2023ApJ...952...81F

Query : 2023ApJ...952...81F

2023ApJ...952...81F - Astrophys. J., 952, 81 (2023/July-3)

The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies.

FRYE B.L., PASCALE M., FOO N., LEIMBACH R., GARUDA N., SOTO ROBLES P., SUMMERS J., DIAZ C., KAMIENESKI P., FURTAK L.J., COHEN S.H., DIEGO J., BEAUCHESNE B., WINDHORST R.A., WILLNER S.P., KOEKEMOER A.M., ZITRIN A., CAMINHA G., CAPUTI K.I., COE D., CONSELICE C.J., DAI L., DOLE H., DRIVER S.P., GROGIN N.A., HARRINGTON K., JANSEN R.A., KNEIB J.-P., LEHNERT M., LOWENTHAL J., MARSHALL M.A., MENANTEAU F., ALCALDE PAMPLIEGA B., PIRZKAL N., POLLETTA M., RICHARD J., ROBOTHAM A., RYAN R.E.Jr, RUTKOWSKI M.J., SIFON C., TOMPKINS S., WANG D., YAN H. and YUN M.S.

Abstract (from CDS):

The massive galaxy cluster El Gordo (z = 0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were obtained in the “Prime Extragalactic Areas for Reionization and Lensing Science” (“PEARLS”) program. Point-spread function-matched photometry across Hubble Space Telescope and NIRCam filters supplies new photometric redshifts. A new light-traces-mass lens model based on 56 image multiplicities identifies the two mass peaks and yields a mass estimate within 500 kpc of (7.0 ± 0.30) × 1014M⊙. A search for substructure in the 140 cluster members with spectroscopic redshifts confirms the two main mass components. The southeastern mass peak that contains the brightest cluster galaxy is more tightly bound than the northwestern one. The virial mass within 1.7 Mpc is (5.1 ± 0.60)×1014M⊙, lower than the lensing mass. A significant transverse velocity component could mean the virial mass is underestimated. We contribute one new member to the previously known z = 4.32 galaxy group. Intrinsic (delensed) positions of the five secure group members span a physical extent of ∼60 kpc. 13 additional candidates selected by spectroscopic/photometric constraints are small and faint, with a mean intrinsic luminosity ∼2.2 mag fainter than L*. NIRCam imaging admits a fairly wide range of brightnesses and morphologies for the group members, suggesting a more diverse galaxy population in this galaxy overdensity.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Strong gravitational lensing - Galaxy clusters - High-redshift galaxy clusters

VizieR on-line data: <Available at CDS (J/ApJ/952/81): table2.dat>

Status at CDS : Examining the need for a new acronym. // All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 296 0

Query : 2023ApJ...952...81F

Basic data :
ACT-CL J0102-4915 -- Cluster of Galaxies
Other object types: otypes_help 		ClG (2014ApJ,ACT,...), gLe (2013ApJ), C?G (2014A&A), X (2019MNRAS,2RXS)
ICRS coord. (ep=J2000) : 		01 02 52.50 -49 14 58.0 (Optical) [ ] E 2010ApJ...723.1523M
FK4 coord. (ep=B1950 eq=1950) : 		01 00 39.49 -49 31 04.4 [ ]
Gal coord. (ep=J2000) : 		297.99465 -67.76902 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 166460 [~] / z(spectroscopic) 0.870 [~] / cz 260819 [~]
   (Opt) D 2013ApJ...772...25S
Angular size (arcmin): 		1.0 1.0 ~ (Rad) D 2015ApJ...813...77Y
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1
: 133 		: 28 Display criteria :

Identifiers (10) :
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ACT-CL J0102.9-4916 NAME El Gordo PSZRX G298.02-67.76 SPT-CL J0102-4915
ACT-CL J0102-4915 PSZ1 G297.94-67.76 PSZSPT J0102-4915
MARD J010256.2-491616 PSZ2 G297.97-67.74 2RXS J010256.2-491616

References (296 between 1850 and 2026) (Total 296)
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