Observation of the $\gamma$-ray Emission from W43 with LHAASO

Abstract

In this paper, we report the detection of the very-high-energy (VHE, $100\mathrm{GeV}<E<100\mathrm{TeV}$) and ultra-high-energy (UHE, $E>100\mathrm{TeV}$) $\gamma$-ray emissions from the direction of the young star-forming region W43, observed by the Large High Altitude Air Shower Observation (LHAASO). The extended $\gamma$-ray source was detected with a significance of $\sim 16\sigma$ by KM2A and $\sim 17\sigma$ by WCDA, respectively. The angular extension of this $\gamma$-ray source is about 0.5 degrees, corresponding to a physical size of about 50 pc. We discuss the origin of the $\gamma$-ray emission and possible cosmic ray acceleration in the W43 region using multi-wavelength data. Our findings suggest that W43 is likely another young star cluster capable of accelerating cosmic rays (CRs) to at least several hundred TeV.

arXiv comment11 pages, 2 figures, and 3 tables. Accepted for publication in SCPMA

References in corpus (33)

• The ATNF Pulsar Catalogue
• Design Concepts for the Cherenkov Telescope Array
• Observations of the Crab Nebula with H.E.S.S
• Planck 2013 results. XI. All-sky model of thermal dust emission
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
• The H.E.S.S. Galactic plane survey
• A New $\Sigma -D$ Relation and Its Application to the Galactic Supernova Remnant Distribution
• Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies
• Observation of the Crab Nebula with the HAWC Gamma-Ray Observatory
• A revised catalogue of 294 Galactic supernova remnants
• The First LHAASO Catalog of Gamma-Ray Sources
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) I: Project Overview and Initial Results
• From Massive Protostars to a Giant HII Region: Submillimeter Imaging of the Galactic Mini-starburst W43
• Simple analytical approximations for treatment of inverse Compton scattering of relativistic electrons in the black-body radiation field
• A radiation transfer model for the Milky-Way: I. Radiation fields and application to High Energy Astrophysics
• The observation of the Crab Nebula with LHAASO-KM2A for the performance study
• W43: the closest molecular complex of the Galactic Bar?
• Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A
• The Parallax of W43: a Massive Star Forming Complex near the Galactic Bar
• Constraints on the Galactic Population of TEV Pulsar Wind Nebulae Using Fermi Large Area Telescope Observations
• Cosmic ray transport in starburst galaxies
• An Ultrahigh-energy $\gamma$-ray Bubble Powered by a Super PeVatron
• Gamma-ray halos around pulsars as the key to understanding cosmic ray transport in the Galaxy
• Cosmic ray production in superbubbles
• The HI/OH/Recombination line survey of the inner Milky Way (THOR): data release 2 and HI overview
• Tests of Statistical Significance and Background Estimation in Gamma Ray Air Shower Experiments
• ASTRI Mini-Array Core Science at the Observatorio del Teide
• Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5
• Discovery of a New Low-Latitude Milky Way Globular Cluster using GLIMPSE
• The diffuse gamma-ray emission toward the Galactic mini starburst W43
• Recombining Plasma in the Gamma-ray Emitting Mixed-Morphology Supernova Remnant 3C 391
• Prospects for a Multi-TeV Gamma-ray Sky Survey with the LHAASO Water Cherenkov Detector Array

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• How interacting winds shape the mechanical feedback of massive star clusters over millions of years
• Young Massive Star Clusters as TeV Emitters: Constraints from H.E.S.S. and LHAASO