Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 488, Issue 4, Pages 4497-4503Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz1978
Keywords
dark matter; large-scale structure of Universe; cosmology: theory
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Funding
- Israel Science Foundation [1829/12, 936/18]
- I-CORE Program of the Planning and Budgeting Committee
- Asher Space Research Institute
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If the dark matter is made of ultralight axions, stable solitonic cores form at the centres of virialized haloes. In some range for the mass m of the axion particle, these cores are sufficiently compact and can mimic supermassive black holes (SMBH) residing at galactic nuclei. We use the solitonic core-halo mass relation, validated in numerical simulations, to constrain a new range of allowed axion mass from measurements of the SMBH mass in (pseudo)bulge and bulgeless galaxies. These limits are based on observations of galactic nuclei on scales smaller than 10pc. Our analysis suggests that is ruled out by the data. We briefly discuss whether an attractive self-interaction among axions could alleviate this constraint.
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