CRESTAN, SilviaSilviaCRESTANGIULIANI, AndreaAndreaGIULIANIMEREGHETTI, SandroSandroMEREGHETTISIDOLI, LaraLaraSIDOLIPintore, FabioFabioPintoreLA PALOMBARA, NICOLANICOLALA PALOMBARA2025-02-142025-02-1420210035-8711http://hdl.handle.net/20.500.12386/35970The candidate PeVatron MGRO J1908+06, which shows a hard spectrum beyond 100 TeV, is one of the most peculiar γ-ray sources in the Galactic plane. Its complex morphology and some possible counterparts spatially related with the very high energy (VHE) emission region, preclude to distinguish between a hadronic and leptonic nature of the γ-ray emission. In this paper, we illustrate a new multiwavelength analysis of MGRO J1908+06, with the aim to shed light on its nature and the origin of its ultra-high-energy emission. We performed an analysis of the <SUP>12</SUP>CO and <SUP>13</SUP>CO molecular line emission demonstrating the presence of dense molecular clouds spatially correlated with the source region. We also analysed 12 yr of Fermi-Large Area Telescope (LAT) data between 10 GeV and 1 TeV finding a counterpart with a hard spectrum (Γ ~ 1.6). Our reanalysis of XMM-Newton data allowed us to put a more stringent constraint on the X-ray flux from this source. We demonstrate that a single accelerator cannot explain the whole set of multiwavelength data, regardless of whether it accelerates protons or electrons, but a two-zone model is needed to explain the emission from MGRO J1908+06. The VHE emission seems most likely the superposition of a TeV pulsar wind nebula powered by PSR J1907+0602, in the southern region, and of the interaction between the supernova remnant G40.5-0.5 and the molecular clouds, in the northern region.STAMPAenArticle10.1093/mnras/stab14222-s2.0-85113960997https://academic.oup.com/mnras/article/505/2/2309/62782002021MNRAS.505.2309CFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation