Discovery of 35 new supernova remnants in the inner galaxy

C. L. Brogan, J. D. Gelfand, B. M. Gaensler, N. E. Kassim, T. J.W. Lazio

Research output: Contribution to journalArticlepeer-review

Abstract

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°.5 < l < 22°.0 and |b| < 1°.25. Archival 20 cm, 11 cm, and 8 μm 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 ∼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.

Original languageEnglish (US)
Pages (from-to)L25-L29
JournalAstrophysical Journal
Volume639
Issue number1 II
DOIs
StatePublished - Mar 1 2006

Keywords

  • Radio continuum: ISM
  • Supernova remnants
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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