40 citations · 122 across the 9 of their papers we have counts for
9 papers
Tidal effects on primordial black hole capture in neutron stars
Ian Holst, Yoann Génolini, Pasquale Dario Serpico
We revisit the problem of the capture of a primordial black hole (PBH) by a neutron star, accounting for the tidal perturbation from a nearby star or planet. For asteroid-mass PBHs…
Clustering and Runaway Merging in a Primordial Black Hole Dominated Universe
Ian Holst, Gordan Krnjaic, Huangyu Xiao
If primordial black holes (PBH) are present in the early universe, their contribution to the energy budget grows relative to that of radiation and generically becomes dominant unle…
A New Determination of the Millisecond Pulsar Gamma-Ray Luminosity Function and Implications for the Galactic Center Gamma-Ray Excess
Ian Holst, Dan Hooper
It has been suggested that the Galactic Center Gamma-Ray Excess (GCE) could be produced by a large number of centrally-located millisecond pulsars. The fact that no such pulsar pop…
Dark Matter Isocurvature from Curvature
Ian Holst, Wayne Hu, Leah Jenks
Isocurvature fluctuations, where the relative number density of particle species spatially varies, can be generated from initially adiabatic, or curvature, fluctuations if the vari…
Diffuse Ultra-High-Energy Gamma-Ray Emission From TeV Halos
Ariane Dekker, Ian Holst, Dan Hooper +3
The LHAASO Collaboration has recently reported a measurement of the diffuse gamma-ray emission from the Galactic Plane at energies between 10 TeV and 1 PeV. While this emission is…
Twin Sterile Neutrino Dark Matter
Ian Holst, Dan Hooper, Gordan Krnjaic +1
We propose that the dark matter of our Universe could be sterile neutrinos which reside within the twin sector of a mirror twin Higgs model. In our scenario, these particles are pr…
AMBER: A Semi-numerical Abundance Matching Box for the Epoch of Reionization
Hy Trac, Nianyi Chen, Ian Holst +2
The Abundance Matching Box for the Epoch of Reionization (AMBER) is a semi-numerical code for modeling the cosmic dawn. The new algorithm is not based on the excursion set formalis…
The Simplest and Most Predictive Model of Muon and Thermal Dark Matter
Ian Holst, Dan Hooper, Gordan Krnjaic
The long-standing muon anomaly may be the result of a new particle species which could also couple to dark matter and mediate its annihilations in the early univer…
Conformally Coupled Scalar in Rotating Black Hole Spacetimes
Finnian Gray, Ian Holst, David Kubiznak +3
We demonstrate separability of conformally coupled scalar field equation in general (off-shell) Kerr-NUT-AdS spacetimes in all dimensions. The separability is intrinsically charact…