%0 Generic %1 mosleh2012evolution %A Mosleh, Moein %A Williams, Rik J. %A Franx, Marijn %A Gonzalez, Valentino %A Bouwens, Rychard J. %A Oesch, Pascal %A Labbe, Ivo %A Illingworth, Garth D. %A Trenti, Michele %D 2012 %K formation galaxy high-z size star %T The Evolution of Mass-size Relation for Lyman Break Galaxies From z=1 to z=7 %U http://arxiv.org/abs/1207.6634 %X For the first time, we study the evolution of the stellar mass-size relation for star-forming galaxies from z ~ 4 to z ~ 7 from Hubble-WFC3/IR camera observations of the HUDF and Early Release Science (ERS) field. The sizes are measured by determining the best fit model to galaxy images in the rest-frame 2100 \AA \ with the stellar masses estimated from SED fitting to rest-frame optical (from Spitzer/IRAC) and UV fluxes. We show that the stellar mass-size relation of Lyman-break galaxies (LBGs) persists, at least to z ~ 5, and the median size of LBGs at a given stellar mass increases towards lower redshifts. For galaxies with stellar masses of 9.5<Log(M*/Msun)<10.4 sizes evolve as $(1+z)^-1.20\pm0.11$. This evolution is very similar for galaxies with lower stellar masses of 8.6<Log(M*/Msun)<9.5 which is $r_e \propto (1+z)^-1.18\pm0.10$, in agreement with simple theoretical galaxy formation models at high z. Our results are consistent with previous measurements of the LBGs mass-size relation at lower redshifts (z ~ 1-3).

@misc{mosleh2012evolution, abstract = {For the first time, we study the evolution of the stellar mass-size relation for star-forming galaxies from z ~ 4 to z ~ 7 from Hubble-WFC3/IR camera observations of the HUDF and Early Release Science (ERS) field. The sizes are measured by determining the best fit model to galaxy images in the rest-frame 2100 \AA \ with the stellar masses estimated from SED fitting to rest-frame optical (from Spitzer/IRAC) and UV fluxes. We show that the stellar mass-size relation of Lyman-break galaxies (LBGs) persists, at least to z ~ 5, and the median size of LBGs at a given stellar mass increases towards lower redshifts. For galaxies with stellar masses of 9.5<Log(M*/Msun)<10.4 sizes evolve as $(1+z)^{-1.20\pm0.11}$. This evolution is very similar for galaxies with lower stellar masses of 8.6<Log(M*/Msun)<9.5 which is $r_{e} \propto (1+z)^{-1.18\pm0.10}$, in agreement with simple theoretical galaxy formation models at high z. Our results are consistent with previous measurements of the LBGs mass-size relation at lower redshifts (z ~ 1-3).}, added-at = {2012-07-31T10:28:19.000+0200}, author = {Mosleh, Moein and Williams, Rik J. and Franx, Marijn and Gonzalez, Valentino and Bouwens, Rychard J. and Oesch, Pascal and Labbe, Ivo and Illingworth, Garth D. and Trenti, Michele}, biburl = {https://www.bibsonomy.org/bibtex/2020562fb0bc42a009a1a05e3c95a5244/miki}, description = {[1207.6634] The Evolution of Mass-size Relation for Lyman Break Galaxies From z=1 to z=7}, interhash = {3d766af629be25da40d3f124b858736f}, intrahash = {020562fb0bc42a009a1a05e3c95a5244}, keywords = {formation galaxy high-z size star}, note = {cite arxiv:1207.6634Comment: Accepted for publication in The Astrophysical Journal Letters}, timestamp = {2012-07-31T10:28:19.000+0200}, title = {The Evolution of Mass-size Relation for Lyman Break Galaxies From z=1 to z=7}, url = {http://arxiv.org/abs/1207.6634}, year = 2012 }