Global O VI line emission from the Cygnus Loop supernova remnant and direct kinematic measurement of the associated shock

Details Global O VI line emission from the Cygnus Loop supernova remnant and direct kinematic measurement of the associated shock Global O VI line emission from the Cygnus Loop supernova remnant and direct kinematic measurement of the associated shock

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396l.103r&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 396, no. 2, Sept. 10, 1992, p. L103-L106.

Astronomy and Astrophysics

Astrophysics

16

Line Spectra, Oxygen Spectra, Shock Waves, Supernova Remnants, Cygnus Constellation, Far Ultraviolet Radiation, Interstellar Matter, Spectrophotometry, Stellar Spectra

Scientific paper

A far-ultraviolet spectrophotometric emission-line mapping of the Cygnus Loop supernova remnant is presented. These are results from the first flight of the rocket-borne, High Resolution Emission Line Spectrometer. The spatial distribution of the emission is that of a limb-brightened shell, and similar to soft X-ray maps. The emission-line profiles, which are broader than the instrument resolution, were consistent with uniformly expanding shell models. Best-fit values give a radial expansion velocity to the emissive region of 185(+/-19) km/s and a reddening-corrected average surface brightness of 8.8(+/-3.6) x 10 exp -6 ergs/sq cm s sr in the doublet. Comparison of the observed brightness with predictions of both radiative and nonradiative shock models provides constraints for the global blast wave ram pressure as well as a "covering factor" of the intermediate velocity shock.

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