Spectra of Cassiopeia A. I - Observations

Details Spectra of Cassiopeia A. I - Observations Spectra of Cassiopeia A. I - Observations

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218..142k&link_type=abstract

Astrophysical Journal, Part 1, vol. 218, Nov. 15, 1977, p. 142-147.

Astronomy and Astrophysics

Astrophysics

71

Astronomical Spectroscopy, Cassiopeia A, Emission Spectra, Supernova Remnants, Abundance, Line Spectra, Oxygen Spectra, Tables (Data)

Scientific paper

Image-tube spectrograms of the supernova remnant Cas A in the wavelength range 4700-8000 A have been reduced to give relative line intensities, for 19 fast moving knots and seven quasi-stationary flocculi. In the fast-moving knots, previously unobserved lines of (Ar III), (Ar IV), (Ar V), O I, (O I), (Ca II), and Fe II have been measured, while more stringent upper limits have been set on H alpha, H beta, lines of helium, and lines of nitrogen. In the quasi-stationary flocculi, new lines of (O III), (Fe II), (N I), (N II), He I, (S II), (Ar III), (Ca II), and (O II) have been measured. The results are consistent with earlier investigations, but are more detailed.

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