Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.261..681a&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 261, no. 3, p. 681-693.
Astronomy and Astrophysics
Astronomy
8
Emission Spectra, H Alpha Line, Shock Wave Propagation, Supernova Remnants, Molecular Clouds, Plasma Bubbles, Stellar Evolution
Scientific paper
Numerical models for the time-dependent evolution of adiabatic SNRs in plane-stratified media are presented. These models approximate SNR evolution in the density distributions found near the edges of dense molecular clouds or diffuse stellar wind bubbles. Use of a simple T exp -1/2 cooling law enables cooling surfaces within the remnants to be identified and their H-alpha emission estimated. Projection of this emission onto the plane of the sky at a variety of angles of inclination, together with a consideration of the kinematics, allows comparisons with observed remnants to be made. It is found that the phenomenon of fast H-alpha emission, as observed in the Cygnus Loop and N49 and N63 in the LMC, can be easily explained as a consequence of SNR evolution in regions having high density contrasts.
Arthur Jane S.
Falle Sam A. E. G.
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