The deep, wide-area (900 arcmin**2) near-IR/WFC3/IR + Spitzer/IRAC
observations over the CANDELS program represents a significant resource for
constraining the bright end of the z~9 and z~10 luminosity functions (LFs) in
the UV. We recently reported the discovery of 6 luminous z~9-10 candidates over
the GOODS-North+South fields, but extending this search to the full CANDELS
program was limited due to the lack of HST-depth 1.05-micron observations in
the other 3 CANDELS fields. Here we attempt to significantly realize the
potential of CANDELS for z=9-10 science by combining a search over all 5 fields
with results from a new HST program (B9-CANDELS) designed to follow up the
highest-probability z~9-10 galaxy candidates with observations at 1.05 microns.
The targeted z~9-10 candidates are preselected by taking advantage of the full
HST, Spitzer/IRAC S-CANDELS observations, and the deepest-available
ground-based optical+near-IR observations. With our follow-up program now 91%
complete, we identify 4 new high-probability z~9-10 galaxies. This brings our
total sample of bright z~9-10 galaxies to 14, including several other new
sources from the CANDELS GOODS + ERS fields.Through extensive simulations, we
replicate the selection process for our sample (both the preselection and
follow-up) and obtain an accurate estimate of the volume density of bright
galaxies (M_UV,AB<-20) at both z~9 and z~10. The volume density of bright z~9
and z~10 galaxies that we find is 4.5(-1.3)(+2.5)x and 8(-3)(+7)x lower than
found at z~8. When compared with the best-fit evolution in the UV luminosities
densities from z~8 to z~4 (>0.4L*), the luminosity densities we find at z~9 and
z~10 are ~2x lower than the extrapolated trends. We would expect significant
additional gains in these results from the on-going 500-orbit BoRGz910
program and by obtaining additional follow-up observations over the
CANDELS-WIDE fields.
Description
[1506.01035] Most Luminous z=9-10 Galaxies: A First Determination of the Bright End of the z~9 and z~10 UV Luminosity Functions using all five CANDELS Fields
%0 Generic
%1 bouwens2015luminous
%A Bouwens, R. J.
%A Oesch, P. A.
%A Labbe, I.
%A Illingworth, G. D.
%A Fazio, G.
%A Coe, D.
%A Holwerda, B.
%A Smit, R.
%A Stefanon, M.
%A van Dokkum, P. G.
%A Trenti, M.
%A Ashby, M.
%A Huang, J.
%A Spitler, L.
%A Straatman, C.
%A Bradley, L.
%A Magee, D.
%D 2015
%K function galaxy high-z luminousity
%T Most Luminous z=9-10 Galaxies: A First Determination of the Bright End
of the z~9 and z~10 UV Luminosity Functions using all five CANDELS Fields
%U http://arxiv.org/abs/1506.01035
%X The deep, wide-area (900 arcmin**2) near-IR/WFC3/IR + Spitzer/IRAC
observations over the CANDELS program represents a significant resource for
constraining the bright end of the z~9 and z~10 luminosity functions (LFs) in
the UV. We recently reported the discovery of 6 luminous z~9-10 candidates over
the GOODS-North+South fields, but extending this search to the full CANDELS
program was limited due to the lack of HST-depth 1.05-micron observations in
the other 3 CANDELS fields. Here we attempt to significantly realize the
potential of CANDELS for z=9-10 science by combining a search over all 5 fields
with results from a new HST program (B9-CANDELS) designed to follow up the
highest-probability z~9-10 galaxy candidates with observations at 1.05 microns.
