A broadband X-ray study of the Rabbit pulsar wind nebula powered by PSR J1418-6058

Abstract

We report on broadband X-ray properties of the Rabbit pulsar wind nebula (PWN) associated with the pulsar PSR J1418-6058 using archival Chandra and XMM-Newton data, and a new NuSTAR observation. NuSTAR data above 10 keV allowed us to detect the 110-ms spin period of the pulsar, characterize its hard X-ray pulse profile, and resolve hard X-ray emission from the PWN after removing contamination from the pulsar and other overlapping point sources. The extended PWN was detected up to $\sim$20 keV and is well described by a power-law model with a photon index $\Gamma \approx$2. The PWN shape does not vary significantly with energy, and its X-ray spectrum shows no clear evidence of softening away from the pulsar. We modeled the spatial profile of X-ray spectra and broadband spectral energy distribution in the radio to TeV band to infer the physical properties of the PWN. We found that a model with low magnetic field strength ($B\sim 10$ $\mu$G) and efficient diffusion ($D\sim 10^{27}$ cm${}^2$ s${}^{-1}$) fits the PWN data well. The extended hard X-ray and TeV emission, associated respectively with synchrotron radiation and inverse Compton scattering by relativistic electrons, suggests that particles are accelerated to very high energies ($\gtrsim 500$ TeV), indicating that the Rabbit PWN is a Galactic PeVatron candidate.

21 pages, 10 figures. ApJ accepted

References in corpus (12)

• Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
• Synchrotron Self-Compton Analysis of TeV X-ray Selected BL Lacertae Objects
• NuSTAR Observations of the Bullet Cluster: Constraints on Inverse Compton Emission
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• Pulsar Wind Nebulae Created by Fast-Moving Pulsars
• NuSTAR study of Hard X-Ray Morphology and Spectroscopy of PWN G21.5-0.9
• Evolution of a Pulsar Wind Nebula within a Composite Supernova Remnant
• H.E.S.S. and Suzaku observations of the Vela X pulsar wind nebula
• Modeling the γ-ray Pulsar Wind Nebulae population in our Galaxy
• High-Energy X-ray Imaging of the Pulsar Wind Nebula MSH~15-52: Constraints on Particle Acceleration and Transport
• In-flight PSF calibration of the NuSTAR hard X-ray optics
• {\it NuSTAR} hard X-ray studies of the pulsar wind nebula 3C~58

Cited by in corpus (1)

• New Hard X-Ray and Multiwavelength Study of the PeVatron Candidate PWN G0.9+0.1 in the Galactic Center Region