J/ApJ/868/129 Lensing analysis in Abell 370 (Strait+, 2018)
Mass and light of Abell 370: a strong and weak lensing analysis.
Strait V., Bradac M., Hoag A., Huang K.-H., Treu T., Wang X., Amorin R.,
Castellano M., Fontana A., Lemaux B.-C., Merlin E., Schmidt K.B.,
Schrabback T., Tomczack A., Trenti M., Vulcani B.
<Astrophys. J., 868, 129 (2018)>
=2018ApJ...868..129S 2018ApJ...868..129S
ADC_Keywords: Clusters, galaxy; Gravitational lensing; Redshifts; Infrared
Keywords: galaxies: clusters: individual (Abell 370) ; galaxies: high-redshift
Abstract:
We present a new gravitational lens model of the Hubble Frontier
Fields cluster Abell 370 (z=0.375) using imaging and spectroscopy from
Hubble Space Telescope and ground-based spectroscopy. We combine
constraints from a catalog of 909 weakly lensed galaxies and 39
multiply imaged sources comprised of 114 multiple images, including a
system of multiply imaged candidates at z=7.84±0.02, to obtain a
best-fit mass distribution using the cluster lens modeling code strong
and weak lensing united. As the only analysis of A370 using strong and
weak lensing constraints from Hubble Frontier Fields (HFF) data, our
method provides an independent check of assumptions on the mass
distribution used in other methods. Convergence, shear, and
magnification maps are made publicly available through the HFF website
(http://www.stsci.edu/hst/campaigns/frontier-fields). We find that the
model we produce is similar to models produced by other groups, with
some exceptions due to the differences in lensing code methodology. In
an effort to study how our total projected mass distribution traces
light, we measure the stellar mass density distribution using
Spitzer/Infrared array camera imaging. Comparing our total mass
density to our stellar mass density in a radius of 0.3Mpc, we find a
mean projected stellar to total mass ratio of <f*≥0.011±0.003
(stat.) using the diet Salpeter initial mass function. This value is
in general agreement with independent measurements of <f*> in clusters
of similar total mass and redshift.
Description:
A combination of programs from the Hubble Space Telescope (HST), the
Very Large Telescope/High Acuity Wide-field K-band Imager
(VLT/HAWK-I), and the Spitzer/InfraRed Array Camera (IRAC) contribute
to the broadband flux density measurements used in this paper.
HST imaging is from HFF as well as a collection of other surveys
(PI: E. Hu #11108, PI: K. Noll #11507, PI: J.-P, Kneib #11591,
PI: T. Treu #13459, PI: R. Kirshner #14216), and consists of deep
imaging from the Advanced Camera for Surveys (ACS) in F435W
(20 orbits), F606W (10 orbits), and F814W (52 orbits) and images from
the Wide Field Camera 3 (WFC3) in F105W (25 orbits), F140W
(12 orbits), and F160W (28 orbits). These images were taken from the
Mikulski Archive for Space Telescope (MAST) and were also used for
visual inspection of multiply imaged systems.
Ultra-deep Spitzer/Infrared Array Camera (IRAC) images come from
Spitzer Frontier Fields (PI: T. Soifer, P. Capak;
Lotz+ 2017ApJ...837...97L 2017ApJ...837...97L; P. Capak et al. 2018, in preparation) and
are used for photometry and creation of a stellar mass map. These
images reach 1000h of total exposure time of the six frontier fields
clusters and parallel fields in each IRAC channel.
In addition to HST and Spitzer, we use data from K-band Imaging of the
Frontier Fields ("KIFF", Brammer+ 2016ApJS..226....6B 2016ApJS..226....6B), taken on
VLT/HAWK-I, reaching a total of 28.3hr exposure time for A370.
