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 = 0.25-0.10-0.05. 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.
- Pulsars: individual (PSR J1811-1925)
- Radio continuum: ISM
- Supernova remnants
- Supernovae: individual (G11.2-0.3)
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science