2023MNRAS.518.5843D

Query : 2023MNRAS.518.5843D

2023MNRAS.518.5843D - Mon. Not. R. Astron. Soc., 518, 5843-5861 (2023/February-1)

Interlopers speak out: studying the dark universe using small-scale lensing anisotropies.

DHANASINGHAM B., CYR-RACINE F.-Y., PETER A.H.G., BENSON A. and GILMAN D.

Abstract (from CDS):

Strongly lensed systems are powerful probes of the distribution of dark matter on small scales. In this paper, we show that line-of-sight haloes between the source and the observers give rise to a distinct anisotropic signature in the two-point function of the effective lensing deflection field. We show in particular that the non-linear coupling between line-of-sight haloes and the main lens plane imprints a characteristic quadrupole moment on this two-point function whose amplitude reflects the abundance of such haloes within the strongly lensed field. We discuss how, by taking ratios of different multipole moments, such observables could be made robust under the mass-sheet transform. We also demonstrate that future extremely large telescopes have the ability to detect the quadrupole moment due to this unique anisotropic signature under ideal conditions. Our approach opens the door to statistically distinguish the effect of line-of-sight haloes from that of the main-lens substructure on lensed images, hence allowing one to probe dark matter physics in a new way.

Journal keyword(s): gravitational lensing: strong - methods: numerical - methods: statistical - dark matter

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	NVSS J193825+664853	Rad	19 38 25.28898	+66 48 52.9152						~	117	2

Query : 2023MNRAS.518.5843D

Basic data :

NVSS J193825+664853 -- Radio Source
Other object types:	`Rad (NVSS,BWE,...)`
ICRS coord. (ep=J2000) :	`19 38 25.28898 +66 48 52.9152 (Radio) [ 55 55 0 ] B 1998MNRAS.300..790W`
FK4 coord. (ep=B1950 eq=1950) :	`19 38 12.94990 +66 41 56.0914 [ 55 55 0 ]`
Gal coord. (ep=J2000) :	`098.65586090 +20.35444411 [ 55 55 0 ]`
Radial velocity / Redshift / cz :	`V(km/s) 241903 [90] / z(~) 2.0590 [0.0003] / cz 617273 [90] D 2011ApJ...730..108R`

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`NVSS J193825+664853`	`CLASS J193825.2886+664852.938`	`IVS B1938+666`	`TXS 1938+666`
`BWE 1938+6641`	`CLASS J193825.2818+664852.909`	`JVAS J1938+668`	`VCS6 J1938+6648`
`6C 193810+664201`	`GB6 B1938+6641`	`JVAS B1938+666`	`WB 1938+6641`
`CLASS B1938+666`	`87GB 193813.3+664151`	`TGSSADR J193825.3+664853`	`WN B1938.2+6641`

References (117 between 1850 and 2026) (Total 117)
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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Data at NED - NASA/IPAC Extragalactic Database : NVSS J193825+664853

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NVSS J193825+664853 BWE 1938+6641 WN B1938.2+6641

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