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Title:
G 292.0 + 1.8 - Evidence for a pseudo-Crab stage in SNR evolution
Authors:
Braun, R.; Goss, W. M.; Caswell, J. L.; Roger, R. S.
Affiliation:
AA(Leiden, Rijksuniversiteit, Sterrewacht, Netherlands), AB(Groningen, Rijksuniversiteit, Netherlands), AC(CSIRO, Div. of Radiophysics, Epping, Australia), AD(Dominion Radio Astrophysical Observatory, Penticton, Canada)
Publication:
Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 259-264. ZWO-supported research. (A&A Homepage)
Publication Date:
07/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COSMIC DUST, RADIO SOURCES (ASTRONOMY), STELLAR EVOLUTION, SUPERNOVA REMNANTS, ASTRONOMICAL MAPS, BRIGHTNESS DISTRIBUTION, CRAB NEBULA, EJECTA, SOUTHERN SKY
Bibliographic Code:
1986A&A...162..259B

Abstract

New observations of the young type II supernova remnant (SNR) G 292.0+1.8 have been made at 843 MHz with 0arcmin.8 resolution using the Molonglo Observatory Synthesis Telescope and at 12, 25, 60, and 100 μm with IRAS. All of the available structural and kinematic data suggests that the southwest portion of the SNR is encountering the periphery of a cloud (where n = 0.4 cm-3) while the northeast portion is expanding into low density intercloud gas (n < 0.003 cm-3). A relatively small mass (<1 M_sun;) of high velocity ejecta seems responsible for the blast wave. A significant mass of slower ejecta is now encountering the reverse shock in the southwest, giving rise to a center-filled morphology. Such a pseudo-Crab phase may be a common occurrence in type II SNR of intermediate age.

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