The Blazar 3C 66A in 2003-2004: hadronic versus leptonic model fits

Reimer, A.; Joshi, M. N.; Böttcher, M.

doi:10.1063/1.3076718

Cited by 8 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The jet model fitting to the observed SED and optical variability patterns of 3C 66A usually gives δ ∼ 30 and f γ ≈ 1 [82,95,96]. In the leptonic models, a pure SSC model would require a tiny equipartition ratio ǫ Be ∼ 10 −3 , while in the EC+SSC models ǫ Be would be rather larger ∼ 0.1 [82,95].…”

Section: Alp Interpretation Of the Possible Cp Observationmentioning

confidence: 99%

Optical circular polarization induced by axion-like particles in blazars

Yao¹,

Bi²,

Wang³

et al. 2022

Preprint

View full text Add to dashboard Cite

We propose that the interaction between the axion-like particles (ALPs) and photons can be a possible origin of the optical circular polarization (CP) in blazars. The non-detection of the optical CP at the level of 0.1% can be used to place a constraint on the ALP-photon coupling gaγ • BT0 7.9 × 10 −12 G • GeV −1 for ma 10 −13 eV, which depends on the magnetic field model of the blazar jet. This constraint would be stringent for the blazar models with a large magnetic field strength, such as hadronic radiation models. We also perform an analysis for the possible observations of the optical CP in two blazars, and find that they could be explained by the ALPphoton coupling of O(10 −12 ) GeV −1 . As an outlook, our analysis can be improved by further researches on the radiation models of blazars and high-precision simultaneous measurements of the optical linear polarization and CP.

show abstract

Section: Alp Interpretation Of the Possible Cp Observationmentioning

confidence: 99%

Optical circular polarization induced by axion-like particles in blazars

Yao¹,

Bi²,

Wang³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Because of the higher photomeson production losses the injected proton spectrum is expected to cut off earlier, as does the corresponding gamma-ray spectrum, in comparison to the case of very low photon densities. Examples may be the IBL 3C 66A where the high energy radiation is found to be dominated by a heavily reprocesses proton synchrotron component [29], and the LBL BL Lacertae where pion production losses are found to dominate over proton synchrotron losses with a resulting dominance of strongly reprocessed µ/π-synchrotron radiation at X-to gamma-rays [11]. CTA will allow to probe the precise cutoff energy and its possible relation to the AGN subclass of a large sample with high confidence.…”

Section: Hadronic Blazar Modeling Along the Sequence Hbl -Ibl -Lbl -Fsrqmentioning

confidence: 99%

Gamma-rays and Neutrinos from Hadronic Interactions in AGN Emission Models

Reimer¹

2012

Proceedings of AGN Physics in the CTA Era — PoS(AGN 2011)

View full text Add to dashboard Cite

The material of relativistic jets of active galactic nuclei is composed of leptons and hadrons. If a significant fraction of the overall jet power is converted into energizing protons to relativistic energies, along with the leptons, hadronic interactions play a role in converting particle energy into radiation and neutrino production. I will discuss the physics of hadronic blazar emission models with focus on photon and neutrino production, and compare in the gamma-ray range with the foreseen capabilities of the Cherenkov Telescope Array (CTA).

show abstract

“…[29][30][31][32] Powerful quasars with dense photon fields in the vicinity of their inner jet, such as 3C 279, may be promising neutrino targets. I will present here predictions of the neutrino emission during the February 23, 2006 flare of 3C 279.…”

Section: Example: 3c 279 In 2006mentioning

confidence: 99%

Hadron-Initiated Emission Processes in Blazar Jets

Reimer

2009

Int. J. Mod. Phys. D

View full text Add to dashboard Cite

Despite many advances in AGN physics, observationally as well as theoretically, the relativistic matter composition of extragalactic jets remains concealed. In contrast to the so called leptonic AGN emission models, hadronic models consider relativistic protons to be present in those sources, in addition to the relativistic electrons and positrons, and possibly cold material. Here I briefly discuss most processes that are commonly believed to characterize the so-called hadronic AGN emission models, and these include leptonic as well as hadronic processes. As an application predictions for the neutrino output during the TeV-flare of 3C 279 in 2006 are provided.

show abstract

The Blazar 3C 66A in 2003-2004: hadronic versus leptonic model fits

Cited by 8 publications

References 0 publications

Optical circular polarization induced by axion-like particles in blazars

Optical circular polarization induced by axion-like particles in blazars

Gamma-rays and Neutrinos from Hadronic Interactions in AGN Emission Models

Hadron-Initiated Emission Processes in Blazar Jets

Contact Info

Product

Resources

About