2024MNRAS.529.1271E

Query : 2024MNRAS.529.1271E

2024MNRAS.529.1271E - Mon. Not. R. Astron. Soc., 529, 1271-1282 (2024/April-1)

MHz to TeV expectations from scotogenic WIMP dark matter.

EISENBERGER L., SIEGERT T., MANNHEIM K. and POROD W.

Abstract (from CDS):

The indirect search for dark matter is typically restricted to individual photon bands and instruments. In the context of multiwavelength observations, finding a weak signal in large foreground and background at only one wavelength band is hampered by systematic uncertainties dominating the signal strength. Dark matter particle annihilation is producing Standard Model particles of which the prompt photon emission is searched for in many studies. However, also the secondary emission of charged particles from dark matter annihilation in the TeV range results in comparable or even stronger fluxes in the GHz-GeV range. In this study, we calculate the prompt and secondary emission of a scotogenic weakly interacting massive particle (WIMP) with a mass of 1 TeV in 27 dwarf galaxies of the Milky Way. For the secondary emission, we include inverse Compton scattering, bremsstrahlung, and synchrotron radiation, which results in a 'triple hump' structure characteristic for only dark matter and no other astrophysical source. In order to determine the best candidates for multi-instrument analyses, we estimate the diffuse emission component of the Milky Way itself, including its own dark matter halo from the same scotogenic WIMP model. We find signal-to-background ratios of individual sources on the order of 10–3 to 10–2 across X-ray to γ-ray assuming J factors for the cold dark matter distribution inferred from observations and no additional boosting due to small-scale clumping. We argue that a joint multiwavelength analysis of all nearby galaxies and the extension towards the cosmic gamma-ray background is required to disentangle possible dark matter signals from astrophysical background and foreground.

Abstract Copyright: © 2024 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): galaxies: dwarf - dark matter - gamma-rays: general - radio continuum: general - X-rays: general

Simbad objects: 42

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Number of rows : 42
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 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
2 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
3 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
4 4FGL J0240.8-3401 Bz? 02 40 48.6 -34 01 04           ~ 13 0
5 QSO B0252-549 Bla 02 53 29.1803201880 -54 41 51.437517216   17.65 19.3 16.79   ~ 141 1
6 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
7 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
8 IRAS 06384-5122 Sy1 06 39 40.7696028168 -51 25 14.542837896   16.47 16.8 15.44   ~ 21 0
9 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
10 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
11 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
12 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
13 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
14 4C -01.21 Bla 10 10 51.66669216 -02 00 19.5745005   18.99 18.63 19.1   ~ 99 1
15 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
16 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
17 RX J1048.9+5010 BLL 10 48 57.6133743624 +50 09 45.261947376   20.78 19.84 18.5   ~ 33 0
18 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
19 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
20 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
21 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
22 NGC 4138 Sy2 12 09 29.8011417048 +43 41 06.864140004 12.46 12.29 11.32 10.82   ~ 436 1
23 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
24 RX J1224.4+2436 BLL 12 24 24.1862962656 +24 36 23.499792828   17.93 17.37     ~ 162 1
25 7C 122223.5+213929 Bla 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 770 2
26 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
27 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
28 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
29 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
30 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
31 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
32 3FGL J1650.0+0356 Bla 16 49 37.6 +04 11 33           ~ 18 0
33 NGC 6230W Sy2 16 50 42.7515304704 +04 36 18.277458984   15.5       ~ 56 0
34 4FGL J1650.9+0429 Bz? 16 50 58.69 +04 27 34.0           ~ 15 0
35 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
36 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
37 1RXS J224747.3-585444 Bla 22 47 45.1870939011 -58 54 57.647641802           ~ 12 0
38 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
39 LEDA 3096710 Sy1 22 56 36.4606611288 +05 25 17.097921120   16.2 16.2     ~ 44 0
40 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
41 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
42 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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