Caustics, Cold Flows, and Annual Modulation

Author:

Natarajan Aravind1

Affiliation:

1. Department of Physics, McWilliams Center for Cosmology, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA

Abstract

We discuss the formation of dark matter caustics, and their possible detection by future dark matter experiments. The annual modulation expected in the recoil rate measured by a dark matter detector is discussed. We consider the example of dark matter particles with a Maxwell-Boltzmann velocity distribution modified by a cold stream due to a nearby caustic. It is shown that the effect of the caustic flow is potentially detectable, even when the density enhancement due to the caustic is small. This makes the annual modulation effect an excellent probe of inner caustics. We also show that the phase of the annual modulation at low recoil energies does not constrain the particle mass unless the velocity distribution of particles in the solar neighborhood is known.

Funder

Bruce and Astrid McWilliams Postdoctoral Fellowship

Publisher

Hindawi Limited

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Direct and indirect detection of dissipative dark matter;Journal of Cosmology and Astroparticle Physics;2014-06-27

2. Colloquium: Annual modulation of dark matter;Reviews of Modern Physics;2013-11-01

3. Direct detection of dynamical dark matter;Physical Review D;2012-09-17

4. Probing dark matter streams with CoGeNT;Physical Review D;2011-11-15

5. DAMA and the self-similar infall halo model;Physical Review D;2011-02-18

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