8 citations · 16 across the 9 of their papers we have counts for
9 papers
Fine-tuning in mixed Dark Matter models with Primordial Black Hole relics
Amirah Aljazaeri, Christian T. Byrnes
We investigate the fine-tuning of a tripartite dark matter (DM) scenario involving ultra-light primordial black holes (PBHs), whose evaporation before Big Bang Nucleosynthesis leav…
Cosmological accretion onto braneworld black holes: a relativistic treatment
Itzi Aldecoa-Tamayo, Christian T. Byrnes, David Seery
Higher-dimensional black holes have been extensively studied over the years, primarily from heuristic and fundamental perspectives or within the context of holographic applications…
aurel: A Python package for automatic relativistic calculations
Robyn L. Munoz, Christian T. Byrnes, Will J. Roper
\texttt{aurel} is an open-source Python package designed to \emph{au}tomatically calculate \emph{rel}ativistic quantities. It uses an efficient, flexible and user-friendly caching…
Primordial black holes in Randall-Sundrum: Cosmological signatures
Itzi Aldecoa-Tamayo, Christian T. Byrnes, David Seery
We reconsider primordial black hole physics in Randall-Sundrum Type-II universes, focusing on constraints from cosmological and astrophysical observables. We pay particular attenti…
Comprehensively Constraining Ultra-Light Primordial Black Holes Through Relic Formation and Early Mergers
Amirah Aljazaeri, Christian T. Byrnes
We investigate constraints on the least explored, smallest mass scales of primordial black holes (PBHs), which evaporate prior to Big Bang Nucleosynthesis (BBN). Our study examines…
Curvaton in light of the ACT results
Christian T. Byrnes, Marina Cortês, Andrew R. Liddle
The latest results from the Atacama Cosmology Telescope Collaboration have moved the preferred perturbation spectral index closer towards one. We reanalyse constraints…
Robust μ-distortion constraints on primordial supermassive black holes from cubic (gNL) non-Gaussian perturbations
Xavier Pritchard, Christian T. Byrnes, Julien Lesgourgues +1
We make the first calculation of the spectral distortion constraints on the primordial curvature power spectrum in the limit of large cubic non-Gaussianity. This calculation involv…
Robust -distortion constraints on primordial supermassive black holes from non-Gaussian perturbations
Christian T. Byrnes, Julien Lesgourgues, Devanshu Sharma
Explaining the origin of supermassive black holes via a primordial origin is severely challenged by the tight spectral distortion constraints on the amplitude of the primordial per…
Spectral distortions from acoustic dissipation with non-Gaussian (or not) perturbations
Devanshu Sharma, Julien Lesgourgues, Christian T. Byrnes
A well-known route to form primordial black holes in the early universe relies on the existence of unusually large primordial curvature fluctuations, confined to a narrow range of…