Given the recent advances in gravitational-wave detection technologies, the detection and characterization of gravitational-wave backgrounds (GWBs) with the Laser Interferometer Space Antenna (LISA) is a real possibility. To assess the abilities of the LISA satellite network to reconstruct anisotropies of different angular scales and in different directions on the sky, we develop a map-maker based on an optimal quadratic estimator. The resulting maps are maximum likelihood representations of the GWB intensity on the sky integrated over a broad range of frequencies. We test the algorithm by reconstructing known input maps with different input distributions and over different frequency ranges. We find that, in an optimal scenario of well understood noise and high frequency, high SNR signals, the maximum scales LISA may probe are ℓmax≲15. The map-maker also allows to test the directional dependence of LISA noise, providing insight on the directional sky sensitivity we may expect.

Contaldi, C., Pieroni, M., Renzini, A., Cusin, G., Karnesis, N., Peloso, M., et al. (2020). Maximum likelihood map making with the Laser Interferometer Space Antenna. PHYSICAL REVIEW D, 102(4) [10.1103/PhysRevD.102.043502].

Maximum likelihood map making with the Laser Interferometer Space Antenna

Renzini A. I.
;
2020

Abstract

Given the recent advances in gravitational-wave detection technologies, the detection and characterization of gravitational-wave backgrounds (GWBs) with the Laser Interferometer Space Antenna (LISA) is a real possibility. To assess the abilities of the LISA satellite network to reconstruct anisotropies of different angular scales and in different directions on the sky, we develop a map-maker based on an optimal quadratic estimator. The resulting maps are maximum likelihood representations of the GWB intensity on the sky integrated over a broad range of frequencies. We test the algorithm by reconstructing known input maps with different input distributions and over different frequency ranges. We find that, in an optimal scenario of well understood noise and high frequency, high SNR signals, the maximum scales LISA may probe are ℓmax≲15. The map-maker also allows to test the directional dependence of LISA noise, providing insight on the directional sky sensitivity we may expect.
Articolo in rivista - Articolo scientifico
gravitational-wave
English
2020
102
4
043502
open
Contaldi, C., Pieroni, M., Renzini, A., Cusin, G., Karnesis, N., Peloso, M., et al. (2020). Maximum likelihood map making with the Laser Interferometer Space Antenna. PHYSICAL REVIEW D, 102(4) [10.1103/PhysRevD.102.043502].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/459648
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