The targeted z~9-10 candidates are preselected by taking advantage of the full
HST, Spitzer/IRAC S-CANDELS observations, and the deepest-available
ground-based optical+near-IR observations. With our follow-up program now 91%
complete, we identify 4 new high-probability z~9-10 galaxies. This brings our
total sample of bright z~9-10 galaxies to 14, including several other new
sources from the CANDELS GOODS + ERS fields.Through extensive simulations, we
replicate the selection process for our sample (both the preselection and
follow-up) and obtain an accurate estimate of the volume density of bright
galaxies (M_UV,AB<-20) at both z~9 and z~10. The volume density of bright z~9
and z~10 galaxies that we find is 4.5(-1.3)(+2.5)x and 8(-3)(+7)x lower than
found at z~8. When compared with the best-fit evolution in the UV luminosities
densities from z~8 to z~4 (>0.4L*), the luminosity densities we find at z~9 and
z~10 are ~2x lower than the extrapolated trends. We would expect significant
additional gains in these results from the on-going 500-orbit BoRGz910
program and by obtaining additional follow-up observations over the
CANDELS-WIDE fields.
@misc{bouwens2015luminous,
abstract = {The deep, wide-area (900 arcmin**2) near-IR/WFC3/IR + Spitzer/IRAC
observations over the CANDELS program represents a significant resource for
constraining the bright end of the z~9 and z~10 luminosity functions (LFs) in
the UV. We recently reported the discovery of 6 luminous z~9-10 candidates over
the GOODS-North+South fields, but extending this search to the full CANDELS
program was limited due to the lack of HST-depth 1.05-micron observations in
the other 3 CANDELS fields. Here we attempt to significantly realize the
potential of CANDELS for z=9-10 science by combining a search over all 5 fields
with results from a new HST program (B9-CANDELS) designed to follow up the
highest-probability z~9-10 galaxy candidates with observations at 1.05 microns.
The targeted z~9-10 candidates are preselected by taking advantage of the full
HST, Spitzer/IRAC S-CANDELS observations, and the deepest-available
ground-based optical+near-IR observations. With our follow-up program now 91%
complete, we identify 4 new high-probability z~9-10 galaxies. This brings our
total sample of bright z~9-10 galaxies to 14, including several other new
sources from the CANDELS GOODS + ERS fields.Through extensive simulations, we
replicate the selection process for our sample (both the preselection and
follow-up) and obtain an accurate estimate of the volume density of bright
galaxies (M_{UV,AB}<-20) at both z~9 and z~10. The volume density of bright z~9
and z~10 galaxies that we find is 4.5(-1.3)(+2.5)x and 8(-3)(+7)x lower than
found at z~8. When compared with the best-fit evolution in the UV luminosities
densities from z~8 to z~4 (>0.4L*), the luminosity densities we find at z~9 and
z~10 are ~2x lower than the extrapolated trends. We would expect significant
additional gains in these results from the on-going 500-orbit BoRG[z910]
program and by obtaining additional follow-up observations over the
CANDELS-WIDE fields.},
added-at = {2015-06-04T10:22:36.000+0200},
author = {Bouwens, R. J. and Oesch, P. A. and Labbe, I. and Illingworth, G. D. and Fazio, G. and Coe, D. and Holwerda, B. and Smit, R. and Stefanon, M. and van Dokkum, P. G. and Trenti, M. and Ashby, M. and Huang, J. and Spitler, L. and Straatman, C. and Bradley, L. and Magee, D.},
biburl = {https://www.bibsonomy.org/bibtex/29c37eed3503c03c093710c8e366cd814/miki},
description = {[1506.01035] Most Luminous z=9-10 Galaxies: A First Determination of the Bright End of the z~9 and z~10 UV Luminosity Functions using all five CANDELS Fields},
interhash = {55b97085c16c229cc01724923c8af97e},
intrahash = {9c37eed3503c03c093710c8e366cd814},
keywords = {function galaxy high-z luminousity},
note = {cite arxiv:1506.01035Comment: 22 pages, 14 figures, 6 tables, submitted to the Astrophysical Journal},
timestamp = {2015-06-04T10:22:36.000+0200},
title = {Most Luminous z=9-10 Galaxies: A First Determination of the Bright End
of the z~9 and z~10 UV Luminosity Functions using all five CANDELS Fields},
url = {http://arxiv.org/abs/1506.01035},
year = 2015
}