Journal article
The emergence and ionizing feedback of Pop III.1 stars as progenitors for supermassive black holes
- Abstract:
- Recent observations by James Webb Space Telescope reveal an unexpectedly abundant population of rapidly growing supermassive black holes (SMBHs) in the early Universe, underscoring the need for improved models for their origin and growth. Employing new full radiative transfer hydrodynamical simulations of galaxy formation, we investigate the local and intergalactic feedback of SMBH progenitors for the Population III.1 (Pop III.1) scenario, i.e. efficient formation of supermassive stars from pristine, undisturbed dark matter minihaloes. Our cosmological simulations capture the R-type expansion phase of these Pop III.1 stars, with their H-ionizing photon luminosities of generating H ii regions that extend deep into the intergalactic medium, reaching comoving radii of . We vary both the Pop III.1 ionization flux and cosmological formation environments, finding the former regulates their final , whereas the latter is more important in setting their formation redshift. We use the results from our radiation-hydrodynamics simulations to estimate the cosmic number density of SMBHs, , expected from Pop III.1 progenitors. We find , consistent with the results inferred from recent observations of the local and high-redshift universe. Overall, this establishes Pop III.1 progenitors as viable candidates for the formation of the first SMBH, and emphasizes the importance of exploring heavy mass seed scenarios.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.7MB, Terms of use)
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- Publisher copy:
- 10.1093/mnras/staf1313
Authors
+ National Aeronautics and Space Administration
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- Funder identifier:
- https://ror.org/027ka1x80
+ Space Telescope Science Institute
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- Funder identifier:
- https://ror.org/036f5mx38
+ Engineering and Physical Sciences Research Council
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- Funder identifier:
- https://ror.org/0439y7842
+ Department for Business, Energy and Industrial Strategy
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- Funder identifier:
- https://ror.org/019ya6433
+ Science and Technology Facilities Council
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- Funder identifier:
- https://ror.org/057g20z61
- Publisher:
- Oxford University Press
- Journal:
- Monthly Notices of the Royal Astronomical Society More from this journal
- Volume:
- 542
- Issue:
- 2
- Pages:
- 1532-1543
- Publication date:
- 2025-08-12
- Acceptance date:
- 2025-07-31
- DOI:
- EISSN:
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1365-2966
- ISSN:
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0035-8711
- Language:
-
English
- Keywords:
- Source identifiers:
-
3236902
- Deposit date:
-
2025-08-28
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