Discovery of GeV gamma-ray emission from PWN Kes 75 and PSR J1846-0258

Abstract

We report the detection of gamma-ray emission from PWN Kes 75 and PSR J1846-0258. Through modeling the spectral energy distribution incorporating the new Fermi-LAT data, we find the the observed gamma-ray emission is likely a combination of both the PWN and pulsar magnetosphere. The spectral shape of this magnetospheric emission is similar to the gamma-ray spectrum of rotation powered pulsars detected by Fermi-LAT and the results from our best-fit model suggest the pulsar's magnetospheric emission accounts for 1% of the current spin-down luminosity. Prior works attempted to characterize the properties of this system and found a low supernova explosion energy and low SN ejecta mass. We re-analyze the broadband emission incorporating the new Fermi emission and compare the implications of our results to prior reports. The best-fit gamma-ray emission model suggests a second very hot photon field possibly generated by the stellar wind of a Wolf-Rayet star embedded within the nebula, which supports the low ejecta mass found for the progenitor in prior reports and here in the scenario of binary mass transfer.

Accepted for publication in ApJ. 10 pages, 5 figures, 2 tables

References in corpus (14)

• Incremental Fermi Large Area Telescope Fourth Source Catalog
• Magnetar-like Emission from the Young Pulsar in Kes 75
• On Pulsar Distance Measurements and their Uncertainties
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• The Distance of the SNR Kes 75 and PWN PSR J1846-0258 System
• Deep Chandra Observation of the Pulsar Wind Nebula Powered by the Pulsar J1846-0258 in the Supernova Remnant Kes 75
• NuSTAR Discovery of a Young, Energetic Pulsar Associated with the Luminous Gamma-ray Source HESS J1640-465
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• The Nonstandard Properties of a "Standard" PWN: Unveiling the Mysteries of PWN G21.5-0.9 Using its IR and X-ray emission
• X-ray Spectroscopy of the Highly Magnetized Pulsar PSR J1846-0258, its Wind Nebula and Hosting Supernova Remnant Kes 75
• Probing the Innermost Ejecta Layers in SNR Kes 75: Implications for the Supernova Progenitor
• Reactivation of the high-magnetic field pulsar PSR J1846--0258 with magnetar-like bursts
• The Physical Parameters of Four WC-type Wolf-Rayet Stars in the Large Magellanic Cloud: Evidence of Evolution

Cited by in corpus (5)

• Searching for Magnetar Binaries Disrupted by Core-Collapse Supernovae
• Broadband X-ray Spectroscopy of the Pulsar Wind Nebula in HESS J1640-465
• Fermi-LAT Gamma-ray Emission Discovered from the Composite Supernova Remnant B0453-685 in the Large Magellanic Cloud
• Spatio-spectral-temporal Modelling of Two Young Pulsar Wind Nebulae
• NuSTAR and XMM-Newton Observations of PSR J1930+1852 and Its Pulsar Wind Nebula