No Cover Image

Journal article 751 views 36 downloads

Probing anisotropies of the Stochastic Gravitational Wave Background with LISA

Nicola Bartolo, Daniele Bertacca, Robert Caldwell, Carlo R. Contaldi, Giulia Cusin, Valerio De Luca, Emanuela Dimastrogiovanni, Matteo Fasiello, Daniel G. Figueroa, Gabriele Franciolini, Alexander C. Jenkins, Marco Peloso, Mauro Pieroni, Arianna Renzini, Angelo Ricciardone, Antonio Riotto, Mairi Sakellariadou, Lorenzo Sorbo, Gianmassimo Tasinato Orcid Logo, Jesús Torrado, Sebastien Clesse, Sachiko Kuroyanagi

Journal of Cosmology and Astroparticle Physics, Volume: 2022, Issue: 11, Start page: 009

Swansea University Author: Gianmassimo Tasinato Orcid Logo

Check full text

DOI (Published version): 10.1088/1475-7516/2022/11/009

Abstract

We investigate the sensitivity of the Laser Interferometer Space Antenna (LISA) to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). We first discuss the main astrophysical and cosmological sources of SGWB which are characterized by anisotropies in the GW energy density, and w...

Full description

Published in: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
Published: IOP Publishing 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa62014
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: We investigate the sensitivity of the Laser Interferometer Space Antenna (LISA) to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). We first discuss the main astrophysical and cosmological sources of SGWB which are characterized by anisotropies in the GW energy density, and we build a Signal-to-Noise estimator to quantify the sensitivity of LISA to different multipoles. We then perform a Fisher matrix analysis of the prospects of detectability of anisotropic features with LISA for individual multipoles, focusing on a SGWB with a power-law frequency profile. We compute the noise angular spectrum taking into account the specific scan strategy of the LISA detector. We analyze the case of the kinematic dipole and quadrupole generated by Doppler boosting an isotropic SGWB. We find that β ΩGW ∼ 2 × 10-11 is required to observe a dipolar signal with LISA. The detector response to the quadrupole has a factor ∼ 103 β relative to that of the dipole. The characterization of the anisotropies, both from a theoretical perspective and from a map-making point of view, allows us to extract information that can be used to understand the origin of the SGWB, and to discriminate among distinct superimposed SGWB sources.
College: Faculty of Science and Engineering
Issue: 11
Start Page: 009

Similar Items