VLA observations of candidate supernova remnants from the Clark Lake 30.9 MHz Galactic plane survey

Abstract

view Abstract Citations (3) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS VLA Observations of Candidate Supernova Remnants From the Clark Lake 30.9 MHz Galactic Plane Survey Gorham, P. W. ; Kulkarni, S. R. ; Prince, T. A. Abstract We report the results of 1464 MHz continuum VLA observations of eight fields containing unidentified small-diameter objects associated with candidate supernova remnants from the Clark Lake 30.9 MHz galactic plane survey. The observations were made in the C configuration giving a resolution of ~12-20 arcsec, and a sensitivity of typically < 0.5 mJy per beam. Polarization measurements were made as well. One of the 30.9 MHz candidates, G41.4+ 1.2, appears to be confirmed as a supernova remnant by our observations. Of the remaining seven fields observed, three were found to contain small-diameter objects which met some of the criteria for nonthermal origin, but will require further study to evaluate whether they are associated with the candidate supernova remnants. Two of the fields were found to contain groups of unresolved objects consistent with expectations for extragalactic background sources. In these cases the 30.9 MHz observations, which could not resolve the individual sources but would view them as a single extended source, may have mistakenly identified them as remnants. Finally, two fields contained bright H II regions. Publication: The Astronomical Journal Pub Date: January 1993 DOI: 10.1086/116428 Bibcode: 1993AJ....105..314G Keywords: Extragalactic Radio Sources; H Ii Regions; Sky Surveys (Astronomy); Supernova Remnants; Very Large Array (Vla); Galactic Structure; Linear Polarization; Massive Stars; Stellar Evolution; Astrophysics; SUPERNOVA REMNANTS full text sources ADS | data products SIMBAD (20) NED (12)