2025ApJ...988..272Z

Query : 2025ApJ...988..272Z

2025ApJ...988..272Z - Astrophys. J., 988, 272 (2025/August-1)

The Proper Motion of Strongly Lensed Binary Neutron Star Mergers in LIGO/Virgo/Kagra Can Be Constrained by Measuring Doppler-induced Gravitational-wave Dephasing.

ZWICK L. and SAMSING J.

Abstract (from CDS):

Strongly lensed binary neutron star (NS-NS) mergers are expected to be observed once LIGO/Virgo/Kagra reaches the planned A+ or proposed A# sensitivity. We demonstrate that the relative transverse velocity of the source-lens system can be constrained by comparing the phase of the two associated gravitational wave (GW) images, using both semianalytical and numerical Bayesian methods. For A+ sensitivity, a 1σ NS-NS merger signal in magnification (μ = 200) and redshift (zS = 1) will carry a marginally detectable dephasing signature for a source transverse velocity of ∼1800 km s–1. This is comparable to the velocity dispersion of large galaxy clusters. Assuming the same population distribution, the most likely source parameters of μ = 100 and zS = 1.4 are always expected to showcase detectable dephasing imprints for A# sensitivity, provided they are moving with transverse velocities larger than ∼ 2000 km s–1. We conclude that a first measurement of the relative transverse velocity of a source via GW dephasing methods is likely only a few years away.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gravitational wave astronomy - Gravitational waves - Neutron stars - Gravitational lensing - 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 S 1077 ClG 22 58 52.34 -34 46 54.6           ~ 198 0

Query : 2025ApJ...988..272Z

Basic data :
ACO S 1077 -- Cluster of Galaxies
Other object types: otypes_help 		ClG (2019A&A,ACO,...), C?G (2014A&A), gLe (2001ApJ)
ICRS coord. (ep=J2000) : 		22 58 52.34 -34 46 54.6 [ ] E 2002MNRAS.329...87D
FK4 coord. (ep=B1950 eq=1950) : 		22 56 06.00 -35 03 00.0 [ ]
Gal coord. (ep=J2000) : 		008.31974 -64.78026 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 79466 [~] / z(~) 0.312000 [~] / cz 93535.25 [~]
   D 1989ApJS...70....1A
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Hierarchy : number of linked objects
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: 311 		Display criteria :

Identifiers (6) :
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ACO S 1077 BAX 344.7181-34.7818 PSZ2 G008.31-64.74
ACCG 114 PSZ1 G008.33-64.74 PSZRX G008.33-64.76

References (198 between 1850 and 2026) (Total 198)
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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Velocities : 3   

   

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Herschel : 3   

   

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Data at NED - NASA/IPAC Extragalactic Database : ACO S 1077

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ACO S 1077

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