Discovery of 35 new supernova remnants in the inner galaxy

We report the discovery of up to 35 new supernova remnants (SNRs) from a 42'' resolution, 90 cm multiconfiguration Very Large Array survey of the Galactic plane covering 4.degrees 5 < l < 22.degrees 0 and vertical bar b vertical bar < 1.degrees 25. Archival 20 cm, 11 cm, and 8 mm data have also been used to identify the SNRs and constrain their properties. The 90 cm image is sensitive to SNRs with diameters 2.'5 to 50' and down to a surface brightness limit of similar to 10(-21) W m(-2) Hz(-1) sr(-1). This survey has nearly tripled the number of SNRs known in this part of the Galaxy and represents an overall 15% increase in the total number of Galactic SNRs. These results suggest that further deep, low-frequency surveys of the inner Galaxy will resolve the discrepancy between the expected number of Galactic SNRs and the significantly smaller number of currently known SNRs.