135 citations · 528 across the 11 of their papers we have counts for
12 papers
Gravitational Field Inside and Near a Caustic Ring
Heywood Tam
We present an analytic calculation of the gravitational field inside and near a caustic ring of dark matter. The calculation may facilitate N-body simulation studies on the effects…
Axion BEC Dark Matter
Ozgur Erken, Pierre Sikivie, Heywood Tam +1
Cold dark matter axions thermalize through gravitational self-interactions and form a Bose-Einstein condensate when the photon temperature reaches approximately 500 eV. Axion Bose-…
Cosmic axion thermalization
O. Erken, P. Sikivie, H. Tam +1
Axions differ from the other cold dark matter candidates in that they form a degenerate Bose gas. It is shown that their huge quantum degeneracy and large correlation length cause…
Cosmic Ray Protons Illuminate Dark Matter Axions
H. Tam, Q. Yang
Cosmic ray protons propagating in a spatially-homogeneous but time-dependent field of axions or axion-like particles (ALPs) emit photons in a way that is reminiscent of Cherenkov r…
Production and Detection of Axion-like Particles by Interferometry
H. Tam, Q. Yang
We propose an interferometry experiment for the detection of axion-like particles (ALPs). As in ordinary photon-regeneration (light shining through a wall) experiments, a laser bea…
Axion Dark Matter and Cosmological Parameters
O. Erken, P. Sikivie, H. Tam +1
We observe that photon cooling after big bang nucleosynthesis (BBN) but before recombination can remove the conflict between the observed and theoretically predicted value of the p…