Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...318..370t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 318, July 1, 1987, p. 370-378.
Astronomy and Astrophysics
Astronomy
7
Charge Coupled Devices, Emission Spectra, Line Spectra, Shock Fronts, Supernova Remnants, X Ray Astronomy, Brightness Distribution, Iron, X Ray Imagery
Scientific paper
CCD images of the shock front at the eastern rim of Pup A, obtained in the forbidden lines of Fe X (6374 A) and Fe XIV (5303 A), are reported and compared to Einstein high-resolution-image soft X-ray data. The observed part of the remnant is complex, containing density irregularities. Optical and X-ray data are consistent in showing a nearly flat gradient of ionization temperature behind the shock. To determine conditions in the shock, scans of surface brightness across it in the optical lines were compared to surface brightnesses predicted by idealized Sedov models. It was not possible to match both the red and green line scans by a simple, single-component model, and the failure is ascribed to the presence of the density inhomogeneities. This result has important implications for the determination of SNR shock-front models by fitting X-ray data with Sedov models.
Petre Robert
Teske Richard G.
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