Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-02-13
Astronomy and Astrophysics
Astrophysics
9 pages, 5 figures, Accepted to the Astrophysical Journal
Scientific paper
10.1086/340229
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 alpha_P ~ 0.25. We observe a spectral index of alpha_S ~ 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.
Kaspi Victoria M.
Roberts Mallory S. E.
Tam Cindy
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