Discovery of VHE gamma-ray emission from the direction of the globular cluster Terzan 5 - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Year : 2011

Discovery of VHE gamma-ray emission from the direction of the globular cluster Terzan 5

W. Domainko
  • Function : Author
A. -C. Clapson
  • Function : Author
F. Brun
P. Eger
  • Function : Author
M. Jamrozy
M. Dyrda
  • Function : Author
U. Schwanke

Abstract

Globular clusters are old stellar systems which exhibit very-high stellar densities in their cores. The globular cluster Terzan 5 is characterized by a high stellar encounter rate and hosts the largest detected population of millisecond pulsars. It also features bright GeV gamma-ray emission and extended X-ray radiation. However, no globular clusters have been detected in very-high-energy gamma rays (VHE, E> 100 GeV) so far. In order to investigate this possibility Terzan 5 has been observed with the H.E.S.S. telescope array in this energy band. The discovery of a source of VHE gamma rays from the direction of this globular cluster will be reported. The results of the VHE analysis and a multi-wavelength view of Terzan 5 will be presented in this contribution. No counterpart or model can fully explain the observed morphology of the detected VHE gamma-ray source.

Dates and versions

in2p3-00909708 , version 1 (26-11-2013)

Identifiers

  • HAL Id : in2p3-00909708 , version 1
  • ARXIV : 1112.4974

Cite

W. Domainko, A. -C. Clapson, F. Brun, P. Eger, M. Jamrozy, et al.. Discovery of VHE gamma-ray emission from the direction of the globular cluster Terzan 5. 32nd International Cosmic Ray Conference (ICRC2011), Aug 2011, Beijing, China. ⟨in2p3-00909708⟩
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