Gravitational focusing and substructure effects on the rate modulation in direct dark matter searches

Journal Article · Fri Aug 21 00:00:00 EDT 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/08/041· OSTI ID:22458439

Nobile, Eugenio Del; Gelmini, Graciela B.; Witte, Samuel J. ^[1]

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1. Department of Physics and Astronomy, UCLA,475 Portola Plaza, Los Angeles, CA 90095 (United States)

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.

• Sponsoring Organization: SCOAP3, CERN, Geneva (Switzerland)
• OSTI ID: 22458439
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 08; Other Information: PUBLISHER-ID: JCAP08(2015)041; OAI: oai:repo.scoap3.org:11444; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FOCUSING
GRAVITATION
MODULATION
NONLUMINOUS MATTER
SIGNALS
SUN