arXiv:1505.07538·v2·High Energy Physics — Phenomenology
Gravitational Focusing and Substructure Effects on the Rate Modulation in Direct Dark Matter Searches
Eugenio Del Nobile🇺🇸 · Graciela B. Gelmini🇺🇸 · Samuel J. Witte🇺🇸
Abstract
We study how gravitational focusing (GF) of dark matter by the Sun affects the annual and biannual modulation of the expected signal in non-directional direct dark matter searches, in the presence of dark matter substructure in the local dark halo. We consider the Sagittarius stream and a possible dark disk, and show that GF suppresses some, but not all, of the distinguishing features that would characterize substructure of the dark halo were GF neglected.
Comments: 16 pages, 9 figures. v2: A section with estimates of the required number of events has been added