Semantic Scholar Open Access 2023 87 sitasi

Primordial gravitational waves in the nano-Hertz regime and PTA data — towards solving the GW inverse problem

E. Madge Enrico Morgante Cristina Puchades-Ibáñez Nicklas Ramberg Wolfram Ratzinger +2 lainnya

Lihat Sumber DOI

Abstrak

In recent years, several pulsar timing array collaborations have reported first hints for a stochastic gravitational wave background at nano-Hertz frequencies. Here we elaborate on the possibility that this signal comes from new physics that leads to the generation of a primordial stochastic gravitational wave background. We propose a set of simple but concrete models that can serve as benchmarks for gravitational waves sourced by cosmological phase transitions, domain wall networks, cosmic strings, axion dynamics, or large scalar fluctuations. These models are then confronted with pulsar timing data and with cosmological constraints. With only a limited number of free parameters per model, we are able to identify viable regions of parameter space and also make predictions for future astrophysical and laboratory tests that can help with model identification and discrimination.

Topik & Kata Kunci

Physics

Penulis (7)

E. Madge

Enrico Morgante

Cristina Puchades-Ibáñez

Nicklas Ramberg

Wolfram Ratzinger

S. Schenk

P. Schwaller

Format Sitasi

APA MLA BibTeX

Madge, E., Morgante, E., Puchades-Ibáñez, C., Ramberg, N., Ratzinger, W., Schenk, S. et al. (2023). Primordial gravitational waves in the nano-Hertz regime and PTA data — towards solving the GW inverse problem. https://doi.org/10.1007/JHEP10(2023)171

Akses Cepat

Lihat di Sumber doi.org/10.1007/JHEP10(2023)171

Informasi Jurnal

Tahun Terbit: 2023
Bahasa: en
Total Sitasi: 87×
Sumber Database: Semantic Scholar
DOI: 10.1007/JHEP10(2023)171
Akses: Open Access ✓