Star-forming regions as potential contributors to Galactic cosmic rays: the case of NGC 3603

Discussion timeslot (ZOOM-Meeting): 15. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/98542982538
ZOOM-Meeting ID: 98542982538
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/44-The-Origins-of-Galactic-Cosmic-Rays-GAD-GAI-CRD/125
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-04/5

Abstract:
'The identification of the sources contributing to the acceleration of Galactic Cosmic Rays (CRs) is a long-standing puzzle. Star-forming regions (SFRs) may be one of these potential contributors, in fact, the detection of gamma rays from the Cygnus Cocoon indicates the existence of freshly accelerated high-energy particles in the region, making it the first case of a firm detection of CR acceleration in SFRs. However, the limited number of such gamma-ray detections are preventing any conclusion about the prevalence of SFRs as CR sources. In this talk, we present a detailed morphological and spectral study of the unidentified source 4FGL J1115.1–6118 using about ten years of data above 10 GeV taken with Fermi-LAT. This source is positionally coincident with the young massive stellar cluster NGC 3603, and represents one of the few cases already studied in gamma rays. We will also present perspectives for a systematic search of gamma-ray emitting SFRs. These are the first steps towards potentially establishing these types of sources as fundamental CR emitters.'

Authors: Lab Saha
Co-Authors: Alberto Domínguez | Luigi Tibaldo | Marco Ajello | Marianne Lemoine-Goumard | on behalf of the Fermi-LAT collaboration
Collaboration: Ferrmi-LAT

Indico-ID: 216
Proceeding URL: https://pos.sissa.it/395/601