High-energy gamma rays and neutrinos from nearby radio galaxies

Blanco, Carlos

doi:10.1088/1475-7516/2017/12/017

Cited by 15 publications

(19 citation statements)

References 149 publications

(242 reference statements)

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“…The spectrum and trajectory of very high-energy gamma rays propagating through radiation and magnetic fields is continuously shaped by the production and development of electromagnetic cascades [69][70][71][72][73][74]. In this section, we describe these gamma-ray induced cascades and their impact on indirect searches for very heavy dark matter particles.…”

Section: Gamma-ray Attenuation and Electromagnetic Cascadesmentioning

confidence: 99%

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Novel gamma-ray signatures of PeV-scale dark matter

Blanco

Harding

2018

J. Cosmol. Astropart. Phys.

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The gamma-ray annihilation and decay products of very heavy dark matter particles can undergo attenuation through pair production, leading to the development of electromagnetic cascades. This has a significant impact not only on the spectral shape of the gamma-ray signal, but also on the angular distribution of the observed photons. Such phenomena are particularly important in light of the new HAWC experiment, which provides unprecedented sensitivity to multi-TeV photons and thus to very heavy dark matter particles. In this study, we focus on dark matter in the 100 TeV-100 PeV mass range, and calculate the spectral and angular distribution of gamma-rays from dwarf galaxies and from nearby galaxy clusters in this class of models.

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Section: Gamma-ray Attenuation and Electromagnetic Cascadesmentioning

confidence: 99%

“…3.1 and following the procedure described in Ref. [69]. Pair production within Virgo is again dominated by scattering with the CMB (the energy densities in the infrared, optical, and ultraviolet radiation fields within Virgo are approximately two orders of magnitude lower than that of the CMB [99]).…”

Section: Gamma-rays From Dwarf Galaxiesmentioning

confidence: 99%

Novel gamma-ray signatures of PeV-scale dark matter

Blanco

Harding

2018

J. Cosmol. Astropart. Phys.

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“…So far, a coincident detection between a high-energy neutrino and any known GRB has not been found (Achterberg et al 2008;). Starburst galaxies and other types of AGN such as radio-quiet quasars (Stecker & Salamon 1996;Alvarez-Muñiz & Mészáros 2004), low luminosity AGN (LLAGN) (Kimura et al 2015) or radio galaxies (Becker Tjus et al 2014;Hooper 2016;Blanco & Hooper 2017) remain potential candidates for the observed diffuse neutrino flux.…”

Section: Introductionmentioning

confidence: 99%

On the Detection Potential of Blazar Flares for Current Neutrino Telescopes

Kreter

Kadler

Krauß

et al. 2020

ApJ

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Blazar jets are extreme environments, in which relativistic proton interactions with an ultraviolet photon field could give rise to photopion production. High-confidence associations of individual highenergy neutrinos with blazar flares could be achieved via spatially and temporally coincident detections. In 2017, the track-like, extremely high-energy neutrino event IC 170922A was found to coincide with increased γ-ray emission from the blazar TXS 0506+056, leading to the identification of the most promising neutrino point source candidate so far. We calculate the expected number of neutrino events that can be detected with IceCube, based on a broadband parametrization of bright short-term blazar flares that were observed in the first 6.5 years of Fermi /LAT observations. We find that the integrated keV-to-GeV fluence of most individual blazar flares is far too small to yield a substantial Poisson probability for the detection of one or more neutrinos with IceCube. We show that the sample of potentially detectable high-energy neutrinos from individual blazar flares is rather small. We further show that the blazars 3C 279 and PKS 1510−089 dominate the all-sky neutrino prediction from bright and short-term blazar flares. In the end, we discuss strategies to search for more significant associations in future data unblindings of IceCube and KM3NeT.

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“…The analyisis presented here is developed under the AMON framework. The purpose of the this analysis is to search for transient or variable sources that can produce both gamma rays and neutrinos, specially sources like blazars or radio galaxies [7].…”

Section: Introductionmentioning

confidence: 99%

AMON: TeV Gamma and Neutrino Coincidence Alerts from HAWC and IceCube subthreshold data

Ayala¹,

Amon²

2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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The era of multimessenger astrophysics has arrived with the simultaneous operation of large cosmic-ray, gamma-ray, neutrino, and gravitational-wave observatories. In just the past two years, an electromagnetic (EM) counterpart was detected for a gravitational wave event, and evidence for an EM counterpart of high energy neutrinos has been identified. These measurements have had a major impact on our view of the non-thermal universe, but understanding cosmic accelerators require a substantial increase in the number of multimessenger observations. The Astrophysical Multimessenger Observatory Network (AMON) is designed for high-statistics searches of sub-threshold transient alerts from gamma-ray and neutrino detectors. Within AMON, we have implemented a joint-likelihood analysis of TeV gamma-ray measurements from the High Altitude Water Cherenkov (HAWC) Observatory and neutrinos from the IceCube Neutrino Observatory. AMON is ready to produce real-time coincidence alerts using HAWC "hotspots" and IceCube astrophysical neutrino events. These alerts will be distributed to AMON follow-up partners with a median anticipated delay of six hours, which corresponds to a full transit in the field of view of HAWC. The alerts will have an angular resolution of ∼0.2 • , making them well-suited for deep electromagnetic follow-up observations.

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High-energy gamma rays and neutrinos from nearby radio galaxies

Cited by 15 publications

References 149 publications

Novel gamma-ray signatures of PeV-scale dark matter

Novel gamma-ray signatures of PeV-scale dark matter

On the Detection Potential of Blazar Flares for Current Neutrino Telescopes

AMON: TeV Gamma and Neutrino Coincidence Alerts from HAWC and IceCube subthreshold data

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