Other
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53.1189l&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, Nov.-Dec. 1976, p. 1189-1195. In Russian.
Other
H Alpha Line, Interstellar Gas, Shock Wave Interaction, Stellar Evolution, Supernova Remnants, Astronomical Models, Fabry-Perot Interferometers, Image Converters, Nebulae, Shock Fronts, Shock Wave Propagation
Scientific paper
Shock-wave interaction with inhomogeneities in the interstellar medium is investigated as a possible formation mechanism for optical filaments in old supernova remnants. The integral brightness distribution and intrinsic velocity dispersions in filaments of the remnants Simeiz 147 and VRO 42.05.01 are analyzed in order to verify this theory observationally, using H-alpha observations conducted with a high-contrast Fabry-Perot interferometer and a contact image converter. The velocity of a luminescent shock wave propagating within the nebula is estimated to be 40 to 100 km/s for both remnants, and it is shown that the surface brightness of a secondary H-alpha shock wave does not depend on propagation rate. Other possible sources of the filamentary emission are considered.
Ivanova N. P.
Lozinskaia T. A.
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