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Constraint on reheating after f(R) inflation from gravitational waves

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arxiv 1401.1023 v1 pith:MNRHJAI5 submitted 2014-01-06 astro-ph.CO gr-qc

Atsushi Nishizawa , Hayato Motohashi This is my paper
classification astro-ph.COgr-qc
keywords modelinflationreheatingaccelerationbeengravitationalinterestingspectrum
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Recently, a combined model of the primordial inflation and the present cosmic acceleration has been proposed in the context of f(R) gravity. This model is composed of the late-time acceleration term and an R2 term, which enables the model to avoid high curvature singularity and describe a quasi-de Sitter inflationary phase in the early Universe. An interesting feature of this model is that the reheating dynamics after the inflation is significantly modified, in contrast to the original R2 model, and affects the shape of a gravitational wave background (GWB) spectrum. Here we investigate the production of a GWB during the inflation and reheating eras in the R2-corrected f(R) model and compute a GWB spectrum. We found that interesting region of the model parameters has already been excluded by the cosmological limit on abundance of GWs.

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Cited by 3 Pith papers

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  1. Hawking area law in quantum gravity

    gr-qc 2026-04 unverdicted novelty 5.0 of 10

    Exact Hawking area law from black hole mergers restricts quantum gravity to singular Ricci-flat or specific regular black holes in Stelle and nonlocal theories, derives the standard entropy-area law, and realizes Barr...

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    gr-qc 2026-04 conditional novelty 5.0 of 10

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  3. Close Hyperbolic Encounters In f(R) Gravity

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    In f(R) gravity, close hyperbolic black-hole encounters emit a scalar gravitational-wave mode whose promised detectability is not supported by the paper's own amplitude formulas.

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