Australia Telescope Observations of the CTB 33 Complex
Abstract
We present high-resolution radio continuum, H I absorption, and H90α recombination line observations of the CTB 33 complex and nearby sources (l = 337°, b = 0°) taken with the Australia Telescope Compact Array. We estimate distances to several discrete sources on the basis of H I absorption spectra. Radio recombination lines are detected for two sources in the field. The compact source G337.0-0.1 in the CTB 33 complex, whose nature was previously in doubt, is identified as a supernova remnant with a diameter of ~5 pc. This classification is based on several contributing features: a nonthermal spectral index (-0.6), a shell structure, and the absence of detectable recombination lines. In addition, a 1720 MHz OH maser is probably associated with G337.0-0.1. We conclude that the CTB 33 region is a supernova remnant-H II complex at a distance of ~11 kpc.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1997
- DOI:
- 10.1086/304246
- Bibcode:
- 1997ApJ...483..335S
- Keywords:
-
- ISM: H II Regions;
- ISM: Individual: Alphanumeric: CTB 33;
- Radio Continuum: ISM;
- Radio Lines: ISM;
- ISM: Supernova Remnants