Spectra are obtained from a combination of MUSE (Lagattuta+
2017MNRAS.469.3946L 2017MNRAS.469.3946L ; Lagattuta+ 2019MNRAS.485.3738L 2019MNRAS.485.3738L) GTO observations
and the Grism Lens Amplified Survey from Space (GLASS; PI: Treu,
HST-GO-13459; Schmidt+ 2014ApJ...786...57S 2014ApJ...786...57S; Treu+, 2015, J/ApJ/812/114),
and are used for obtaining secure redshifts for our strong lensing
constraints.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 101 117 Multiply imaged arc systems behind A370
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See also:
J/A+A/407/791 : ACO 370, 2218 and 2390 fluxes at 7 and 15um (Metcalfe+, 2003)
J/ApJ/641/169 : Spectroscopy in lens fields (Momcheva+, 2006)
J/ApJ/660/239 : MaxBCG catalog of 13823 galaxy clusters SDSS (Koester+, 2007)
J/ApJ/703/2217 : Lensing measurement SDSS galaxy clusters. I. (Sheldon+, 2009)
J/ApJ/749/97 : Multiple lensed images in MCS J1206.2-0847 (Zitrin+, 2012)
J/ApJ/757/22 : Strong and weak lensing analysis of A2261 (Coe+, 2012)
J/ApJS/202/2 : VLA 1.4GHz observations of A370 and A2390 (Wold+, 2012)
J/MNRAS/444/268 : HST Frontier Fields clusters (Richard+, 2014)
J/ApJ/810/71 : UV mag of candidate galaxies 3<z<8.5 (Finkelstein+, 2015)
J/ApJ/812/114 : Grism Lens-Amplified Survey Space (GLASS). I. (Treu+, 2015)
J/ApJS/219/29 : Spectroscopic redshifts strong lens fields (Momcheva+, 2015)
J/ApJ/811/29 : GLASS. IV. Lensing cluster Abell 2744 (Wang+, 2015)
J/ApJ/819/114 : Lensing mass modeling of 4 HFF clusters (Kawamata+, 2016)
J/ApJ/822/78 : VLT/MUSE spectrosc. obs. of MACS J1149.5+2223 (Grillo+, 2016)
J/ApJ/831/182 : GLASS. VI. MCS J0416.1-2403 HFF image & spectre (Hoag+, 2016)
J/A+A/590/A31 : ASTRODEEP Frontier Fields Catalogues (Merlin+, 2016)
J/ApJ/833/178 : GLASS. VII. Hα maps (Vulcani+, 2016)
J/ApJ/835/113 : Galaxies >6 from Hubble Frontier Fields (Livermore+, 2017)
J/ApJ/834/210 : Spectroscopy strong lensing galaxy clusters (Carrasco+, 2017)
J/ApJ/854/73 : Full-data results of HFF: galaxies z∼6-9 (Ishigaki+, 2018)
J/ApJ/862/156 : High-z galaxy cand. in the HFF cluster fields (Leung+, 2018)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 F4.1 --- ID [1.1/40.3] Image identifier
6- 14 F9.6 deg RAdeg [39.95/39.99] Right ascension
in decimal degrees (J2000)
16- 25 F10.7 deg DEdeg [-1.59/-1.56] Declination
in decimal degrees (J2000)
27- 32 F6.4 --- z [0.7/7.9] Redshift used
34- 40 A7 --- QF Quality flag from 4 (best, determined by
multiple high S/N emission lines) to 1 (worst,
determined by one tentative, low S/N feature)
42-101 A60 --- Comm Reference(s) and comment (1)
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Note (1): Sources in Richard+ (2014, J/MNRAS/444/268) are <[RJL2014] A370 NN.N>
in Simbad.
References as follow:
L17 = Lagattuta et al. 2017MNRAS.469.3946L 2017MNRAS.469.3946L ; <[LRC2017] A370 NN.N> in Simbad
L18 = Lagattuta et al. 2019MNRAS.485.3738L 2019MNRAS.485.3738L
D18 = Diego et al. 2018MNRAS.473.4279D 2018MNRAS.473.4279D ; <[DSB2018] A370 NN.N> in Simbad.
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History:
From electronic version of the journal
(End) Prepared by Coralie FIX [CDS] 28-Oct-2019