Journal article
Interstellar scattering of compact radio sources near supernova remnants
The Astrophysical journal, Vol.301(1), pp.312-319
1986
DOI: 10.1086/163901
Abstract
A multifrequency VLBI search for interstellar scattering of extragalactic radio sources near supernova remnants is reported. VLBI observations at 610, 1663, and 4991 MHz were made of compact sources near the supernova remnants CTA 1, G33.6 + 0.1, G74.9 + 1.2, and HB 21, and 610 MHz observations were also made of a source near HB 9. These observations were motivated by the possibility of enhanced cosmic ray-induced turbulence in front of supernova remnants, as expected in 'diffusive' theories of shock wave acceleration. Angular broadening is definitely seen in the case of the source 2013 + 370, which lies within 4 arcmin of the supernova remnant G74.9 + 1.2. Present observations cannot unambiguously attribute the scattering material to the supernova remnant, as the line of sight also passes through the Cygnus OB1 association. The source 1849 + 005 appears to be highly scattered, as fringes were not detected even on short baselines at 5 GHz. This result may be due to the low galactic longitude of this source rather than its proximity to the supernova remnant G 33.6 + 0.1. Broadening was not detected for sources whose lines of sight pass close to the supernova remnants HB 9, HB 21, and CTA 1.
Details
- Title: Subtitle
- Interstellar scattering of compact radio sources near supernova remnants
- Creators
- S. R Spangler - University of IowaR. L Mutel - University of IowaJ. M Benson - National Radio Astronomy ObservatoryJ. M Cordes - Cornell University
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.301(1), pp.312-319
- DOI
- 10.1086/163901
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- University of Chicago Press
- Language
- English
- Date published
- 1986
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199955202771
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