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Title:
Expanding shells in the filamentary edge of the young supernova remnant RCW 103
Authors:
Meaburn, J.; Allan, P. M.
Affiliation:
AA(Manchester, Victoria University, England), AB(Manchester, Victoria University, England)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 222, Oct. 1, 1986, p. 593-603. (MNRAS Homepage)
Publication Date:
10/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
STELLAR ENVELOPES, STELLAR EVOLUTION, STELLAR MASS EJECTION, STELLAR SPECTROPHOTOMETRY, SUPERNOVA REMNANTS, BOW WAVES, H ALPHA LINE, SHOCK WAVES, VELOCITY DISTRIBUTION
Bibliographic Code:
1986MNRAS.222..593M

Abstract

Long-slit, echelle spectrograms have been obtained of the Hα and [N II] lines over the young supernova remnant RCW 103. One notable velocity feature is a narrow velocity spike (≅20 km s-1 wide) with VHEL ≅ -44 km s-1 which is near the mean for the whole nebula. The overall velocity curves fail to match those expected from a remnant expanding radially at 1100 - 3000 km s-1 as suggested by previous observations. Along the filamentary edge of the SNR several regions of ⪉0.4 pc diameter are found which are expanding with velocities of up to 300 km s-1; these are explained in terms of a model involving bow shocks formed when the supernova blast-wave overruns pre-existing condensations. Other mechanisms are also suggested.

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