rosalind E. and Momcheva, Ivelina and Brammer, Gabrial and Whitaker, Katherine E. and Lundgren, Britt and Fumagalli, Mattia and Conroy, Charlie and Schreiber, Natascha Förster and Franx, Marijn and Kriek, Mariska and Labbé, Ivo and Marchesini, Danilo and Rix, Hans-Walter and van der Wel, Arjen and Wuyts, Stijn}, biburl = {https://www.bibsonomy.org/bibtex/2cb8535e79c9bdf146580a53352a395b7/miki}, description = {[1304.2391] The Assembly of Milky Way-like Galaxies Since z~2.5}, interhash = {5704628ae412c01966e12c8fa36f667e}, intrahash = {cb8535e79c9bdf146580a53352a395b7}, keywords = {evolution formation galaxy observation}, note = {cite arxiv:1304.2391Comment: Submitted to ApJ Letters. 7 pages, 5 figures}, timestamp = {2013-04-10T19:03:23.000+0200}, title = {The Assembly of Milky Way-like Galaxies Since z~2.5}, url = {http://arxiv.org/abs/1304.2391}, year = 2013 }