Maximum black hole mass across cosmic time

Massive Black Holes across Cosmic Time Massive Black Holes across Cosmic Time

Scale Invariant Jet Suppression Across the Black Hole Mass Scale

We provide a schematic framework for understanding observations of jet suppression in soft state black hole X-ray binaries based on the Blandford-Payne process and the net magnetic flux threading the black hole. Due to the geometrical thinness of soft state disks, mass-loading of field lines is ineffective compared to both geometrically thick disks as well as thin disks with greater black hole ...

Black-hole Mass Measurements

The applicability and apparent uncertainties of the techniques currently available for measuring or estimating black-hole masses in AGNs are briefly summarized.

Cosmic Evolution and Primordial Black Hole Evaporation

A cosmological model in which primordial black holes (PBHs) are present in the cosmic fluid at some instant t = t0 is investigated. The time t0 is naturally identified with the end of the inflationary period. The PBHs are assumed to be nonrelativistic in the comoving fluid, to have the same mass, and may be subject to evaporation for t > t0. Our present work is related to an earlier paper of Zi...

Testing cosmic censorship with black hole collisions.

There exists an upper limit on the mass of black holes when the cosmological constant Λ is positive. We study the collision of two black holes whose total mass exceeds this limit. Our investigation is based on a recently discovered exact solution describing the collision of Q = M black holes with Λ > 0. The global structure of this solution is analyzed. We find that if the total mass is less th...