Search for gamma-ray emission from dark matter annihilation in the Small Magellanic Cloud with the Fermi Large Area Telescope

Caputo, Regina; Buckley, Matthew R.; Martin, Pierrick; Charles, Eric; Brooks, Alyson M.; Drlica-Wagner, Alex; Gaskins, Jennifer M.; Wood, Matthew

doi:10.1103/PhysRevD.93.062004

Title: Search for gamma-ray emission from dark matter annihilation in the Small Magellanic Cloud with the Fermi Large Area Telescope

Journal Article · Tue Mar 22 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.062004· OSTI ID:1327421

^[1];

^[2]; Martin, Pierrick ^[3]; Charles, Eric ^[4]; Brooks, Alyson M. ^[2]; Drlica-Wagner, Alex ^[5]; Gaskins, Jennifer M. ^[6]; Wood, Matthew ^[4]

Univ. of California at Santa Cruz, Santa Cruz, CA (United States)
Rutgers Univ., Piscataway, NJ (United States)
CNRS, IRAP, Toulouse cedex (France)
Stanford Univ., Stanford, CA (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Univ. of Amsterdam, Amsterdam (The Netherlands)

The Small Magellanic Cloud (SMC) is the second-largest satellite galaxy of the Milky Way and is only 60 kpc away. As a nearby, massive, and dense object with relatively low astrophysical backgrounds, it is a natural target for dark matter indirect detection searches. In this work, we use six years of Pass 8 data from the Fermi Large Area Telescope to search for gamma-ray signals of dark matter annihilation in the SMC. Using data-driven ts to the gamma-ray backgrounds, and a combination of N-body simulations and direct measurements of rotation curves to estimate the SMC DM density pro le, we found that the SMC was well described by standard astrophysical sources, and no signal from dark matter annihilation was detected. We set conservative upper limits on the dark matter annihilation cross section. These constraints are in agreement with stronger constraints set by searches in the Large Magellanic Cloud and approach the canonical thermal relic cross section at dark matter masses lower than 10 GeV in the bb¯and τ⁺τ⁻ channels.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359; AC02-76SF00515

OSTI ID:: 1327421

Alternate ID(s):: OSTI ID: 1242881; OSTI ID: 1355680

Report Number(s):: arXiv:1603.00965; FERMILAB-PUB-16-408-AE; PRVDAQ; 1425917

Journal Information:: Physical Review D, Vol. 93, Issue 6; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 28 works

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79 ASTRONOMY AND ASTROPHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Title: Search for gamma-ray emission from dark matter annihilation in the Small Magellanic Cloud with the Fermi Large Area Telescope

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