J/MNRAS/490/613 Galaxies and groups around the WFI 2033-4723 lens (Sluse+, 2019)
H0LiCOW - X.
Spectroscopic/imaging survey and galaxy-group identification around the strong
gravitational lens system WFI 2033-4723.
Sluse D., Rusu C.E., Fassnacht C.D., Sonnenfeld A., Richard J., Auger M.W.,
Coccato L., Wong K.C., Suyu S.H., Treu T., Agnello A., Birrer S.,
Bonvin V., Collett T., Courbin F., Hilbert S., Koopmans L.V.E.,
Tihhanova O., Marshall P.J., Meylan G., Shajib A.J., Annis J., Avila S.,
Bertin E., Brooks D., Buckley-Geer E., Burke D.L., Carnero Rosell A.,
Carrasco Kind M., Carretero J., Castander F.J., da Costa L.N.,
De Vicente J., Desai S., Doel P., Evrard A.E., Flaugher B., Frieman J.,
Garcia-Bellido J., Gerdes D.W., Goldstein D.A., Gruendl R.A., Gschwend J.,
Hartley W.G., Hollowood D.L., Honscheid K., James D.J., Kim A.G.,
Krause E., Kuehn K., Kuropatkin N., Lima M., Lin H., Maia M.A.G.,
Marshall J.L., Melchior P., Menanteau F., Miquel R., Plazas A.A.,
Sanchez E., Serrano S., Sevilla-Noarbe I., Smith M., Soares-Santos M.,
Sobreira F., Suchyta E., Swanson M.E.C., Tarle G.
<Mon. Not. R. Astron. Soc., 490, 613-633 (2019)>
=2019MNRAS.490..613S 2019MNRAS.490..613S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry ; Galaxies, spectra ; Redshifts ;
Gravitational lensing ; Velocity dispersion ; Optical ; Infrared
Keywords: gravitational lensing: strong - galaxies: groups: general -
quasars: individual: WFI 2033-4723
Abstract:
Galaxies and galaxy groups located along the line of sight towards
gravitationally lensed quasars produce high-order perturbations of the
gravitational potential at the lens position. When these perturbation
are too large, they can induce a systematic error on H0 of a few per
cent if the lens system is used for cosmological inference and the
perturbers are not explicitly accounted for in the lens model. In this
work, we present a detailed characterization of the environment of the
lens system WFI 2033-4723 (zsrc=1.662, zlens=0.6575), one of the
core targets of the H0LiCOW project for which we present cosmological
inferences in a companion paper. We use the Gemini and ESO-Very Large
telescopes to measure the spectroscopic redshifts of the brightest
galaxies towards the lens, and use the ESO-MUSE integral field
spectrograph to measure the velocity-dispersion of the lens
(σlos=250+15-21km/s) and of several nearby galaxies. In
addition, we measure photometric redshifts and stellar masses of all
galaxies down to i<23mag, mainly based on Dark Energy Survey imaging
(DR1). Our new catalogue, complemented with literature data, more than
doubles the number of known galaxy spectroscopic redshifts in the
direct vicinity of the lens, expanding to 116 (64) the number of
spectroscopic redshifts for galaxies separated by less than 3arcmin
(2arcmin) from the lens. Using the flexion-shift as a measure of the
amplitude of the gravitational perturbation, we identify two galaxy
groups and three galaxies that require specific attention in the lens
models. The ESO MUSE data enable us to measure the
velocity-dispersions of three of these galaxies. These results are
essential for the cosmological inference analysis presented in
Rusu et al. (2020MNRAS.498.1420W 2020MNRAS.498.1420W).
Description:
We base our analysis mainly on grizY-band DES data included in the DR1
(Abbott et al. 2018ApJS..239...18A 2018ApJS..239...18A, Cat. II/357). We supplement this
with proprietary deep u-band data observed on 2015 July 21 and 22 (PI.
C.E. Rusu) with the Dark Energy Survey Camera (Flaugher et al.
2015AJ....150..150F 2015AJ....150..150F) on the Blanco Telescope; VLT/HAWK-I (Pirard et
al. 2004SPIE.5492.1763P 2004SPIE.5492.1763P; Kissler-Patig et al. 2008A&A...491..941K 2008A&A...491..941K)
near-infrared data [PI. C.D. Fassnacht, program ID 090.A-0531(A)]
observed on 2012 October 12; and with archival IRAC (Fazio et al.
