Detection of neutralino annihilation photons from external galaxies

Baltz, Edward A.; Briot, C.; Salati, Pierre; Taillet, R.; Silk, Joseph

doi:10.1103/physrevd.61.023514

Cited by 118 publications

(131 citation statements)

References 31 publications

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“…As satellite experiments have much wider field of views and will provide a full sky coverage, they will test the hypothesis of gamma-rays emitted in clumps of dark matter which may be present in the halo [115,110,116,117]. Another possibility which has been considered is the case of gamma-ray fluxes from external nearby galaxies [118]. Furthermore, it has been proposed to search for an extragalactic flux originated by all cosmological annihilations of dark matter particles [119,120].…”

Section: Sources and Fluxesmentioning

confidence: 99%

DarkSUSY: computing supersymmetric dark matter properties numerically

Gondolo

Edsjö

Ullio

et al. 2004

J. Cosmol. Astropart. Phys.

910

1,059

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The question of the nature of the dark matter in the Universe remains one of the most outstanding unsolved problems in basic science. One of the best motivated particle physics candidates is the lightest supersymmetric particle, assumed to be the lightest neutralino -a linear combination of the supersymmetric partners of the photon, the Z boson and neutral scalar Higgs particles. Here we describe DarkSUSY, a publicly-available advanced numerical package for neutralino dark matter calculations. In DarkSUSY one can compute the neutralino density in the Universe today using precision methods which include resonances, pair production thresholds and coannihilations. Masses and mixings of supersymmetric particles can be computed within DarkSUSY or with the help of external programs such as FeynHiggs, ISASUGRA and SUSPECT. Accelerator bounds can be checked to identify viable dark matter candidates. DarkSUSY also computes a large variety of astrophysical signals from neutralino dark matter, such as direct detection in low-background counting experiments and indirect detection through antiprotons, antideuterons, gamma-rays and positrons from the Galactic halo or high-energy neutrinos from the center of the Earth or of the Sun. Here we describe the physics behind the package. A detailed manual will be provided with the computer package.

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Section: Sources and Fluxesmentioning

confidence: 99%

DarkSUSY: computing supersymmetric dark matter properties numerically

Gondolo

Edsjö

Ullio

et al. 2004

J. Cosmol. Astropart. Phys.

910

1,059

View full text Add to dashboard Cite

show abstract

“…Some suggested explanations for the VHE γ-ray emission were ruled out (e.g. dark matter annihilation, Baltz et al 2000). At the same time, various VHE γ-ray jet emission models were proposed: leptonic (Georganopoulos et al 2005;Lenain et al 2008) and hadronic (Reimer et al 2004) ones.…”

mentioning

confidence: 99%

A lepto-hadronic model for high-energy emission from FR I radiogalaxies

Reynoso

Medina

Romero

2011

A&A

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Context. The well known radiogalaxy Cen A has been recently detected as a source of very high energy (VHE) γ-rays by the HESS experiment just before Fermi/LAT detected it at high energies (HE). The detection, together with that of M 87, established radiogalaxies as VHE γ-ray emitters. Aims. The aim of this work is to present a lepto-hadronic model for the VHE emission from the relativistic jets in FR I radiogalaxies. Methods. We consider that protons and electrons are accelerated in a compact region near the base of the jet, and they cool emitting multi wavelength radiation as propagating along the jet. The proton and electron distributions are obtained through steady-state transport equation taking into account acceleration, radiative and non-radiative cooling processes, as well as particle transport by convection. Results. Considering the effects of photon absorption at different wavelengths, we calculate the radiation emitted by the primary protons and electrons, as well as the contribution of secondaries particles (e ± , πs and μs). The expected high-energy neutrino signal is also obtained and the possibility of detections with KM3NeT and IceCube is discussed. Conclusions. The spectral energy distribution obtained in our model with an appropriate set of parameters for an extended emission zone can account for much of the observed spectra for both AGNs.

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“…Past work in the literature considered detecting γ-rays from dark matter annihilation in Milky Way-bound dark matter halos: dSphs were studied in [14,21,22,23,24], more massive galaxies in the local group were considered in [25], potentially dark subhalos were studied in [26,27,28,29,30,31], and the prospects of detecting microhalos were explored in [32,33].…”

mentioning

confidence: 99%

Precise constraints on the dark matter content of Milky Way dwarf galaxies for gamma-ray experiments

et al. 2007

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We examine the prospects for detecting γ-rays from dark matter annihilation in the six most promising dwarf spheroidal (dSph) satellite galaxies of the Milky Way. We use recently-measured velocity dispersion profiles to provide a systematic investigation of the dark matter mass distribution of each galaxy, and show that the uncertainty in the γ-ray flux from mass modeling is less than a factor of ∼ 5 for each dSph if we assume a smooth NFW profile. We show that Ursa Minor and Draco are the most promising dSphs for γ-ray detection with GLAST and other planned observatories. For each dSph, we investigate the flux enhancement resulting from halo substructure, and show that the enhancement factor relative to a smooth halo flux cannot be greater than about 100. This enhancement depends very weakly on the lower mass cut-off scale of the substructure mass function. While the amplitude of the expected flux from each dSph depends sensitively on the dark matter model, we show that the flux ratios between the six Sphs are known to within a factor of about 10. The flux ratios are also relatively insensitive to the current theoretical range of cold dark matter halo central slopes and substructure fractions.

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Detection of neutralino annihilation photons from external galaxies

Cited by 118 publications

References 31 publications

DarkSUSY: computing supersymmetric dark matter properties numerically

DarkSUSY: computing supersymmetric dark matter properties numerically

A lepto-hadronic model for high-energy emission from FR I radiogalaxies

Precise constraints on the dark matter content of Milky Way dwarf galaxies for gamma-ray experiments

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