3 papers
astro-ph.CO2020
Constraints on Stupendously Large Black Holes
Bernard Carr, Florian Kuhnel, Luca Visinelli
We consider the observational constraints on stupendously large black holes (SLABs) in the mass range . These have attracted little attention hitherto…
astro-ph.CO2019
Compact Dark Matter Objects via Dark Sectors
Gia Dvali, Emmanouil Koutsangelas, Florian Kuhnel
We propose a novel class of compact dark matter objects in theories where the dark matter consists of multiple sectors. We call these objects -MACHOs. In such theories neither t…
astro-ph.CO2019
Cosmic Conundra Explained by Thermal History and Primordial Black Holes
Bernard Carr, Sebastien Clesse, Juan Garcia-Bellido +1
A universal mechanism may be responsible for several unresolved cosmic conundra. The sudden drop in the pressure of relativistic matter at decoupling, the quark--ha…