Indirect dark matter detection limits from the ultrafaint Milky Way satellite Segue 1

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.123503· OSTI ID:21503732

Essig, Rouven ^[1]; Sehgal, Neelima; Strigari, Louis E ^[2]; Geha, Marla ^[3]; Simon, Joshua D ^[4]

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1. SLAC National Accelerator Laboratory, Stanford, California, 94309 (United States)
2. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, California 94305 (United States)
3. Astronomy Department, Yale University, New Haven, Connecticut 06520 (United States)
4. Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, California 91101 (United States)

We use new kinematic data from the ultrafaint 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 flux 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 fluxes 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.

• OSTI ID: 21503732
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CROSS SECTIONS
DISPERSIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
GALAXIES
GAMMA RADIATION
INTERACTIONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
MATTER
MILKY WAY
NEUTRINOS
NONLUMINOUS MATTER
PARTICLE INTERACTIONS
PARTICLES
POSITRONS
PROBES
RADIATIONS
SATELLITES
SENSITIVITY
SIMULATION
TESTING
VELOCITY