Jul 12 – 23, 2021
Europe/Berlin timezone

HAWC J2227+610: a potential PeVatron candidate for the CTA in the northern hemisphere

Jul 14, 2021, 12:00 PM
1h 30m


Talk GAI | Gamma Ray Indirect Discussion


Gaia Verna


Recent observations of VER J2227+608 and the associated supernova
remnant G106.3+2.7 by the High Altitude Water Cherenkov (HAWC)
observatory confirm the special interest of this source as a Galactic Pe-
Vatron candidate in the northern hemisphere. HAWC J2227+610 emits
VHE gamma-ray emission, above 100 TeV, from a region coincident with
molecular clouds and shows a hard energy spectrum without clear cutoff.
This has induced several authors to suggest or claim a potential hadronic
origin for its gamma-ray emission. CTA could play a crucial role to under-
stand the particle acceleration mechanisms behind this source thanks to
its improved sensitivity with respect to the present IACT generation. The
purpose of this work is to investigate the potentiality of CTA to observe
HAWC J2227+610 and to disentangle the different suggested scenarios
of hadronic and leptonic emission. In particular we study the capability
in resolving the morphology of this source and its eventual energy de-
pendence taking advantage of the unprecedent angular resolution. The
study is based on simulations; the CTA prototype science tool gammapy
is employed.


PeVatrons, CTA

Subcategory Future projects
Collaboration CTA

Primary author


Dr Franca Cassol (Aix Marseille Univ, CNRS/IN2P3, CPPM) Dr Heide Costantini (Aix Marseille Univ, CNRS/IN2P3, CPPM)

Presentation materials