Shock Wave Emission at Miller's Position 1 in the Cygnus Loop

Details Shock Wave Emission at Miller's Position 1 in the Cygnus Loop Shock Wave Emission at Miller's Position 1 in the Cygnus Loop

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...560..763r&link_type=abstract

The Astrophysical Journal, Volume 560, Issue 2, pp. 763-771.

Astronomy and Astrophysics

Astronomy

6

Ism: Individual: Name: Cygnus Loop, Shock Waves, Ism: Supernova Remnants, Ultraviolet: Ism

Scientific paper

We present the far-UV spectrum (900-1800 Å) of the bright filament known as Miller's (1974) position 1 in the Cygnus Loop obtained with the Hopkins Ultraviolet Telescope during the Astro-2 space shuttle mission. Longer wavelength IUE and ground-based spectra of adjoining regions were scaled to produce a combined spectrum ranging from 900 to 7500 Å. We compare this spectrum with models of radiative shock waves to infer shock velocities and elemental abundances. A power-law distribution of shock velocities within the spectrograph apertures can reproduce the observed spectrum. We consider the question of whether a simpler shock structure, thermally unstable cooling, or a mixing layer could produce a similar spectrum. We also discuss the elemental abundances with particular attention to C and Si, whose lines are only available in the UV.

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