TY - JOUR
T1 - Stellar masses from the candels survey
T2 - The goods-south and uds fields
AU - Santini, P.
AU - Ferguson, H. C.
AU - Fontana, A.
AU - Mobasher, B.
AU - Barro, G.
AU - Castellano, M.
AU - Finkelstein, S. L.
AU - Grazian, A.
AU - Hsu, L. T.
AU - Lee, B.
AU - Lee, S. K.
AU - Pforr, J.
AU - Salvato, M.
AU - Wiklind, T.
AU - Wuyts, S.
AU - Almaini, O.
AU - Cooper, M. C.
AU - Galametz, A.
AU - Weiner, B.
AU - Amorin, R.
AU - Boutsia, K.
AU - Conselice, C. J.
AU - Dahlen, T.
AU - Dickinson, M. E.
AU - Giavalisco, M.
AU - Grogin, N. A.
AU - Guo, Y.
AU - Hathi, N. P.
AU - Kocevski, D.
AU - Koekemoer, A. M.
AU - Kurczynski, P.
AU - Merlin, E.
AU - Mortlock, A.
AU - Newman, J. A.
AU - Paris, D.
AU - Pentericci, L.
AU - Simons, R.
AU - Willner, S. P.
PY - 2015/3/10
Y1 - 2015/3/10
N2 - We present the public release of the stellar mass catalogs for the GOODS-S and UDS fields obtained using some of the deepest near-IR images available, achieved as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey project. We combine the effort from 10 different teams, who computed the stellar masses using the same photometry and the same redshifts. Each team adopted their preferred fitting code, assumptions, priors, and parameter grid. The combination of results using the same underlying stellar isochrones reduces the systematics associated with the fitting code and other choices. Thanks to the availability of different estimates, we can test the effect of some specific parameters and assumptions on the stellar mass estimate. The choice of the stellar isochrone library turns out to have the largest effect on the galaxy stellar mass estimates, resulting in the largest distributions around the median value (with a semi interquartile range larger than 0.1 dex). On the other hand, for most galaxies, the stellar mass estimates are relatively insensitive to the different parameterizations of the star formation history. The inclusion of nebular emission in the model spectra does not have a significant impact for the majority of galaxies (less than a factor of 2 for 80% of the sample). Nevertheless, the stellar mass for the subsample of young galaxies (age <100 Myr), especially in particular redshift ranges (e.g., 2.2 < z < 2.4, 3.2 < z < 3.6, and 5.5 < z < 6.5), can be seriously overestimated (by up to a factor of 10 for <20 Myr sources) if nebular contribution is ignored.
AB - We present the public release of the stellar mass catalogs for the GOODS-S and UDS fields obtained using some of the deepest near-IR images available, achieved as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey project. We combine the effort from 10 different teams, who computed the stellar masses using the same photometry and the same redshifts. Each team adopted their preferred fitting code, assumptions, priors, and parameter grid. The combination of results using the same underlying stellar isochrones reduces the systematics associated with the fitting code and other choices. Thanks to the availability of different estimates, we can test the effect of some specific parameters and assumptions on the stellar mass estimate. The choice of the stellar isochrone library turns out to have the largest effect on the galaxy stellar mass estimates, resulting in the largest distributions around the median value (with a semi interquartile range larger than 0.1 dex). On the other hand, for most galaxies, the stellar mass estimates are relatively insensitive to the different parameterizations of the star formation history. The inclusion of nebular emission in the model spectra does not have a significant impact for the majority of galaxies (less than a factor of 2 for 80% of the sample). Nevertheless, the stellar mass for the subsample of young galaxies (age <100 Myr), especially in particular redshift ranges (e.g., 2.2 < z < 2.4, 3.2 < z < 3.6, and 5.5 < z < 6.5), can be seriously overestimated (by up to a factor of 10 for <20 Myr sources) if nebular contribution is ignored.
KW - catalogs
KW - galaxies: fundamental parameters
KW - galaxies: high-redshift
KW - galaxies: stellar content surveys
UR - http://www.scopus.com/inward/record.url?scp=84924690129&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/801/2/97
DO - 10.1088/0004-637X/801/2/97
M3 - Article
AN - SCOPUS:84924690129
SN - 0004-637X
VL - 801
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 97
ER -