Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..494b&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 687, p. 494-500.
Astronomy and Astrophysics
Astronomy
5
Emission Spectra, Forbidden Transitions, Interstellar Matter, Supernova Remnants, Astronomical Spectroscopy, Hubble Space Telescope, Narrowband, Sulfur
Scientific paper
We present WF/PC narrow band forbidden S II 6725-wavelength images of two M33 supernova remnants obtained with the Wide Field/Planetary Camera on the HST. Comparison of these images with ground-based CCD data indicates that HST has resolved the nebular structures into shells or partial shells, permitting improved measurements of the diameters of these objects. Ground-based echelle spectra obtained at Kitt Peak with the 4-m telescope show profiles with half-width zero-intensity velocities of 163 and 275 km/sec for the two objects, indicating rapid bulk motions of the emitting filaments. The morphology of the emission seen in the WF/PC images allows the non-Gaussian shapes of the integrated echelle profiles to be understood. We briefly compare the predicted WF/PC count rates with those actually realized and discuss the reason for the discrepancy.
Blair William Patrick
Davidsen Arthur F.
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