纳米重力探测是宇宙膨胀过程中共振粒子产生的证据吗？

IF 10.5 4区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of High Energy Astrophysics Pub Date : 2025-02-20 DOI:10.1016/j.jheap.2025.100358

M.R. Gangopadhyay , V.V. Godithi , R. Inui , K. Ichiki , T. Kajino , A. Manusankar , G.J. Mathews , Yogesh

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引用次数: 0

摘要

我们表明，最近由nanogravity 15年合作报告的宇宙引力波背景可能是膨胀期间共振粒子产生的结果。对于适当的振幅和粒子质量，原始标量功率谱的增强可以产生二次诱导引力波（SIGW），其出现的尺度与纳米重力探测的频率相对应。由于共振产生的效果与nanogrv 15年合作研究的δ函数增量相当，我们的研究表明，低频脉冲星定时阵列（PTA）数据可以通过探测引力波（GW）的宇宙背景来揭示暴胀期间的物理方面。

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Is the NANOGrav detection evidence of resonant particle creation during inflation?

We show that the recently reported cosmic gravitational wave background by the NANOGrav 15-year collaboration may be the result of resonant particle creation during inflation. For the appropriate amplitude and particle mass, an enhancement of the primordial scalar power spectrum could induce Secondary Induced Gravitational Waves (SIGW), which will appear on a scale corresponding to the frequency of the NANOGrav detection. Since the resonant creation will have an effect comparable to that of a delta function increment as studied by the NANOGrav 15-year collaboration, our study indicates that the low-frequency Pulsar Timing Array (PTA) data could reveal the aspects of the physics during inflation through the detection of a cosmic background of Gravitational Waves (GW).

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来源期刊

Journal of High Energy Astrophysics Earth and Planetary Sciences-Space and Planetary Science

CiteScore

9.70

自引率

5.30%

发文量

审稿时长

65 days

期刊介绍： The journal welcomes manuscripts on theoretical models, simulations, and observations of highly energetic astrophysical objects both in our Galaxy and beyond. Among those, black holes at all scales, neutron stars, pulsars and their nebula, binaries, novae and supernovae, their remnants, active galaxies, and clusters are just a few examples. The journal will consider research across the whole electromagnetic spectrum, as well as research using various messengers, such as gravitational waves or neutrinos. Effects of high-energy phenomena on cosmology and star-formation, results from dedicated surveys expanding the knowledge of extreme environments, and astrophysical implications of dark matter are also welcomed topics.