Forecasting the sensitivity of pulsar timing arrays to gravitational wave backgrounds

被引：0
作者：
Babak, Stanislav [1 ]
Falxa, Mikel [1 ,2 ]
Franciolini, Gabriele [3 ]
Pieroni, Mauro [3 ]
机构：
[1] Astroparticule et Cosmologie, CNRS, Université Paris Cité, Paris
[2] LPC2E, CNRS, 3 Av. de la Recherche Scientifique, Orléans
[3] CERN, Theoretical Physics Department, Esplanade des Particules 1, Geneva
来源：
Physical Review B | 2024年 / 110卷 / 12期
关键词：
Black holes - Cosmology - Gravitational effects;
D O I：
10.1103/PhysRevB.110.125125
中图分类号：
学科分类号：
摘要：
Pulsar timing array (PTA) observations hinted towards the existence of a stochastic gravitational wave background (SGWB) in the nHz frequency band. Still, the nature of the SGWB signal cannot be confidently inferred from current data, and the leading explanation invokes mergers of supermassive black holes. If confirmed, such discovery would not only represent a turning point in our understanding of astrophysics, but it may severely limit the capability of searching for additional cosmological sources in the nHz frequency range. In this work, we build a simple framework to forecast the sensitivity of future pulsar timing array configurations and assess the parameter estimation of SGWB, which could consist of several contributions. We release the python code fastpta, implementing this framework and ready to use. © 2024 authors. Published by the American Physical Society.
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