TY - JOUR
T1 - Chasing passive galaxies in the early Universe: a critical analysis in CANDELS GOODS-South
AU - Merlin, E.
AU - Fontana, A.
AU - Castellano, M.
AU - Santini, P.
AU - Torelli, M.
AU - Boutsia, K.
AU - Wang, T.
AU - Grazian, A.
AU - Pentericci, L.
AU - Schreiber, C.
AU - Ciesla, L.
AU - McLure, R.
AU - Derriere, S.
AU - Dunlop, J. S.
AU - Elbaz, D.
PY - 2017/9/16
Y1 - 2017/9/16
N2 - We search for passive galaxies at z > 3 in the GOODS-South field,
using different techniques based on photometric data, and paying
attention to develop methods that are sensitive to objects that have
become passive shortly before the epoch of observation. We use CANDELS
HST catalogues, ultra-deep Ks data and new IRAC photometry, performing
spectral energy distribution fitting using models with abruptly quenched
star formation histories. We then single out galaxies which are best
fitted by a passively evolving model, and having only low probability
( 3 is still subject to
significant uncertainties, being sensitive to assumptions in the SED
modelling adopted and to the relatively low S/N of the objects. By means
of dedicated simulations, we show that JWST will greatly enhance the
accuracy, allowing for a much more robust classification.
AB - We search for passive galaxies at z > 3 in the GOODS-South field,
using different techniques based on photometric data, and paying
attention to develop methods that are sensitive to objects that have
become passive shortly before the epoch of observation. We use CANDELS
HST catalogues, ultra-deep Ks data and new IRAC photometry, performing
spectral energy distribution fitting using models with abruptly quenched
star formation histories. We then single out galaxies which are best
fitted by a passively evolving model, and having only low probability
( 3 is still subject to
significant uncertainties, being sensitive to assumptions in the SED
modelling adopted and to the relatively low S/N of the objects. By means
of dedicated simulations, we show that JWST will greatly enhance the
accuracy, allowing for a much more robust classification.
KW - methods: data analysis
KW - catalogues
KW - galaxies: high-redshift
KW - galaxies: photometry
KW - galaxies: statistics
U2 - 10.1093/mnras/stx2385
DO - 10.1093/mnras/stx2385
M3 - Article
VL - 473
SP - 2098
EP - 2123
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 2
ER -