Microlensing and dynamical constraints on primordial black hole dark matter with an extended mass function

Green, Anne M.

Abstract

The recent discovery of gravitational waves from mergers of ?10 M? black hole binaries has stimulated interested in primordial black hole (PBH) dark matter in this mass range. Microlensing and dynamical constraints exclude all of the dark matter in compact objects with a delta function mass function in the range 10?7 ? M=M? ? 105. However it has been argued that all of the dark matter could be composed of compact objects in this range with an extended mass function. We explicitly recalculate the microlensing and dynamical constraints for compact objects with an extended mass function which replicates the PBH mass function produced by inflation models. We find that the microlensing and dynamical constraints place conflicting constraints on the width of the mass function, and do not find a mass function which satisfies both constraints.

• Journal Article Type: Article
• Acceptance Date: Sep 14, 2016
• Online Publication Date: Sep 28, 2016
• Deposit Date: Oct 3, 2016
• Publicly Available Date: Oct 3, 2016
• Journal: Physical Review D
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 94
• Article Number: 063530
• DOI: https://doi.org/10.1103/PhysRevD.94.063530
• Public URL: https://nottingham-repository.worktribe.com/output/809029
• Publisher URL: http://journals.aps.org/prd/abstract/10.1103/PhysRevD.94.063530