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Dwarf galaxies and the black hole scaling relations
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King, Andrew and Nealon, Rebecca (2021) Dwarf galaxies and the black hole scaling relations. Monthly Notices of the Royal Astronomical Society: Letters, 502 (1). L1-L5. doi:10.1093/mnrasl/slaa200 ISSN 1745-3925.
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WRAP-dwarf-galaxies-black-hole-scaling-relations-Nealon-2021.pdf - Accepted Version - Requires a PDF viewer. Download (1008Kb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnrasl/slaa200
Abstract
The sample of dwarf galaxies with measured central black hole masses M and velocity dispersions σ has recently doubled, and gives a close fit to the extrapolation of the M - σ relation for more massive galaxies. We argue that this is difficult to reconcile with suggestions that the scaling relations between galaxies and their central black holes are simply a statistical consequence of assembly through repeated mergers. This predicts black hole masses significantly larger than those observed in dwarf galaxies unless the initial distribution of uncorrelated seed black hole and stellar masses is confined to much smaller masses than earlier assumed. It also predicts a noticeable flattening of the M - σ relation for dwarfs, to M ∝ σ2 compared with the observed M ∝ σ4. In contrast black hole feedback predicts that black hole masses tend towards a universal M ∝ σ4 relation in all galaxies, and correctly gives the properties of powerful outflows recently observed in dwarf galaxies. These considerations emphasize once again that the fundamental physical black hole – galaxy scaling relation is between M and σ. The relation of M to the bulge mass Mb is acausal, and depends on the quite independent connection between Mb and σ set by stellar feedback.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Dwarf galaxies, Quasars , Black holes (Astronomy) | ||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society: Letters | ||||||||||||
Publisher: | Wiley | ||||||||||||
ISSN: | 1745-3925 | ||||||||||||
Official Date: | March 2021 | ||||||||||||
Dates: |
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Volume: | 502 | ||||||||||||
Number: | 1 | ||||||||||||
Page Range: | L1-L5 | ||||||||||||
DOI: | 10.1093/mnrasl/slaa200 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Reuse Statement (publisher, data, author rights): | This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters following peer review. The version of record Andrew King, Rebecca Nealon, Dwarf galaxies and the black hole scaling relations, Monthly Notices of the Royal Astronomical Society: Letters, Volume 502, Issue 1, March 2021, Pages L1–L5, is available online at: https://doi.org/10.1093/mnrasl/slaa200 | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Date of first compliant deposit: | 23 March 2021 | ||||||||||||
Date of first compliant Open Access: | 23 March 2021 | ||||||||||||
RIOXX Funder/Project Grant: |
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