Possible supernova remnant associated with pulsar PSR 1930+22

Details Possible supernova remnant associated with pulsar PSR 1930+22 Possible supernova remnant associated with pulsar PSR 1930+22

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123l...5g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 2, July 1983, p. L5-L7.

Astronomy and Astrophysics

Astronomy

7

Pulsars, Radio Sources (Astronomy), Supernova Remnants, Astronomical Maps, Distance, Radiant Flux Density, Radio Spectra, Stellar Evolution

Scientific paper

An extended radio source near pulsar PSR 1930+22 has been detected. Integrated flux densities of 2.27 + or - 0.2 Jy at 1420 MHz and of 2.02 + or - 0.2 Jy at 2295 MHz are obtained, implying a spectral index -0.24 + or - 0.35. Considering this radio source as a supernova remnant, a distance of about 5.5 kpc and an age of about 40,000 years are deduced from the Milne's (1979) 1 GHz surface brightness-diameter calibration. These values agree very well with the distance of about 6.5 kpc inferred for PSR 1930+22 from its dispersion measure and with its characteristic age of 39,000 years. These facts indicate that this source (G57.1+1.7) may be a supernova remnant associated with the pulsar.

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