2004ApJS..154...10F 2004ApJS..154...10F) infrared data from the Spitzer Space Telescope
(PI. C.S. Kochanek, program ID 20451), observed on 2005 October 20 and
2006 June 4.
For the spectroscopy, we used the MXU capabilities of the FORS2
instrument (Appenzeller et al. 1998Msngr..94....1A 1998Msngr..94....1A) mounted at the
Cassegrain focus of the UT1 (Antu) telescope (PID: 091.A-0642(A), PI:
D. Sluse), and the multi-object spectroscopy mode of the Gemini
Multi-Object Spectrographs (GMOS; Hook et al. 2004PASP..116..425H 2004PASP..116..425H) at
the Gemini-South telescope (PID: GS-2013A-Q-2, PI: T. Treu).
Finally, we have complemented the data with the spectroscopic
catalogue from Momcheva et al. (2015ApJS..219...29M 2015ApJS..219...29M, Cat.
J/ApJS/219/29) who spectroscopically measured the redshift of galaxies
distant by up to 15arcmin from WFI 2033-4723. And we have also used
the exceptional capabilities of the ESO-MUSE integral-field
spectrograph to derive spectroscopic redshift of the object closer in
projection from the lens.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 72 367 Spectroscopic redshift catalogue
table3.dat 88 9 Properties of the groups identified in the FOV
of WFI 2033-4723
tablec23.dat 202 169 Photometric properties, measured redshifts and
stellar masses of the i=<23 galaxies inside
120arcsec of WFI 2033-4723
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See also:
II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)
J/ApJS/219/29 : Spectroscopic redshifts in strong lens fields
(Momcheva+, 2015)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- Name Galaxy name (InstrumentdateobjID) (1)
24- 28 I5 --- ID [36/24649] Galaxy identifier
30- 39 F10.6 deg RAdeg Right ascension (J2000)
41- 50 F10.6 deg DEdeg Declination (J2000)
52- 59 F8.6 --- z Redshift
61- 68 F8.6 --- e_z Error on z
70 A1 --- q_z [0346] Quality flag on z (2)
72 A1 --- Type Object type (3)
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Note (1): Instrument is FORS, GMOS (Gemini), or MUSE if the redshift is derived
from our survey, and MOM15 if the redshift comes from Momcheva et al.
(2015ApJS..219...29M 2015ApJS..219...29M, Cat. J/ApJS/219/29). The date is in format
yyyymmdd, or 201508 for objects from Momcheva. Momcheva objects
as [MWC2015] WFI J2033-4723 NNNNN in Simbad.
Note (2): Quality flag as follows:
0 = Redshift is extracted from this program, secure redshift (129/367)
3 = Object from Momcheva et al. (2015ApJS..219...29M 2015ApJS..219...29M, Cat. J/ApJS/219/29),
data obtained with LDSS-3 (18/367)
4 = Object from Momcheva et al. (2015ApJS..219...29M 2015ApJS..219...29M, Cat. J/ApJS/219/29),
data obtained with IMACS (219/367)
6 = Object from Momcheva et al. (2015ApJS..219...29M 2015ApJS..219...29M, Cat. J/ApJS/219/29),
NED object (1/367)
Note (3): Object type as follows:
A = ETG-Sx type, CaK-H and/or G band are detected (47/367)
E = Starburst type, clear emission lines are observed (65/367)
Q = Star (1/367)
U = Unknown type, no identification could be done or the spectrum is from
an external catalogue (254/367)
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- ID Group identification
6- 11 F6.4 --- zgroup Group redshift
13- 15 A3 --- f_zgroup Flag on zgroup (1)
17- 18 I2 --- N Number of spectroscopically identified
galaxies in the group
20- 22 I3 km/s vdisp Group intrinsic velocity-dispersion (rounded
to the nearest 10km/s)
24- 26 I3 km/s e_vdisp Error on vdisp (2)
28- 39 F12.8 deg RAdeg Right ascension (J2000) of the group centroid
41- 52 F12.8 deg DEdeg Declination (J2000) of the group centroid
54- 58 F5.1 arcsec e_RAdeg Error on RAdeg (2)
60- 63 F4.1 arcsec e_DEdeg Error on DEdeg (2)
65- 69 F5.1 arcsec Dtheta Projected distance of the centroid to the lens
71- 75 F5.2 [arcsec] logD3x Logarithm of the median flexion shift
Δ3x (3)
77- 80 F4.2 [arcsec] e_logD3x Error on logDx3 (2)
82- 88 A7 arcmin FOV Field for which a peak of more than five
galaxies is detected in redshift space (4)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
a = Results from the breakdown of a larger multimodal group candidate
b = Likely spurious
c = Apparently bimodal but unsuccessful breakdown into sub-group(s)
Note (2): Errors correspond to 1σ standard deviation from bootstrap
Note (3): The flexion shift Δ3x, can be written as
Δ3x=f(β)(θEθE,p)2/θ3 where
θE and θE,p are the Einstein radii of the main lens
and of the perturber, and θ is the angular separation on the
sky between the lens and the perturber.
