Constraining primordial black holes as a fraction of dark matter through accretion disk luminosity

DAgostino R. Giambò R. Luongo O.
15 February 2023 American Physical Society

Physical Review D
2023 #107 Issue 4

In this paper, we consider the hypothesis that fractions of dark matter could be constituted by primordial black holes (PBHs). To test this possibility, we work out the observational properties of a static black hole embedded in the dark matter envelope made of a PBH source. The corresponding modifications of geometry due to such a physical system are investigated, with a particular focus on the accretion disk luminosity in spiral galaxies. The impact of the PBH presence is analyzed through modification of the disk luminosity and kinematic quantities. Thus, we discuss possible constraints on the PBH abundance in view of the most recent theoretical bounds. The results of our study indicate that suitable PBH masses are MPBHϵ[106,1012] M⊙ for PBH fractions fPBHϵ[10-3,1]. In particular, a comparison with the predictions of the exponential sphere density profile for dark matter suggests that the best-matching configuration is achieved for fPBH=1 and MPBH=106 M⊙. Consequences with respect to the current knowledge on primordial black hole physics are discussed.

Text of the article Перейти на текст статьи

Scuola Superiore Meridionale, Largo S. Marcellino 10, Napoli, 80138, Italy
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli, Via Cinthia 9, Napoli, 80126, Italy
School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, Camerino, 62032, Italy
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia, Via Alessandro Pascoli 23c, Perugia, 06123, Italy
Dipartimento di Matematica, Università di Pisa, Largo B. Pontecorvo, Pisa, 56127, Italy
Università di Camerino, Divisione di Fisica, Via Madonna delle carceri, Camerino, 62032, Italy
NNLOT, Al-Farabi Kazakh National University, Al-Farabi Avenue 71, Almaty, 050040, Kazakhstan

Scuola Superiore Meridionale
Istituto Nazionale di Fisica Nucleare (INFN)
School of Science and Technology
Istituto Nazionale di Fisica Nucleare (INFN)
Dipartimento di Matematica
Università di Camerino
NNLOT

10 лет помогаем публиковать статьи Международный издатель

Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026