Shocking signals of dark matter annihilation

Davis, Jonathan H.; Silk, Joseph; Bœhm, Céline; Kotera, Kumiko; Norman, C.

doi:10.1103/physrevd.93.103523

Cited by 1 publication

(2 citation statements)

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“…Here we consider only prompt emission. We disregard any acceleration process [14] or secondary emission [25,27] that could distort the prompt spectrum. Here we examine whether this prompt emission is sufficient to explain the anomalous spectral component between 2.6 GeV and ∼ 5 TeV.…”

Section: A Dark Mattermentioning

confidence: 99%

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Discovery of a new extragalactic population of energetic particles

et al. 2017

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Citation for published item:frownD enthony wF nd foehmD g¡ eline nd qr h mD t mie nd v roixD hom s nd gh dwi kD ul nd ilkD toseph @PHIUA 9his overy of new extr g l ti popul tion of energeti p rti lesF9D hysi l review hFD WS @TAF HTQHIVF Further information on publisher's website:httpsXGGdoiForgGIHFIIHQG hys evhFWSFHTQHIV Publisher's copyright statement: eprinted with permission from the emeri n hysi l o ietyX frownD enthony wFD foehmD g¡ elineD qr h mD t mieD v roixD hom sD gh dwi kD ul ilkD toseph @PHIUAF his overy of new extr g l ti popul tion of energeti p rti lesF hysi l eview h WS@TAX HTQHIV @PHIUA y the emeri n hysi l o ietyF e ders m y viewD rowseD ndGor downlo d m teri l for tempor ry opying purposes onlyD provided these uses re for non ommer i l person l purposesF ix ept s provided y l wD this m teri l m y not e further reprodu edD distri utedD tr nsmittedD modi(edD d ptedD performedD displ yedD pu lishedD or sold in whole or p rtD without prior written permission from the emeri n hysi l o ietyF Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We report the discovery of a statistically significant hardening in the Fermi-LAT γ-ray spectrum of Centaurus A's (Cen A) core, with the spectral index hardening from Γ 1 ¼ 2.73 AE 0.02 to Γ 1 ¼ 2.29 AE 0.07 at a break energy of ð2.6 AE 0.3Þ GeV. Using a likelihood analysis, we find no evidence for flux variability in Cen A's core light curve above or below the spectral break when considering the entire 8 year period. Interestingly, however, the first ∼3.5 years of the low energy light curve shows evidence of flux variability at the ∼3.5σ confidence level. To understand the origin of this spectral break, we assume that the low energy component below the break feature originates from leptons in Centaurus A's radio jet, and we investigate the possibility that the high energy component above the spectral break is due to an additional source of very high energy particles near the core of Cen A. We show for the first time that the observed γ-ray spectrum of an active galactic nucleus is compatible with either a very large localized enhancement (referred to as a spike) in the dark matter halo profile or a population of millisecond pulsars. Our work constitutes the first robust indication that new γ-ray production mechanisms can explain the emission from active galaxies and could provide tantalizing first evidence for the clustering of heavy dark matter particles around black holes.

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Section: A Dark Mattermentioning

confidence: 99%

“…Here we consider only prompt emission. We disregard any acceleration process [14] or secondary emission [25,27] that could distort the prompt spectrum.…”

Section: A Dark Mattermentioning

confidence: 99%