Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...314..203h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 314, March 1, 1987, p. 203-214.
Astronomy and Astrophysics
Astronomy
107
Nebulae, Neutron Stars, Pulsars, Radio Sources (Astronomy), Supernova Remnants, Optical Properties, Polarimetry, Radiant Flux Density, Radio Astronomy
Scientific paper
High-resolution, multifrequency maps of a bright extended radio source near the Galactic center have revealed it to be a classic example of a composite supernova remnant. A steep-spectrum shell of emission, about 8 arcmin in diameter, surrounds a flat-spectrum, highly polarized Crab-like core about 2 arcmin across. The two components have equal flux densities at about 6 cm, marking this source as having the highest core-to-shell ratio among the about 10 composite remnants identified to date. X-ray and far-infrared data on the source are used to constrain the energetics and evolutionary state of the remnant and its putative central pulsar. It is argued that the total energy contained in the Crab-like components requires that the pulsars powering them were all born with periods shorter than 50 ms, and that if a substantial number of neutron stars with slow initial rotation rates exist, their birthplaces have not yet been found.
Becker Robert H.
Helfand David J.
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