Discovery of 35 New Supernova Remnants in the Inner Galaxy

By C. Brogan, J. Gelfand, B. Gaensler, N. Kassim, T. Lazio. 2006

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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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6c0d48b5c390e262d5439a3d215e55b33cb619ed

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Citations in the corpus

Galactic electrons and positrons at the Earth: new estimate of the primary and secondary fluxes (2010, background): “Note, however, that Brogan et al. (2006) reported the detection of 35 new remnants in the inner Galaxy, and suggest that former radial distribution estimations should be revised.”
THE WISE CATALOG OF GALACTIC H ii REGIONS (2013, background): “…known H ii region that is included in the catalog; “Probable PN”: the object has compact MIR emission with no nebulosity; “No radio”: no discrete radio continuum source at the observed position. c Brogan et al. (2006). d Helfand et al. (2006). e Clark et al. (2003). f Gaensler et al. (1999). used.”
Science with the Murchison Widefield Array (2012, background): “Most notable has been the survey of Brogan et al. (2006), shown in Fig.7, which tripled the number of known SNRs in a 40 deg2 patch of the Galactic plane.”
THE FIRST FERMI LAT SUPERNOVA REMNANT CATALOG (2015, background): “7−0.0: Identified in the radio by Brogan et al. (2006), this remnant is known to be interacting with a nearby dense cloud due to the presence of OH (1720 MHz) masers (Hewitt & Yusef-Zadeh 2009).”