2011MNRAS.410.2463S

Query : 2011MNRAS.410.2463S

2011MNRAS.410.2463S - Mon. Not. R. Astron. Soc., 410, 2463-2471 (2011/February-1)

Radio emission from dark matter annihilation in the Large Magellanic Cloud.

SIFFERT B.B., LIMONE A., BORRIELLO E., LONGO G. and MIELE G.

Abstract (from CDS):

The Large Magellanic Cloud (LMC), at only 50 kpc away from us and known to be dark matter dominated, is clearly an interesting place where to search for dark matter annihilation signals. In this paper, we estimate the synchrotron emission due to weakly interacting massive particle (WIMP) annihilation in the halo of the LMC at two radio frequencies, 1.4 and 4.8 GHz, and compare it to the observed emission, in order to impose constraints in the WIMP mass versus annihilation cross-section plane. We use available Faraday rotation data from background sources to estimate the magnitude of the magnetic field in different regions of the LMC's disc, where we calculate the radio signal due to dark matter annihilation. We account for the e+e– energy losses due to synchrotron, inverse Compton scattering and bremsstrahlung, using the observed hydrogen and dust temperature distribution on the LMC to estimate their efficiency. The extensive use of observations, allied with conservative choices adopted in all the steps of the calculation, allows us to obtain very realistic constraints.

Abstract Copyright: 2010 The Authors. Journal compilation2010 RAS

Journal keyword(s): magnetic fields - galaxies: individual: Large Magellanic Cloud - dark matter - radio continuum: galaxies

Nomenclature: Fig. 1, Table 1: [SLB2011] NN (Nos 1-23).

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
2 [SLB2011] 20 Rad 04 51 36.413 -66 51 26.34           ~ 1 0
3 MDM 20 Rad 04 51 36.413 -66 51 26.34           ~ 3 0
4 [SLB2011] 17 Rad 04 56 57.832 -68 50 35.85           ~ 1 0
5 [SLB2011] 15 Rad 05 02 44.925 -66 00 28.26           ~ 1 0
6 [SLB2011] 13 Rad 05 06 19.726 -71 08 26.64           ~ 1 0
7 [SLB2011] 10 Rad 05 10 21.596 -67 17 12.72           ~ 1 0
8 [SLB2011] 6 Rad 05 10 45.796 -68 05 11.09           ~ 1 0
9 [SLB2011] 8 Rad 05 11 01.258 -69 34 40.98           ~ 1 0
10 [SLB2011] 2 Rad 05 13 14.664 -69 31 17.19           ~ 1 0
11 PMN J0517-7024 Rad 05 17 15.89 -70 23 56.1           ~ 9 1
12 MDM 8 Rad 05 18 51.899 -67 45 54.21           ~ 2 0
13 LI-LMC 804 SNR 05 19 05.28 -69 36 30.8           ~ 12 0
14 NAME LMC B0523-7040 Rad 05 22 28.8 -70 37 56           ~ 8 1
15 MDM 17 Rad 05 22 57.600 -67 29 16.80           ~ 2 0
16 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
17 [SLB2011] 14 Rad 05 26 09.659 -66 00 02.93           ~ 1 0
18 PMN J0526-6749 rG 05 26 35.28713 -67 49 08.4565           ~ 18 1
19 MDM 32 rG 05 27 49.080 -70 36 41.70 19.557 19.498 18.879 19.090 18.495 ~ 21 0
20 MDM 58 Rad 05 34 13.644 -67 55 04.42           ~ 3 0
21 MDM 82 Rad 05 40 54.847 -67 41 04.43           ~ 3 0
22 MC4 0541-68.0 Rad 05 41 11.743 -68 03 33.24           ~ 5 0
23 MDM 95 Rad 05 45 23.757 -68 42 57.08           ~ 3 0
24 [SLB2011] 22 Rad 05 50 19.691 -69 00 39.60           ~ 1 0
25 PMN J0552-6947 Rad 05 52 28.6 -69 48 00           ~ 9 1

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