Multiwavelength Investigation of $\gamma$-ray Source MGRO J1908+06 Emission Using Fermi-LAT, VERITAS, and HAWC

Abstract

This paper investigates the origin of the $\gamma$-ray emission from MGRO J1908+06 in the GeV-TeV energy band. By analyzing the data collected by {\it Fermi}-LAT, VERITAS, and HAWC, with the addition of spectral data previously reported by LHAASO, a multiwavelength (MW) study of the morphological and spectral features of MGRO J1908+06 provides insight into the origin of the $\gamma$-ray emission. The mechanism behind the bright TeV emission is studied by constraining the magnetic field strength, the source age and the distance through detailed broadband modeling. Both spectral shape and energy-dependent morphology support the scenario that inverse-Compton (IC) emission of an evolved pulsar wind nebula (PWN) associated with PSR J1907+0602 is responsible for the MGRO J1908+06 $\gamma$-ray emission with a best-fit true age of $T=22\pm 9$ kyr and a magnetic field of $B=5.4\pm 0.8\mu \mathrm{G}$, assuming the distance to the pulsar $d_{\mathrm{PSR}}=3.2$ kpc.

21 pages, 11 figures, submitted to The Astrophysical Journal

References in corpus (9)

• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
• TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• High-Energy Gamma Rays from the Milky Way: Three-Dimensional Spatial Models for the Cosmic-Ray and Radiation Field Densities in the Interstellar Medium
• A Cosmic Ray Positron Anisotropy due to Two Middle-Aged, Nearby Pulsars?
• Investigating the TeV Morphology of MGRO J1908+06 with VERITAS
• Timing of 29 Pulsars Discovered in the PALFA Survey
• Radio study of the extended TeV source VER J1907+062

Cited by in corpus (1)

• Investigation of the Microquasar SS 433 with VERITAS