Ultralight Boson Dark Matter and Event Horizon Telescope Observations of M87^{*}

Physical Review Letters
Hooman Davoudiasl, Peter B Denton

Abstract

The initial data from the Event Horizon Telescope (EHT) on M87^{*}, the supermassive black hole at the center of the M87 Galaxy, provide direct observational information on its mass, spin, and accretion disk properties. A combination of the EHT data and other constraints provides evidence that M87^{*} has a mass ∼6.5×10^{9}  M_{⊙}. EHT also inferred the dimensionless spin parameter |a^{*}|≳0.5 from jet properties; a separate recent analysis using only the light from near M87^{*} as measured by the EHT Collaboration found |a^{*}|=0.9±0.1. These determinations disfavor ultralight bosons of mass μ_{b}∈(0.85,4.6)×10^{-21}  eV for spin-one bosons and μ_{b}∈(2.9,4.6)×10^{-21}  eV for spin-zero bosons, within the range considered for fuzzy dark matter, invoked to explain dark matter distribution on approximately kiloparsec scales. Future observations of M87^{*} could be expected to strengthen our conclusions.

References

Sep 16, 2000·Physical Review Letters·W HuA Gruzinov
Feb 27, 2016·Physical Review Letters·B P AbbottUNKNOWN LIGO Scientific Collaboration and Virgo Collaboration
Apr 22, 2017·Physical Review Letters·Hooman Davoudiasl, Christopher W Murphy
Aug 5, 2017·Physical Review Letters·Vid IršičGeorge D Becker

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Citations

Feb 29, 2020·Physical Review Letters·Yifan ChenYue Zhao
Sep 26, 2020·Physical Review Letters·James H H ChanTom Broadhurst
Jun 13, 2020·Physical Review Letters·Richard BritoPaolo Pani
Jan 5, 2021·Journal of High Energy Physics : JHEP·Yuichiro NakaiZiwei Wang

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