8 citations · 17 across the 6 of their papers we have counts for
7 papers
Predictions for a Low-mass Cutoff for the Primordial Black Hole Mass Spectrum
James Barbieri, George Chapline
In this note we outline how a modest violation in the conservation of mass during the merger of two PBHs affects the PBH mass spectrum that we previously obtained using a Boltzmann…
MACHO Messages from the Big Bang
G. Chapline, J. Barbieri
The present day mass spectrum for dark matter compact objects is calculated based on the assumption that a uniform population of PBHs was created at a definite red-shift, and that…
Was there a negative vacuum energy in your past?
George Chapline, James Barbieri
A model for gravitational collapse where the event horizon is a quantum critical phase transition is extended to provide an explanation for the origin of the observable universe, w…
Collective baryon decay and gravitational collapse
George Chapline, James Barbieri
While it is widely believed that the gravitational collapse of a sufficiently large mass will lead to a density singularity and an event horizon, we propose that this never happens…
Magnetosphere of a spinning string
George Chapline, James Barbieri
In this note we observe that the exact Maxwell-Einstein equations in the background metric of a spinning string can be solved analytically. This allows us to construct an analytica…
A signature for the absence of event horizons
J. Barbieri, G. Chapline
A sharp dip in the spectrum of gamma rays coming from compact objects below 70 MeV would be an unambiguous signal that compact astrophysical objects have a physical surface, and th…
High Energy Gamma Rays from Protons Hitting Compact Objects
J. Barbieri, G. Chapline
In a previous paper the spectrum of positrons produced by matter initially at rest falling onto a massive compact object was calculated. In this paper this calculation is generaliz…