2021/05/31 by Lina Wu, Li‐Na Wu, Yungui Gong +1
Physics and Astronomy · #Astrophysics #Binary black hole #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark matter #Gravitational wave #Gravitational wave background #Inflation (cosmology) #Inflaton #Mathematical physics #Observatory #Particle physics #Physics #Primordial black hole #Pulsars and Gravitational Waves Research #Quantum mechanics #Scalar (mathematics) #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.104.123544
published as Phys. Rev. D 104 (2021), 123544 · 28 pages, 5 figures, references added, typos corrected, published version
arxiv created 2021/12/08 · openalex publication_date 2021/12/22 · arxiv updated 2021/12/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The formation of primordial black hole (PBH) dark matter and the generation of scalar induced secondary gravitational waves (SIGWs) have been studied in the generic no-scale supergravity inflationary models. By adding an exponential term to the K"ahler potential, the inflaton experiences a period of ultraslow-roll and the amplitude of primordial power spectrum at small scales is enhanced to O(10^\ensuremath-2). The enhanced power spectra of primordial curvature perturbations can have both sharp and broad peaks. A wide mass range of PBHs can be produced in our model, and the frequencies of the accompanied SIGWs are ranged form nanohertz to kilohertz. We show four benchmark points where the generated PBH masses are around O(10^\ensuremath-16 M_\ensuremath\bigodot), O(10^\ensuremath-12 M_\ensuremath\bigodot), O(10^\ensuremath-2 M_\ensuremath\bigodot) and O(102 M_\ensuremath\bigodot). The PBHs with masses around O(10^\ensuremath-16 M_\ensuremath\bigodot) and O(10^\ensuremath-12 M_\ensuremath\bigodot) can make up almost all the dark matter, and the accompanied SIGWs can be probed by the upcoming space-based gravitational wave observatory. Also, the SIGWs accompanied with the formation of stellar mass PBHs can be used to interpret the stochastic GW background in the nanohertz band, detected by the North American Nanohertz Observatory for Gravitational Waves, and can be tested by future interferometric gravitational wave observatory.