High resolution radio study of the Pulsar Wind Nebula within the Supernova Remnant G0.9+0.1

Abstract

We have conducted a radio study at 3.6, 6 and 20 cm using ATCA and VLA and reprocessed XMM-Newton and Chandra data of the pulsar wind nebula (PWN) in the supernova remnant (SNR) G0.9+0.1. The new observations revealed that the morphology and symmetry suggested by Chandra observations (torus and jet-like features) are basically preserved in the radio range in spite of the rich structure observed in the radio emission of this PWN, including several arcs, bright knots, extensions and filaments. The reprocessed X-ray images show for the first time that the X-ray plasma fills almost the same volume as the radio PWN. Notably the X-ray maximum does not coincide with the radio maximum and the neutron star candidate CXOU J174722.8-280915 lies within a small depression in the radio emission. From the new radio data we have refined the flux density estimates, obtaining S(PWN) ~ 1.57 Jy, almost constant between 3.6 and 20 cm. For the whole SNR (compact core and shell), a flux density S(at 20 cm)= 11.5 Jy was estimated. Based on the new and the existing 90 cm flux density estimates, we derived alpha(PWN)=-0.18+/-0.04 and alpha(shell)=-0.68+/- 0.07. From the combination of the radio data with X-ray data, a spectral break is found near nu ~ 2.4 x 10^(12) Hz. The total radio PWN luminosity is L(radio)=1.2 x 10^(35) erg s^(-1) when a distance of 8.5 kpc is adopted. By assuming equipartition between particle and magnetic energies, we estimate a nebular magnetic field B = 56 muG. The associated particle energy turns out to be U(part)=5 x 10^(47) erg and the magnetic energy U(mag)=2 x 10^(47) erg. Based on an empirical relation between X-ray luminosity and pulsar energy loss rate, and the comparison with the calculated total energy, a lower limit of 1100 yr is derived for the age of this PWN.

10 pages,8 figures, accepted for publication in A&A, June 13 2008

References in corpus (11)

• Discovery of Spatial and Spectral Structure in the X-Ray Emission from the Crab Nebula
• The Vela Pulsar and its Synchrotron Nebula
• Re-examining the X-Ray versus Spin-Down Luminosity Correlation of Rotation Powered Pulsars
• New Catalogs of Compact Radio Sources in the Galactic Plane
• Very high energy gamma rays from the composite SNR G0.9+0.1
• PSR J1833-1034: Discovery of the Central Young Pulsar in the Supernova Remnant G21.5-0.9
• High-Resolution, Wide-Field Imaging of the Galactic Center Region at 330 MHz
• The X-ray Structure and Spectrum of the Pulsar Wind Nebula Surrounding PSR B1853+01 in W44
• The Pulsar Wind Nebula in G11.2-0.3
• XMM-Newton spectral analysis of the Pulsar Wind Nebula within the composite SNR G0.9+0.1
• Chandra observations of the pulsar wind nebula in SNR G0.9+0.1

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• Multiband Emission from Pulsar Wind Nebulae: A Possible Injection Spectrum
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• The Radio Properties and Magnetic Field Configuration in the Crab-like Pulsar Wind Nebula G54.1+0.3
• Spatially resolved X-ray spectroscopy and modeling of the nonthermal emission of the PWN in G0.9+0.1
• On the broad-band synchrotron spectra of pulsar wind nebulae
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• Constraining Models of the Pulsar Wind Nebula in SNR G0.9+0.1 via Simulation of its Detection Properties using the Cherenkov Telescope Array
• Exploiting Morphological Data from Pulsar Wind Nebulae via a Spatio-Temporal Leptonic Transport Code
• A VLA Study of Newly-Discovered Southern Latitude Non-Thermal Filaments in the Galactic Center: Radio Continuum Total-intensity and Spectral Index Properties
• Maximally-hard spectra from diffusive shock-acceleration in pulsar-wind nebulae
• HESS J1943+213: a non-classical high-frequency-peaked BL Lac object
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• High Energy Emission from the Galactic Center
• New Hard X-Ray and Multiwavelength Study of the PeVatron Candidate PWN G0.9+0.1 in the Galactic Center Region