Spectral Components of the Radio Composite Supernova Remnant G11.2-0.3
Abstract
We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival Very Large Array 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 αP=0.25+0.05-0.10. We observe a spectral index of αS=0.56+/-0.02 throughout most of the SNR shell region but also detect a gradient in α in the southeastern 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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2002
- DOI:
- 10.1086/340229
- arXiv:
- arXiv:astro-ph/0202262
- Bibcode:
- 2002ApJ...572..202T
- Keywords:
-
- Stars: Pulsars: Individual: Alphanumeric: PSR 1811-1925;
- Radio Continuum: ISM;
- Stars: Supernovae: Individual: Alphanumeric: G11.2-0.3;
- ISM: Supernova Remnants;
- Astrophysics
- E-Print:
- 9 pages, 5 figures, Accepted to the Astrophysical Journal