Indirect Dark Matter Detection Limits from the Ultra-Faint Milky Way Satellite Segue 1

Journal Article · Thu Aug 11 00:00:00 EDT 2011 · Phys.Rev.D82:123503,2010

OSTI ID:1023777

Essig, Rouven; Sehgal, Neelima; Strigari, Louis E; Geha, Marla; Simon, Joshua D

We use new kinematic data from the ultra-faint Milky Way satellite Segue 1 to model its dark matter distribution and derive upper limits on the dark matter annihilation cross-section. Using gamma-ray ux upper limits from the Fermi satellite and MAGIC, we determine cross-section exclusion regions for dark matter annihilation into a variety of different particles including charged leptons. We show that these exclusion regions are beginning to probe the regions of interest for a dark matter interpretation of the electron and positron uxes from PAMELA, Fermi, and HESS, and that future observations of Segue 1 have strong prospects for testing such an interpretation. We additionally discuss prospects for detecting annihilation with neutrinos using the IceCube detector, finding that in an optimistic scenario a few neutrino events may be detected. Finally we use the kinematic data to model the Segue 1 dark matter velocity dispersion and constrain Sommerfeld enhanced models.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1023777
• Report Number(s): SLAC-PUB-14200; PRVDAQ; arXiv:1007.4199; TRN: US1105059
• Journal Information: Phys.Rev.D82:123503,2010, Vol. 82; ISSN 1550-7998
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANNIHILATION
CROSS SECTIONS
DETECTION
DISPERSIONS
DISTRIBUTION
ELECTRONS
GAMMA RADIATION
LEPTONS
MILKY WAY
NEUTRINOS
NONLUMINOUS MATTER
PARTICLES
POSITRONS
SATELLITES
SENSITIVITY
VELOCITY
Astrophysics
ASTRO