Radio Imaging of the Very-High-Energy Gamma-Ray Emission Region in the Central Engine of a Radio Galaxy

The H.E.S.S. Collaboration; the MAGIC Collaboration; the VERITAS collaboration; the VLBA 43 GHz M 87 Monitoring Team

arxiv: 0908.0511 · v1 · pith:EYDFLWP5new · submitted 2009-08-04 · 🌌 astro-ph.HE · astro-ph.GA

Radio Imaging of the Very-High-Energy Gamma-Ray Emission Region in the Central Engine of a Radio Galaxy

the VERITAS collaboration , the VLBA 43 GHz M 87 Monitoring Team , The H.E.S.S. Collaboration , the MAGIC Collaboration This is my paper

classification 🌌 astro-ph.HE astro-ph.GA

keywords radioemissiongamma-rayblackenergiesgalaxyholeparticles

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The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particles to energies exceeding 10^12 electron Volts (eV) and are bright sources of very-high-energy (VHE) gamma-ray emission, it is not yet known where the VHE emission originates. Here we report on radio and VHE observations of the radio galaxy M87, revealing a period of extremely strong VHE gamma-ray flares accompanied by a strong increase of the radio flux from its nucleus. These results imply that charged particles are accelerated to very high energies in the immediate vicinity of the black hole.

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