Note (4): For groups a3 and a5, properties are given for FOV=360arcmin
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Byte-by-byte Description of file: tablec23.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right ascension (J2000)
11- 19 F9.5 deg DEdeg Declination (J2000)
21- 25 F5.2 mag umag ? DECam u-band magnitude
27- 30 F4.2 mag e_umag ? Error on umag
32- 36 F5.2 mag gmag ? DES g-band magnitude
38- 41 F4.2 mag e_gmag ? Error on gmag
43- 47 F5.2 mag rmag ? DES r-band magnitude
49- 52 F4.2 mag e_rmag ? Error on rmag
54- 58 F5.2 mag imag DES i-band magnitude
60- 63 F4.2 mag e_imag Error on imag
65- 69 F5.2 mag zmag ? DES z-band magnitude
71- 74 F4.2 mag e_zmag ? Error on zmag
76- 80 F5.2 mag Ymag ? DES Y-band magnitude
82- 85 F4.2 mag e_Ymag ? Error on Ymag
87- 91 F5.2 mag Jmag ? HAWK-I J-band magnitude
93- 96 F4.2 mag e_Jmag ? Error on Jmag
98-102 F5.2 mag Hmag ? HAWK-I H-band magnitude
104-107 F4.2 mag e_Hmag ? Error on Hmag
109-113 F5.2 mag Kmag ? HAWK-I K-band magnitude
115-118 F4.2 mag e_Kmag ? Error on Kmag
120-124 F5.2 mag 3.6mag IRAC 3.6um magnitude
126-129 F4.2 mag e_3.6mag Error on 3.6mag
131-135 F5.2 mag 4.5mag ? IRAC 4.5um magnitude
137-140 F4.2 mag e_4.5mag ? Error on 4.5mag
142-146 F5.2 mag 5.7mag ? IRAC 5.7um magnitude
148-151 F4.2 mag e_5.7mag ? Error on 5.7mag
153-157 F5.2 mag 7.9mag ? IRAC 7.9um magnitude
159-162 F4.2 mag e_7.9mag ? Error on 7.9mag
164-168 F5.1 arcsec Sep Galaxy separation from the lens
170-174 F5.3 --- zspec Measured spectroscopic redshift
176-180 F5.3 --- e_zspec Upper error on zspec
182-186 F5.3 --- E_zspec Lower error on zspec
188-192 F5.2 [Msun] logM* Logarithm of the galaxy stellar mass
194-197 F4.2 [Msun] e_logM* Upper error on logM*
199-202 F4.2 [Msun] E_logM* Lower error on logM*
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History:
From electronic version of the journal
References:
Suyu et al. Paper I 2017MNRAS.468.2590S 2017MNRAS.468.2590S
Sluse et al. Paper II 2017MNRAS.470.4838S 2017MNRAS.470.4838S
Rusu et al., Paper III 2017MNRAS.467.4220R 2017MNRAS.467.4220R, Cat. J/MNRAS/467/4220
Wong et al., Paper IV 2017MNRAS.465.4895W 2017MNRAS.465.4895W
Bonvin et al., Paper V 2017MNRAS.465.4914B 2017MNRAS.465.4914B, Cat. J/MNRAS/465/4914
Ding et al., Paper VI 2017MNRAS.465.4634D 2017MNRAS.465.4634D
Ding et al., Paper VII 2017MNRAS.472...90D 2017MNRAS.472...90D
Tihhonova et al., Paper VIII 2018MNRAS.477.5657T 2018MNRAS.477.5657T
Birrer et al., Paper IX 2019MNRAS.484.4726B 2019MNRAS.484.4726B
Tihhonova et al., Paper XI 2020MNRAS.498.1406T 2020MNRAS.498.1406T
Rusu et al., Paper XII 2020MNRAS.498.1440R 2020MNRAS.498.1440R
Wong et al., Paper XIII 2020MNRAS.498.1420W 2020MNRAS.498.1420W
(End) Ana Fiallos [CDS] 25-Jan-2023