2025ApJ...992L..22S

Query : 2025ApJ...992L..22S

2025ApJ...992L..22S - Astrophys. J., 992, L22 (2025/October-3)

Precision Measurement of Large Shear Signals.

SUN J., ZHANG J., CUI L., SONNENFELD A. and WANG X.

Abstract (from CDS):

So far, estimators of galaxy shape distortions are only carefully studied perturbatively in the case of small shear signals, mainly for weak-lensing science. However, in the neighborhood of massive foreground clusters, a large number of background galaxies can be significantly distorted. The measurement of such large shear signals could be quite nontrivial under general observing conditions, i.e., in the presence of point-spread function and noise. In this work, we propose a nonperturbative method to exactly recover large shear signals (≳0.5) under general conditions. We test the method on simulated galaxy images and find that it is accurate down to the very faint end. This new method is particularly useful for more accurate recovery of the shear distribution in the neighborhood of massive foreground clusters, thereby improving the modeling of the underlying dark matter halo properties.

Journal keyword(s): Gravitational lensing shear - Weak gravitational lensing - Galaxy clusters - Dark matter - Strong gravitational lensing

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	ACO 2744	ClG	00 14 20.03	-30 23 17.8						~	1077	0

Query : 2025ApJ...992L..22S

Basic data :

ACO 2744 -- Cluster of Galaxies
Other object types:	`ClG (2004A&A,ACO,...)`, `gLe (2001ApJ)`, `C?G (2014A&A,XCLASS)`, `X (2020ApJ,RBS,...)`, `G (AM)`
ICRS coord. (ep=J2000) :	`00 14 20.03 -30 23 17.8 [ ] E 2002MNRAS.329...87D`
FK4 coord. (ep=B1950 eq=1950) :	`00 11 48.51 -30 39 58.6 [ ]`
Gal coord. (ep=J2000) :	`008.89623 -81.24283 [ ]`
Radial velocity / Redshift / cz :	`V(km/s) 78187 [~] / z(spectroscopic) 0.306 [~] / cz 91736 [~] (Opt) D 2019ApJS..240...39G`
Angular size (arcmin):	`7.0 7.0 ~ (Rad) D` `2015ApJ...813...77Y`

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`ACO 2744`	`MCS J0014.3-3022`	`PSZRX G008.92-81.24`	`SPT-CL J0014-3022`
`ACCG 118`	`MCXC J0014.3-3023`	`RBS 34`	`XCLASS 20073`
`ACT-CL J0014.3-3022`	`PLCKESZ G008.93-81.23`	`RXC J0014.3-3022`	`[DBG99] 5`
`AM 0011-303`	`PSZ1 G009.02-81.22`	`RXC J0014.3-3023`
`BAX 003.5813-30.3887`	`PSZ2 G008.94-81.22`	`1RXS J001419.1-302216`

References (1077 between 1850 and 2026) (Total 1077)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : ACO 2744

Link by name to the catalogue in VizieR :

ACO 2744 RXC J0014.3-3022 RXC J0014.3-3023 1RXS J001419.1-302216

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