Spectral Components of the Radio Composite Supernova Remnant G11.2-0.3
Cindy Tam, Mallory S. E. Roberts, Victoria M. Kaspi
Abstract
We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival VLA data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only recently been distinguished through X-ray observations. Our results indicate that the spectral index of the pulsar wind nebula (PWN), or plerion, is alphaP ~ 0.25. We observe a spectral index of alphaS ~ 0.56 throughout most of the SNR shell region, but also detect a gradient in alpha in the south-eastern component. We compare the spectral index and flux density with recent single-dish radio data of the source. Also, the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems.
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