scholarly journals Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates

2008 ◽  
Vol 680 (2) ◽  
pp. 829-845 ◽  
Author(s):  
Massimo Ricotti ◽  
Jeremiah P. Ostriker ◽  
Katherine J. Mack
Keyword(s):  
Black Holes ◽  
Cosmic Microwave Background ◽  
Cosmological Parameter ◽  
Parameter Estimates ◽  
Primordial Black Holes ◽  
Microwave Background

scholarly journals Searching for dark matter constituents with many solar masses

2016 ◽  
Vol 31 (16) ◽  
pp. 1650093 ◽  
Author(s):  
Paul H. Frampton
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Cosmic Microwave Background ◽  
Massive Particle ◽  
Search Strategies ◽  
Observational Constraints ◽  
Primordial Black Holes ◽  
Microwave Background ◽  
Weak Scale ◽  
Weakly Interacting

Searches for dark matter (DM) constituents are presently mainly focused on axions and weakly interacting massive particle (WIMPs) despite the fact that far higher mass constituents are viable. We discuss and dispute whether axions exist and those arguments for WIMPs which arise from weak scale supersymmetry. We focus on the highest possible masses and argue that, since if they constitute all DM, they cannot be baryonic, they must uniquely be primordial black holes. Observational constraints require them to be of intermediate masses mostly between ten and a hundred thousand solar masses. Known search strategies for such PIMBHs include wide binaries, cosmic microwave background (CMB) distortion and, most promisingly, extended microlensing experiments.

scholarly journals Maximum PBH mass and primordiality

2018 ◽  
Vol 33 (31) ◽  
pp. 1850176
Author(s):  
Paul H. Frampton
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Cosmic Microwave Background ◽  
Observational Data ◽  
Supermassive Black Holes ◽  
Primordial Black Holes ◽  
Black Hole Mass ◽  
Microwave Background

In order to avoid unacceptable [Formula: see text]-distortions inconsistent with observational data on the Cosmic Microwave Background, Primordial Black Holes (PBHs) must be less massive than [Formula: see text], quite closely above the highest black hole mass yet observed. This comparableness leads us to posit that all supermassive black holes originate as PBHs.

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