12-20 July 2017
BEXCO
Asia/Seoul timezone
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Contribution

BEXCO - Room E(106/107)

[GA178] Correlated GeV-TeV Gamma-Ray Emission from Extended Sources in the Cygnus Region

Speakers

  • Binita HONA

Primary authors

Co-authors

Description

The Cygnus arm of our galaxy is a source-rich and complex region hosting multiple gamma-ray source types such as pulsar wind nebulae(PWN), supernova remnants, binary systems, and star clusters. The High Altitude Water Cherenkov(HAWC) observatory has been collecting data continuously since 2014, and has reported five sources within the Cygnus region. Several other instruments have also observed gamma-ray sources in this region. For instance, Fermi-LAT found gamma-ray emission at GeV energies due to a “Cocoon” of freshly accelerated cosmic rays, which is co-located with a known PWN seen by several TeV gamma-ray observatories (TeV J2032+4130, MGRO J2031+41, ARGO J2031+4157, and 2HWC J2031+415). TeV J2032+4130 is likely powered by the pulsar PSR J2032+4157 based on the multi-wavelength observation and asymmetric morphology reported by VERITAS. The study of HAWC data will provide more information regarding the morphology, emission origin, and the correlation with the GeV emission if any. This presentation will discuss a likelihood method that combines data collected with the HAWC instrument and the Fermi-LAT and the results obtained to provide a deeper understanding of the Cygnus region across five decades of energy range.