J/ApJ/930/156 MMT/Hectospec spectra of ACO 1489 (Rines+, 2022)
A spectroscopic view of the JWST/GTO strong lensing cluster A1489.
Rines K.J., Sohn J., Geller M.J., Diaferio A.
<Astrophys. J., 930, 156 (2022)>
=2022ApJ...930..156R 2022ApJ...930..156R
ADC_Keywords: Clusters, galaxy; Spectra, optical; Redshifts; Surveys;
Velocity dispersion; Photometry; Colors
Keywords: Galaxy clusters ; Redshift surveys
Abstract:
We discuss a spectroscopic survey of the strong lensing cluster A1489
that includes redshifts for 195 cluster members along with central
velocity dispersions for 188 cluster members. The caustic technique
applied to the redshift survey gives the dynamical parameters
M200=(1.25±0.09)x1015M☉, R200=1.97±0.05Mpc, and a
cluster line-of-sight velocity dispersion of 1150±72km/s within
R200. These parameters are very similar to those of other strong
lensing systems with comparably large Einstein radii. We use the
spectroscopy and deep photometry to demonstrate that A1489 is probably
dynamically active; its four brightest cluster galaxies have
remarkably different rest-frame radial velocities. Like other massive
strong lensing clusters, the velocity dispersion function for members
of A1489 shows an excess for dispersions ≳250km/s. The central
dispersions also provide enhanced constraints on future lensing models.
Description:
Here we discuss a redshift survey carried out in 2007 as part of an
exploration of 10 clusters in the Chandra Cluster Cosmology Project.
We based the original selection of spectroscopic targets on the SDSS
DR6. Recent DECaLS photometry (Dey+ 2019AJ....157..168D 2019AJ....157..168D) is a substantial
improvement over the SDSS. We thus match the survey catalog to DECaLS.
See Section 3.1.
In 2007 May and June, we acquired spectra with Hectospec, a 300-fiber
instrument with a 1° field mounted on the MMT 6.5m telescope.
See Section 3.2.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
12 12 19.19 +27 33 13.9 A1489 = ACO 1489
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 109 1008 A1489 redshift survey
--------------------------------------------------------------------------------
See also:
VII/4 : Abell and Zwicky Clusters of Galaxies (Abell+ 1974)
II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)
VIII/91 : Planck Catalog of Compact Sources Release 1 (Planck, 2013)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
VII/292 : DESI Legacy Imaging Surveys DR8 photometric redshifts (Duncan, 2022)
J/AJ/132/1275 : CIRS (Cluster Infall Regions in the SDSS). I. (Rines+, 2006)
J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)
J/ApJS/172/561 : The 400d cluster Survey (Burenin+, 2007)
J/MNRAS/404/325 : Massive galaxy clusters lensing analyse (Richard+, 2010)
J/ApJ/767/15 : Hectospec Cluster Survey (HeCS) (Rines+, 2013)
J/ApJS/213/35 : SHELS: galaxy redshift survey for R≤20.6 (Geller+, 2014)
J/ApJ/785/104 : redMaPPer. I. Algorithm applied to SDSS DR8 (Rykoff+, 2014)
J/ApJS/224/33 : CLASH-VLT: the FF cluster MACS J0416.1-2403 (Balestra+, 2016)
J/A+A/594/A27 : Planck Sunyaev-Zeldovich sources (PSZ2) (Planck+, 2016)
J/ApJS/224/1 : redMaPPer cluster catalog from DES data (Rykoff+, 2016)
J/ApJS/229/20 : MMT/Hectospec redshift survey for Abell 2029 (Sohn+, 2017)
J/MNRAS/473/663 : MUSE and HFFs Photometry of A2744 (Mahler+, 2018)
J/ApJ/889/189 : Brightest high-z galaxies in RELICS clusters (Salmon+, 2020)
J/ApJ/894/78 : Strong gravitational lenses from DECaLS (Huang+, 2020)
J/ApJ/902/17 : Spectroscopy of quiescent gal. in 9 lensing cl. (Sohn+, 2020)
J/ApJ/891/129 : The HeCS-omnibus catalog: SDSS & MMT sp. obs. (Sohn+, 2020)
J/A+A/646/A83 : 12 massive lensing clusters MUSE obs. (Richard+, 2021)
J/ApJ/909/129 : HectoMAP redshift survey DR1 (Sohn+, 2021)
J/A+A/659/A126 : PSZ2 cluster candidates. III. (Aguado-Barahona+, 2022)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- ObjID SDSS Object ID of BCGs
21- 30 F10.6 deg RAdeg [182.5/183.7] Right Ascension (J2000)
32- 40 F9.6 deg DEdeg [27/28.1] Declination (J2000)
42- 50 F9.6 --- z [-0.0004/1.3] Redshift
52- 59 F8.6 --- e_z [5e-06/0.2] Uncertainty in z
61- 65 F5.2 --- rmag [13.72/21.31] DeCALS r-band AB magnitude
67- 70 F4.2 --- g-r [0.16/2] DeCALS (g-r) color
72- 75 F4.2 --- dn4000 [0.9/3.3]?=0 Dn4000
77- 81 F5.2 --- e_dn4000 [0.01/0.5]?=-8.8 Uncertainty in Dn4000
83- 87 F5.2 [Msun] Mass [8.8/11.7]? log stellar mass
89- 92 F4.2 [Msun] e_Mass [0.03/0.4]? Lower uncertainty in Mass
94- 97 F4.2 [Msun] E_Mass [0.03/0.4]? Upper uncertainty in Mass
99-101 I3 km/s Vdisp [31/778]? Velocity Dispersion
103-105 I3 km/s e_Vdisp [2/479]? Uncertainty in Vdisp
107 A1 --- Mm Membership Flag (Y=member; 192 occurrences)
109 A1 --- SpSDSS SDSS spectroscopy (Y=SDSS sp. available)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-Mar-2024