%0 Generic %1 allen2016evolution %A Allen, Rebecca J. %A Kacprzak, Glenn G. %A Glazebrook, Karl %A Labbe, Ivo %A Tran, Kim-Vy H. %A Spitler, Lee R. %A Cowley, Michael %A Nanayakkara, Themiya %A Papovich, Casey %A Quadri, Ryan %A Straatman, Caroline M. S. %A Tilvi, Vithal %A van Dokkum, Pieter %D 2016 %K evolution forming galaxy size star %T The Size Evolution of Star-forming Galaxies Since z~7 Using ZFOURGE %U http://arxiv.org/abs/1612.05262 %X For the first time, we present the size evolution of a mass-complete (log(M*/Msol)>10) sample of star-forming galaxies over redshifts z=1-7, selected from the FourStar Galaxy Evolution Survey (ZFOURGE). Observed H-band sizes are measured from the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS) Hubble Space Telescope (HST)/F160W imaging. Distributions of individual galaxy masses and sizes illustrate that a clear mass-size relation exists up to z~7. At z~7, we find that the average galaxy size from the mass-size relation is more compact at a fixed mass of log(M*/Msol)=10.1, with r_1/2,maj=1.02+/-0.29 kpc, than at lower redshifts. This is consistent with our results from stacking the same CANDELS HST/F160W imaging, when we correct for galaxy position angle alignment. We find that the size evolution of star-forming galaxies is well fit by a power law of the form r_e = 7.07(1 + z)^-0.89 kpc, which is consistent with previous works for normal star-formers at 1<z<4. In order to compare our slope with those derived Lyman break galaxy studies, we correct for different IMFs and methodology and find a slope of -0.97+/-0.02, which is shallower than that reported for the evolution of Lyman break galaxies at z>4 (r_e\propto(1 +z)^-1.2+/-0.06). Therefore, we conclude the Lyman break galaxies likely represent a subset of highly star-forming galaxies that exhibit rapid size growth at z>4.

@misc{allen2016evolution, abstract = {For the first time, we present the size evolution of a mass-complete (log(M*/Msol)>10) sample of star-forming galaxies over redshifts z=1-7, selected from the FourStar Galaxy Evolution Survey (ZFOURGE). Observed H-band sizes are measured from the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS) Hubble Space Telescope (HST)/F160W imaging. Distributions of individual galaxy masses and sizes illustrate that a clear mass-size relation exists up to z~7. At z~7, we find that the average galaxy size from the mass-size relation is more compact at a fixed mass of log(M*/Msol)=10.1, with r_1/2,maj=1.02+/-0.29 kpc, than at lower redshifts. This is consistent with our results from stacking the same CANDELS HST/F160W imaging, when we correct for galaxy position angle alignment. We find that the size evolution of star-forming galaxies is well fit by a power law of the form r_e = 7.07(1 + z)^-0.89 kpc, which is consistent with previous works for normal star-formers at 1<z<4. In order to compare our slope with those derived Lyman break galaxy studies, we correct for different IMFs and methodology and find a slope of -0.97+/-0.02, which is shallower than that reported for the evolution of Lyman break galaxies at z>4 (r_e\propto(1 +z)^-1.2+/-0.06). Therefore, we conclude the Lyman break galaxies likely represent a subset of highly star-forming galaxies that exhibit rapid size growth at z>4.}, added-at = {2016-12-19T09:49:14.000+0100}, author = {Allen, Rebecca J. and Kacprzak, Glenn G. and Glazebrook, Karl and Labbe, Ivo and Tran, Kim-Vy H. and Spitler, Lee R. and Cowley, Michael and Nanayakkara, Themiya and Papovich, Casey and Quadri, Ryan and Straatman, Caroline M. S. and Tilvi, Vithal and van Dokkum, Pieter}, biburl = {https://www.bibsonomy.org/bibtex/2394e8028d9aab7aff41b5475b0212b9c/miki}, description = {[1612.05262] The Size Evolution of Star-forming Galaxies Since z~7 Using ZFOURGE}, interhash = {93e2af0bf2ffa7235340df05844fc069}, intrahash = {394e8028d9aab7aff41b5475b0212b9c}, keywords = {evolution forming galaxy size star}, note = {cite arxiv:1612.05262Comment: 7 pages, 4 figures, accepted to Apj letters}, timestamp = {2016-12-19T09:49:14.000+0100}, title = {The Size Evolution of Star-forming Galaxies Since z~7 Using ZFOURGE}, url = {http://arxiv.org/abs/1612.05262}, year = 2016 }