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J/ApJ/841/7   Spectroscopic obs & members of ZwCl 2341+0000   (Benson+, 2017)

MC2: a deeper look at ZwCl 2341.1+0000 with Bayesian galaxy clustering and weak lensing analyses. Benson B., Wittman D.M., Golovich N., Jee M.J., van Weeren R.J., Dawson W.A. <Astrophys. J., 841, 7 (2017)> =2017ApJ...841....7B
ADC_Keywords: Clusters, galaxy ; Galaxies, optical ; Spectroscopy ; Redshifts Keywords: galaxies: clusters: general ; gravitational lensing: weak galaxies: clusters: individual (ZwCl 2341.1+0000) Abstract: ZwCl 2341.1+0000, a merging galaxy cluster with disturbed X-ray morphology and widely separated (∼3Mpc) double radio relics, was thought to be an extremely massive (10-30x1014M) and complex system, with little known about its merger history. We present JVLA 2-4GHz observations of the cluster, along with new spectroscopy from our Keck/DEIMOS survey, and apply Gaussian Mixture Modeling to the three-dimensional distribution of 227 confirmed cluster galaxies. After adopting the Bayesian Information Criterion to avoid overfitting, which we discover can bias high the total dynamical mass estimates, we find that a three-substructure model with a total dynamical mass estimate of 9.39±0.81x1014M is favored. We also present deep Subaru imaging and perform the first weak lensing analysis on this system, obtaining a weak lensing mass estimate of 5.57±2.47x1014M. This is a more robust estimate because it does not depend on the dynamical state of the system, which is disturbed due to the merger. Our results indicate that ZwCl2341.1+0000 is a multiple merger system comprised of at least three substructures, with the main merger that produced the radio relics occurring near the plane of the sky, and a younger merger in the north occurring closer to the line of sight. Dynamical modeling of the main merger reproduces observed quantities (relic positions and polarizations, subcluster separation and radial velocity difference), if the merger axis angle of ∼10-6+34 degrees and the collision speed at pericenter is ∼1900-200+300km/s. Description: We observed ZwCl 2341.1+0000 using the Subaru Prime Focus Camera (SuprimeCam) with the 8.2 m Subaru telescope at the National Astronomical Observatory of Japan on Maunakea (P.I. D. Wittman). We carried out the observations over two nights (2013 February 23-24) in the g' and r' bands. We conducted a spectroscopic survey of ZwCl 2341.1+0000 with the DEIMOS instrument on the Keck II 10m telescope over two separate observing runs, with two observations performed on 2013 July 14 and one performed on 2013 September 5. ZwCl 2341.1+0000 was observed with the Karl G. Jansky Very Large Array (JVLA) in the ∼2-4GHz on 2015 Oct 19 and 2014 Oct 09. Objects: --------------------------------------------------------------- RA (ICRS) DE Designation(s) --------------------------------------------------------------- 23 43 40.57 +00 18 18.9 ZwCl 2341.1+0000 = ZwCl 2341+0000 --------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . this file table2.dat 42 227 Spectroscopic cluster member catalog
See also: V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012) J/ApJ/702/1230 : Rotation measure image of the sky (Taylor+, 2009) J/MNRAS/434/772 : Velocities in ZwCl2341.1+0000 field (Boschin+, 2013) J/ApJ/772/131 : Musket Ball Cluster redshift catalog (Dawson, 2013) J/ApJ/805/143 : MC2: redshift analysis of CIZA J2242.8+5301 (Dawson+, 2015) J/ApJ/813/77 : Galaxy clusters: radio halos, relics & param. (Yuan+, 2015) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh [23] Right Ascension (J2000) (hours) 4- 5 I2 min RAm [43/44] Right Ascension (J2000) (minutes) 7- 11 F5.2 s RAs Right Ascension (J2000) (seconds) 13 A1 --- DE- [+] Declination (J2000) (sign) 14- 15 I2 deg DEd [0] Declination (J2000) (degrees) 17- 18 I2 arcmin DEm [10/25] Declination (J2000) (minutes) 20- 24 F5.2 arcsec DEs Declination (J2000) (seconds) 26- 33 F8.6 --- z [0.2587/0.2836] Redshift 35- 42 F8.6 --- e_z [/0.0002] Uncertainty on Redshift
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 12-Jan-2018
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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