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).
Description
[1207.6634] The Evolution of Mass-size Relation for Lyman Break Galaxies From z=1 to z=7
%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
}