Non-Gaussianity from the cross-correlation of the astrophysical Gravitational Wave Background and the Cosmic Microwave Background

被引：1
作者：
Perna, Gabriele [1 ,2 ]
Ricciardone, Angelo [1 ,2 ,3 ]
Bertacca, Daniele [1 ,2 ,4 ]
Matarrese, Sabino [1 ,2 ,4 ,5 ]
机构：
[1] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Via Marzolo 8, I-35131 Padua, Italy
[2] INFN, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy
[3] Univ Pisa, Dipartimento Fis Enrico Fermi, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
[4] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
[5] Gran Sasso Sci Inst, Viale F Crispi 7, I-67100 Laquila, Italy
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2023年 / 10期
关键词：
gravitational waves and CMBR polarization; non-gaussianity; COSMOLOGICAL POPULATION; ANISOTROPIES;
D O I：
10.1088/1475-7516/2023/10/014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Since the first LIGO/Virgo detection, Gravitational Waves (GWs) have been very promising as a new complementary probe to understand our Universe. One of the next challenges of GW search is the detection and characterization of the Stochastic Gravitational Wave Background (SGWB), that is expected to open a window on the very early Universe (cosmological background) and to provide us new information on astrophysical source populations (astrophysical background). One way to characterize the SGWB and to extract information about its origin is through the cross-correlation with other cosmological probes. To this aim, in this paper, we explore the cross-correlation between the astrophysical background anisotropies and the Cosmic Microwave Background (CMB) ones. Such a signal is sensitive to primordial non-Gaussianity (nG) through the GW bias. Thus, we study the capability of next generation space-based interferometers to detect such a cross-correlation signal and to constrain primordial nG.
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页数：22
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