Investigating cosmic histories with a stiff era through Gravitational Waves
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912070809681920 |
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| author | Duval, Hannah Kuroyanagi, Sachiko Mariotti, Alberto Romero-Rodríguez, Alba Sakellariadou, Mairi |
| author_facet | Duval, Hannah Kuroyanagi, Sachiko Mariotti, Alberto Romero-Rodríguez, Alba Sakellariadou, Mairi |
| contents | We investigate the potential of gravitational-wave background searches to constrain cosmic histories characterised by a stiff equation of state, preceded by a period of matter domination. Such a scenario leads to a characteristic peak in the primordial gravitational-wave spectrum originating from cosmological inflation. Assuming instant transitions between distinct epochs, which allows an analytical treatment of the gravitational-wave spectrum, we perform a Bayesian inference analysis to derive constraints from the first three observing runs of the LIGO-Virgo-KAGRA Collaboration. Additionally, we consider a smooth transition, employing an axion-like particle physics model, and highlight the difference with the instant transition approximation. We then forecast detection prospects for such a cosmic history through future gravitational-wave experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_10201 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Investigating cosmic histories with a stiff era through Gravitational Waves Duval, Hannah Kuroyanagi, Sachiko Mariotti, Alberto Romero-Rodríguez, Alba Sakellariadou, Mairi General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology We investigate the potential of gravitational-wave background searches to constrain cosmic histories characterised by a stiff equation of state, preceded by a period of matter domination. Such a scenario leads to a characteristic peak in the primordial gravitational-wave spectrum originating from cosmological inflation. Assuming instant transitions between distinct epochs, which allows an analytical treatment of the gravitational-wave spectrum, we perform a Bayesian inference analysis to derive constraints from the first three observing runs of the LIGO-Virgo-KAGRA Collaboration. Additionally, we consider a smooth transition, employing an axion-like particle physics model, and highlight the difference with the instant transition approximation. We then forecast detection prospects for such a cosmic history through future gravitational-wave experiments. |
| title | Investigating cosmic histories with a stiff era through Gravitational Waves |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2405.10201 |