Hadronic origin of the TeV flare of M87 in April 2010

  title={Hadronic origin of the TeV flare of M87 in April 2010},
  author={Sarira Sahu and Eddie Palacios},
  journal={The European Physical Journal C},
M87 is a giant radio galaxy with FR-I morphology. It underwent three episodes of TeV flaring in recent years with the strongest one in April 2010 which was jointly monitored by MAGIC, VERITAS and H.E.S.S. We explain its spectral energy distribution in the energy range 0.3–5 TeV by assuming that the flaring occurs in the innermost region of the jet. In this region the low energy SSC photons serve as the target for the Fermi-accelerated high energy protons of energy $${\le }30$$≤30 TeV to form a… 

Mrk 421: The Multi-TeV emission and its astrophysical origin

The TeV blazar Markarian 421 underwent multi-TeV flaring during April 2004 and simultaneously observations in the X-ray and TeV energies were made. It was observed that the TeV outbursts had no

Multi-TeV flaring from blazars: Markarian 421 as a case study

The TeV blazar Markarian 421 underwent multi-TeV flaring during April 2004 and simultaneously observations in the X-ray and TeV energies were made. It was observed that the TeV outbursts had no

Photohadronic scenario in interpreting the February–March 2014 flare of 1ES 1011+496

The extraordinary multi-TeV flare from 1ES 1011+496 during February–March 2014 was observed by the MAGIC telescopes for 17 nights and the average spectrum of the whole period has a non-trivial shape.

The origin of multi-TeV flares from the nearest blazar Markarian 421

Markarian 421 is a high-peaked BL Lac object and it has undergone many strong outbursts since its discovery as a TeV source in 1992. Markarian 421 has been studied intensively and was observed by

A two-fluid model for black-hole accretion flows: Particle acceleration, outflows, and TeV emission

The multi-wavelength spectrum observed from M87 extends from radio wavelengths up to TeV gamma-ray energies. The radio through GeV components have been interpreted successfully using SSC models based


The very hard γ-ray spectrum from distant blazars challenges the traditional synchrotron self-Compton (SSC) model, which may indicate that there is a contribution from an additional high-energy


We report on 230 GHz (1.3 mm) very long baseline interferometry (VLBI) observations of M87 with the Event Horizon Telescope using antennas on Mauna Kea in Hawaii, Mt. Graham in Arizona, and Cedar

The nature of the intrinsic spectra from the VHE emission of H 2356-309 and 1ES 1101-232

The VHE emission from the HBLs H 2356-309 and 1ES 1101-232 were observed by the HESS telescopes during 2004–2007. Particularly the observations in 2004 from H 2356-309 and during 2004–2005 from 1ES

EBL effect on the observation of multi-TeV flaring of 2009 from Markarian 501

Markarian 501 is a high-peaked BL Lacertae object and has undergone many major outbursts since its discovery in 1996. As a part of the multiwavelength campaign, in the year 2009 this blazar was

Some possible sources of IceCube TeV–PeV neutrino events

The IceCube Collaboration has observed 37 neutrino events in the energy range $$30\,\mathrm{TeV}\le E_{\nu } \le 2$$30TeV≤Eν≤2 PeV and the sources of these neutrinos are unknown. Here we show that



Hadronic-origin orphan TeV flare from 1ES 1959+650

The 1ES 1959+650 is a high-peaked BL Lacertae object. On 4th of June, 2002, it exhibited a strong TeV flare without any low energy counterpart, providing for the first time an example of an orphan

Is the Core of M87 the Source of Its TeV Emission? Implications for Unified Schemes

M87 has recently been shown to be a TeV source that is likely to be variable. Based on this and on contemporaneous optical and X-ray monitoring, we argue that the source of the TeV emission is the

Superluminal Radio Features in the M87 Jet and the Site of Flaring TeV Gamma-Ray Emission

Superluminal motion is a common feature of radio jets in powerful γ-ray-emitting active galactic nuclei. Conventionally, the variable emission is assumed to originate near the central supermassive

Fast Variability of Tera–Electron Volt γ Rays from the Radio Galaxy M87

The observations confirm that TeV γ rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed toward the observer.

A synchrotron self-Compton scenario for the very high energy γ-ray emission of the radiogalaxy M 87. Unifying the TeV emission of blazars and other AGNs?

Context. M 87 is the first extragalactic source detected in the TeV range that is not a blazar. With the increasing performances of ground-based y Cerenkov telescopes, we can now probe the

Spine–sheath layer radiative interplay in subparsec‐scale jets and the TeV emission from M87

Simple one-zone homogeneous synchrotron self-Compton models have severe difficulties in explaining the TeV emission observed in the radio galaxy M87. Also, the site the TeV emission region is

Variable VHE gamma-ray emission from non-blazar AGNs

Context. The observation of rapidly variable very high energy (VHE) gamma-rays from non-aligned active galactic nuclei (AGNs), as reported from M 87, proves challenging for conventional theoretical

HUBBLE SPACE TELESCOPE Observations of Superluminal Motion in the M87 Jet

We present observations of the M87 jet made with the Faint Object Camera on board the Hubble Space Telescope at five epochs between 1994 and 1998. These observations reveal 10 superluminal features

Detection of TeV Gamma-Rays from the BL Lac 1ES 1959+650 in its low states and during a major outburst in 2002 ⋆

TeV γ-rays from the BL Lac object 1ES 1959+650 have been measured during the years 2000 and 2001 with a significance of 5.2 σ at a value of 5.3% of the Crab flux and in May 2002 during strong