July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

On the origin of the very-high energy gamma-ray emission of the Galactic Center region

Aug 4, 2015, 2:15 PM
15m
Amazon (World Forum)

Amazon

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-EX Parallel GA16 H.E.S.S.

Speaker

Aion Viana (MAX-PLANCK-INSTITUT FÜR KERNPHYSIK)

Description

The Galactic Centre region has been observed by the H.E.S.S. I array of ground-based Cherenkov telescopes since 2004 leading to the detection of the very-high-energy (VHE, E > 100 GeV) gamma-ray source HESS J1745-290 spatially coincident with the supermassive black hole Sgr A*. Diffuse TeV gamma-ray emission has been detected along the Galactic ridge, most likely due to cosmic-ray interactions with dense gas of the Central Molecular Zone. We report here the results of a detailed spectral study of the inner 50 pc of the Galactic Centre region based on the full data set of 2004-2013 observations. The new results allow us to make a strong statement regarding the location and origin of the accelerator of the parent ultrarelativistic particles. We will discuss possible implications of the observed emission, in particular, in the context of the origin of Galactic cosmic-rays.
Collaboration H.E.S.S.
Registration number following "ICRC2015-I/" 965

Primary author

Aion Viana (MAX-PLANCK-INSTITUT FÜR KERNPHYSIK)

Co-authors

Dr Aion Gabici (APC/Universite ́ Paris Diderot) Dr Emmanuel Moulin (CEA-Saclay/IRFU) Prof. Felix Aharonian (MPIK/Dublin Institute for Advanced Studies/National Academy of Sciences of the Republic of Armenia)

Presentation materials

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