TY - JOUR
T1 - The Dwarf Galaxy Population at z ∼ 0.7: A Catalog of Emission Lines and Redshifts from Deep Keck Observations
AU - Pharo, John
AU - Guo, Yicheng
AU - Calvo, Guillermo Barro
AU - Carleton, Timothy
AU - Faber, S. M.
AU - Guhathakurta, Puragra
AU - Kassin, Susan A.
AU - Koo, David C.
AU - Lonergan, Jack
AU - Teppala, Teja
AU - Wang, Weichen
AU - Yesuf, Hassen M.
AU - Bian, Fuyan
AU - Dave, Romeel
AU - Forbes, John C.
AU - Keres, Dusan
AU - Perez-Gonzalez, Pablo
AU - Martin, Alec
AU - Puleo, A. J.
AU - Williams, Lauryn
AU - Winningham, Benjamin
N1 - 23 pages, 19 Figures, updated to version accepted by ApJS
Funding Information:
We would like to thank the anonymous referee for their many helpful comments. J.P. and Y.G. would like to acknowledge support from NASA's Astrophysics Data Analysis Program (ADAP) grant No. 80NSSC20K0443. S.A.K. and W.W. would like to acknowledge support from NASA ADAP grant No. 80NSSC20K0760. We acknowledge support from NSF grant AST-1615730. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration et al. , ). We recognize and acknowledge the significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to use observations conducted from this mountain.
Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.
PY - 2022/7/20
Y1 - 2022/7/20
N2 - We present a catalog of spectroscopically measured redshifts over 0<z<2
and emission line fluxes for 1440 galaxies. The majority (∼65\%) of the
galaxies come from the HALO7D survey, with the remainder from the DEEPwinds
program. This catalog includes redshifts for 646 dwarf galaxies with
log(M⋆/M⊙)<9.5. 810 catalog galaxies did not have previously
published spectroscopic redshifts, including 454 dwarf galaxies. HALO7D used
the DEIMOS spectrograph on the Keck II telescope to take very deep (up to 32
hours exposure, with a median of ∼7 hours) optical spectroscopy in the
COSMOS, EGS, GOODS-North, and GOODS-South CANDELS fields, and in some areas
outside CANDELS. We compare our redshift results to existing spectroscopic and
photometric redshifts in these fields, finding only a 1\% rate of discrepancy
with other spectroscopic redshifts. We measure a small increase in median
photometric redshift error (from 1.0\% to 1.3\%) and catastrophic outlier rate
(from 3.5\% to 8\%) with decreasing stellar mass. We obtained successful
redshift fits for 75\% of massive galaxies, and demonstrate a similar 70-75\%
successful redshift measurement rate in 8.5<log(M⋆/M⊙)<9.5
galaxies, suggesting similar survey sensitivity in this low-mass range. We
describe the redshift, mass, and color-magnitude distributions of the catalog
galaxies, finding HALO7D galaxies representative of CANDELS galaxies up to
\textit{i}-band magnitudes of 25. The catalogs presented will enable studies of
star formation (SF), the mass-metallicity relation, SF-morphology relations,
and other properties of the z∼0.7 dwarf galaxy population.
AB - We present a catalog of spectroscopically measured redshifts over 0<z<2
and emission line fluxes for 1440 galaxies. The majority (∼65\%) of the
galaxies come from the HALO7D survey, with the remainder from the DEEPwinds
program. This catalog includes redshifts for 646 dwarf galaxies with
log(M⋆/M⊙)<9.5. 810 catalog galaxies did not have previously
published spectroscopic redshifts, including 454 dwarf galaxies. HALO7D used
the DEIMOS spectrograph on the Keck II telescope to take very deep (up to 32
hours exposure, with a median of ∼7 hours) optical spectroscopy in the
COSMOS, EGS, GOODS-North, and GOODS-South CANDELS fields, and in some areas
outside CANDELS. We compare our redshift results to existing spectroscopic and
photometric redshifts in these fields, finding only a 1\% rate of discrepancy
with other spectroscopic redshifts. We measure a small increase in median
photometric redshift error (from 1.0\% to 1.3\%) and catastrophic outlier rate
(from 3.5\% to 8\%) with decreasing stellar mass. We obtained successful
redshift fits for 75\% of massive galaxies, and demonstrate a similar 70-75\%
successful redshift measurement rate in 8.5<log(M⋆/M⊙)<9.5
galaxies, suggesting similar survey sensitivity in this low-mass range. We
describe the redshift, mass, and color-magnitude distributions of the catalog
galaxies, finding HALO7D galaxies representative of CANDELS galaxies up to
\textit{i}-band magnitudes of 25. The catalogs presented will enable studies of
star formation (SF), the mass-metallicity relation, SF-morphology relations,
and other properties of the z∼0.7 dwarf galaxy population.
KW - astro-ph.GA
U2 - 10.3847/1538-4365/ac6cdf
DO - 10.3847/1538-4365/ac6cdf
M3 - Article
VL - 261
SP - 1
EP - 18
JO - Astrophysical Journal Supplement
JF - Astrophysical Journal Supplement
SN - 0067-0049
IS - 2
M1 - 12
ER -