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- Tel Aviv UniversityIL388 papers
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7 papers · 2 filters
Black Holes as "Time Capsules": A Cosmological Graviton Background and the Hubble Tension
Tsvi Piran, Raul Jimenez
Minuscule primordial black holes before the end and after inflation can serve as "time capsules" bringing back energy from the past to a later epoch when they evaporate. As these b…
Testing Bayesian reconstruction methods from peculiar velocities
Aurélien Valade, Noam I Libeskind, Yehuda Hoffman +1
Reconstructing the large scale density and velocity fields from surveys of galaxy distances, is a major challenge for cosmography. The data is very noisy and sparse. Estimated dist…
Constrained simulations of the local Universe with Modified Gravity
Krishna Naidoo, Wojciech A. Hellwing, Maciej Bilicki +3
We present a methodology for constructing modified gravity (MG) constrained simulations of the local Universe using positions and peculiar velocities from the CosmicFlows data set.…
Estimation of the masses in the Local Group by Gradient Boosted Decision Trees
Edoardo Carlesi, Yehuda Hoffman, Noam Libeskind
Our goal is to estimate the mass of the Local Group (LG) and the individual masses of its primary galaxies, the M31 and the Milky Way (MW). We do this by means of a supervised mach…
Hamiltonian Monte Carlo reconstruction from peculiar velocities
Aurélien Valade, Yehuda Hoffman, Noam I Libeskind +1
The problem of the reconstruction of the large scale density and velocity fields from peculiar velocities surveys is addressed here within a Bayesian framework by means of Hamilton…
Correlating Gravitational Wave and Gamma-ray Signals from Primordial Black Holes
Kaustubh Agashe, Jae Hyeok Chang, Steven J. Clark +3
Asteroid-mass primordial black holes (PBH) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These PBH can prod…