Abstract
view Abstract Citations (37) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A new optical supernova remnant in Cygnus. Gull, T. R. ; Kirshner, R. P. ; Parker, R. A. R. Abstract The letter reports the discovery of a filamentary emission-line structure at right ascension 19 hr 31 min and declination +31 deg 10 min (1950) during an emission-line survey of the Milky Way. This structure is classified as a supernova remnant on the basis of its similarity to several other SNRs, but is shown not to be part of the Gamma Cygni complex. A physical diameter of about 70 pc is obtained for this SNR along with a distance of approximately 1200 pc, a shock velocity of at least 50 km/s, an initial density of about 0.5 per cu cm, and an age of approximately 300,000 yr. Publication: The Astrophysical Journal Pub Date: July 1977 DOI: 10.1086/182480 Bibcode: 1977ApJ...215L..69G Keywords: Emission Spectra; Light Emission; Milky Way Galaxy; Supernova Remnants; Astronomical Spectroscopy; Galactic Radiation; Line Spectra; Nebulae; Astronomy full text sources ADS | data products SIMBAD (11)
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