Speaker
Description
Authors: A. Dominguez, L. Tibaldo, M. Ajello, M. Lemoine-Goumard for the
Fermi-LAT collaboration and L. Saha, S. Marchesi, M. Lopez
Abstract: The identification of major contributors to the observed
Cosmic Rays (CRs) is a prime objective to resolve this 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 is preventing any conclusion about the prevalence of SFRs as
CR sources. In this talk, we present a detailed morphological and
spectral study of a 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, which makes it one of the few studies of gamma rays from SFRs. Our
analysis allows us to derive physical properties of the region, and
helps in the understanding of the emission mechanisms and nature of this
source class. These are the first steps towards potentially establishing
SFRs as fundamental CR emitters.
