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74 papers · 2 filters
An estimation of local bulk flow with the maximum-likelihood method
Yin-Zhe Ma, Jun Pan
A maximum-likelihood method, tested as an unbiased estimator from numerical simulations, is used to estimate cosmic bulk flow from peculiar velocity surveys. The likelihood functio…
First Measurement of the Cross-Correlation of CMB Lensing and Galaxy Lensing
Nick Hand, Alexie Leauthaud, Sudeep Das +33
We measure the cross-correlation of cosmic microwave background lensing convergence maps derived from Atacama Cosmology Telescope data with galaxy lensing convergence maps as measu…
Perturbative Reheating After Multiple-Field Inflation: The Impact on Primordial Observables
Joel Meyers, Ewan R. M. Tarrant
We study the impact of perturbative reheating on primordial observables in models of multiple-field inflation. By performing a sudden decay calculation, we derive analytic expressi…
Measurement of Neutrino Masses from Relative Velocities
Hong-Ming Zhu, Ue-Li Pen, Xuelei Chen +2
We present a new technique to measure neutrino masses using their flow field relative to dark matter. Present day streaming motions of neutrinos relative to dark matter and baryons…
The dark matter of galaxy voids
P. M. Sutter, Guilhem Lavaux, Benjamin D. Wandelt +2
How do observed voids relate to the underlying dark matter distribution? To examine the spatial distribution of dark matter contained within voids identified in galaxy surveys, we…
Clustering in the Phase Space of Dark Matter Haloes. II. Stable Clustering and Dark Matter Annihilation
Jesus Zavala, Niayesh Afshordi
We present a model for the structure of the particle phase space average density () in galactic haloes, introduced recently as a novel measure of the clustering of dark mat…