2026ApJ...997..103H

Query : 2026ApJ...997..103H

2026ApJ...997..103H - Astrophys. J., 997, 103 (2026/January-3)

The Distribution of Quenched Galaxies in the Massive z = 0.87 Galaxy Cluster El Gordo.

HONOR R., COHEN S.H., CARLETON T., WILLNER S.P., POLLETTA M.D.C., WINDHORST R.A., COE D., CONSELICE C.J., DIEGO J.M., DRIVER S.P., D'SILVA J.C.J., FOO N., FRYE B.L., GROGIN N.A., HATHI N.P., JANSEN R.A., KAMIENESKI P.S., KOEKEMOER A.M., LEIMBACH R., MARSHALL M.A., ORTIZ III R., PIRZKAL N., RICOTTI M., ROBOTHAM A.S.G., RUTKOWSKI M.J., RYAN R.E.Jr, SAIKIA P., SUMMERS J., WILLMER C.N.A. and YAN H.

Abstract (from CDS):

El Gordo (ACT-CL J0102-4915) is a massive galaxy cluster with two major mass components at redshift z = 0.87. Using spectral energy distribution fitting results from JWST/NIRCam photometry, the fraction of quenched galaxies in this cluster was measured in two bins of stellar mass: $9\lt {\mathrm{log}}({M}_{* }/{M}_{\odot })\lt 10$ and $10\leqslant \,{\mathrm{log}}({M}_{* }/{M}_{\odot })\lt 12$ . While there is no correlation between the quenched fraction and angular separation from the cluster's overall center of mass, there is a correlation between the quenched fraction and angular separation from the center of the nearest of the two mass components for the less-massive galaxies. This suggests that environmental quenching processes are in place at z ∼ 1, and that dwarf galaxies are more affected by those processes than massive galaxies.

Journal keyword(s): Galaxy quenching - Galaxy clusters - Galaxy evolution - Star formation - Galaxies

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

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 : 2026ApJ...997..103H

Basic data :

ACT-CL J0102-4915 -- Cluster of Galaxies
Other object types:	`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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`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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