activity
20192025
most citedThe nanohertz stochastic gravitational wave background from cosmic string loops and the abundant high redshift massive galaxies

84 citations · 202 across the 10 of their papers we have counts for

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2 papers · 1 filter

astro-ph.CO2025

Direct Collapse Supermassive Black Holes from Ultralight Dark Matter

Hao Jiao, Robert Brandenberger, Vahid Kamali

We study the possibility that parametric resonant excitation of photons in an ultralight dark matter halo could generate the required flux of Lyman-Werner photons to allow the dire…

hep-ph2025

Cosmological Magnetic Fields from Ultralight Dark Matter

Robert Brandenberger, Jürg Fröhlich, Hao Jiao

We propose a mechanism for the generation of magnetic fields on cosmological scales that is operative after recombination. An essential ingredient is an instability (of parametric…