Structure of the Baryon Halo Around a Supermassive Primordial Black Hole
According to some theoretical models, primordial black holes with masses of more than 10<sup>8</sup> solar masses could be born in the early universe, and their possible observational manifestations have been investigated in a number of works. Dense dark matter and baryon halos could for...
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MDPI AG
2024-11-01
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| author | Boris Murygin Viktor Stasenko Yury Eroshenko |
| author_facet | Boris Murygin Viktor Stasenko Yury Eroshenko |
| author_sort | Boris Murygin |
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| description | According to some theoretical models, primordial black holes with masses of more than 10<sup>8</sup> solar masses could be born in the early universe, and their possible observational manifestations have been investigated in a number of works. Dense dark matter and baryon halos could form around such primordial black holes even at the pre-galactic stage (in the cosmological Dark Ages epoch). In this paper, the distribution and physical state of the gas in the halo are calculated, taking into account the radiation transfer from the central accreting primordial black hole. This made it possible to find the ionization radius, outside of which there are regions of neutral hydrogen absorption in the 21 cm line. The detection of annular absorption regions at high redshifts in combination with a central bright source may provide evidence of the existence of supermassive primordial black holes. We also point out the fundamental possibility of observing absorption rings with strong gravitational lensing on galaxy clusters, which weakens the requirements for the angular resolution of radio telescopes. |
| format | Article |
| id | doaj-art-fea291a79ebe416ca30a03419e6b649f |
| institution | Kabale University |
| issn | 2571-712X |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Particles |
| spelling | doaj-art-fea291a79ebe416ca30a03419e6b649f2024-12-27T14:45:08ZengMDPI AGParticles2571-712X2024-11-01741004101610.3390/particles7040061Structure of the Baryon Halo Around a Supermassive Primordial Black HoleBoris Murygin0Viktor Stasenko1Yury Eroshenko2Institute for Nuclear Research of the Russian Academy of Sciences, Moscow 117312, RussiaInstitute for Nuclear Research of the Russian Academy of Sciences, Moscow 117312, RussiaInstitute for Nuclear Research of the Russian Academy of Sciences, Moscow 117312, RussiaAccording to some theoretical models, primordial black holes with masses of more than 10<sup>8</sup> solar masses could be born in the early universe, and their possible observational manifestations have been investigated in a number of works. Dense dark matter and baryon halos could form around such primordial black holes even at the pre-galactic stage (in the cosmological Dark Ages epoch). In this paper, the distribution and physical state of the gas in the halo are calculated, taking into account the radiation transfer from the central accreting primordial black hole. This made it possible to find the ionization radius, outside of which there are regions of neutral hydrogen absorption in the 21 cm line. The detection of annular absorption regions at high redshifts in combination with a central bright source may provide evidence of the existence of supermassive primordial black holes. We also point out the fundamental possibility of observing absorption rings with strong gravitational lensing on galaxy clusters, which weakens the requirements for the angular resolution of radio telescopes.https://www.mdpi.com/2571-712X/7/4/61dark agesaccretionprimordial black holes21-cm cosmologydark matter |
| spellingShingle | Boris Murygin Viktor Stasenko Yury Eroshenko Structure of the Baryon Halo Around a Supermassive Primordial Black Hole Particles dark ages accretion primordial black holes 21-cm cosmology dark matter |
| title | Structure of the Baryon Halo Around a Supermassive Primordial Black Hole |
| title_full | Structure of the Baryon Halo Around a Supermassive Primordial Black Hole |
| title_fullStr | Structure of the Baryon Halo Around a Supermassive Primordial Black Hole |
| title_full_unstemmed | Structure of the Baryon Halo Around a Supermassive Primordial Black Hole |
| title_short | Structure of the Baryon Halo Around a Supermassive Primordial Black Hole |
| title_sort | structure of the baryon halo around a supermassive primordial black hole |
| topic | dark ages accretion primordial black holes 21-cm cosmology dark matter |
| url | https://www.mdpi.com/2571-712X/7/4/61 |
| work_keys_str_mv | AT borismurygin structureofthebaryonhaloaroundasupermassiveprimordialblackhole AT viktorstasenko structureofthebaryonhaloaroundasupermassiveprimordialblackhole AT yuryeroshenko structureofthebaryonhaloaroundasupermassiveprimordialblackhole |