2013
DOI: 10.1088/0004-637x/773/1/61
|View full text |Cite
|
Sign up to set email alerts
|

A Deep Search for Extended Radio Continuum Emission From Dwarf Spheroidal Galaxies: Implications for Particle Dark Matter

Abstract: We present deep radio observations of four nearby dwarf spheroidal (dSph) galaxies, designed to detect extended synchrotron emission resulting from weakly interacting massive particle (WIMP) dark matter annihilations in their halos. Models by Colafrancesco et al. (CPU07) predict the existence of angularly large, smoothly distributed radio halos in such systems, that stem from electron and positron annihilation products spiraling in a turbulent magnetic field. We map a total of 40.5 deg 2 around the Draco, Ursa… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1

Citation Types

5
86
0

Year Published

2014
2014
2024
2024

Publication Types

Select...
9

Relationship

1
8

Authors

Journals

citations
Cited by 65 publications
(91 citation statements)
references
References 73 publications
5
86
0
Order By: Relevance
“…The analysis most directly comparable to ours has been recently presented in Refs. [32,33]. It is based on radio observations of the Ursa Major II and Willman 1 FoVs at 1.4 GHz with the GBT telescope.…”
Section: Comparison With Previous Workmentioning
confidence: 99%
See 1 more Smart Citation
“…The analysis most directly comparable to ours has been recently presented in Refs. [32,33]. It is based on radio observations of the Ursa Major II and Willman 1 FoVs at 1.4 GHz with the GBT telescope.…”
Section: Comparison With Previous Workmentioning
confidence: 99%
“…For a scenario where the DM annihilates into b −b, the DM spatial distribution follows an NFW profile, the magnetic field strength is B = 1 µG, and the cosmic-ray particle diffusion is described as in the case of the Galaxy, Ref. [32] found σ a v < 2.5 · 10 −24 cm 3 /s for M χ = 100 GeV at 95% C.L. (for a more extended discussion, see Ref.…”
Section: Introductionmentioning
confidence: 99%
“…This motivates the use of Milky Way dwarf galaxies as annihilation targets, an idea first suggested by [38] and further explored in [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] (among others). These sources have very high mass-to-light ratios and are free of any known astrophysical sources of gamma-rays.…”
Section: Introductionmentioning
confidence: 99%
“…A recent attempt in the same direction but making use of single dish observations was performed by (Spekkens et al 2013;Natarajan et al 2013) with the Green Bank Telescope.…”
Section: Introductionmentioning
confidence: 99%