Optical spectrum of the unusual supernova remnant G109.1-1.0

Details Optical spectrum of the unusual supernova remnant G109.1-1.0 Optical spectrum of the unusual supernova remnant G109.1-1.0

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.291..132b&link_type=abstract

Nature, vol. 291, May 14, 1981, p. 132, 133.

Astronomy and Astrophysics

Astronomy

11

Astronomical Spectroscopy, Optical Properties, Radio Sources (Astronomy), Supernova Remnants, X Ray Sources, H Alpha Line, Spectral Line Width

Scientific paper

The new supernova remnant G109.1-1.0 has important X-ray and radio parallels to the SS433-W50 pair. A spectrum of the faint optical filaments associated with the large shell-like radio source has been obtained. The spectrum shows strong forbidden S II 6,717, 6,731 A emission relative to H-alpha, which is characteristic of shock-heated gas, and confirms that the filaments are part of the supernova remnant. By assuming pressure equilibrium between the optical filaments and the interior of the remnant, an initial energy of 3 x 10 to the 51st erg is found, which is higher than that found from X-ray measurements. When compared with W50, the G109.1-1.0 remnant has filaments of higher density, and weaker forbidden N II emission.

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