Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262l..47m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 262, Nov. 15, 1982, p. L47-L51.
Astronomy and Astrophysics
Astronomy
15
Iue, Plasma Jets, Spaceborne Astronomy, Stellar Envelopes, Ultraviolet Astronomy, Variable Stars, Emission Spectra, Far Ultraviolet Radiation, Line Spectra, Silicon
Scientific paper
Ultraviolet spectra were obtained with the International Ultraviolet Explorer of the newly discovered optical-radio jet feature in the symbiotic variable R Aquarii. The far-UV continuum of the jet is characterized by strong continuum which rises with decreasing wavelength in the 1200-2000 A wavelength range and is considerably different in appearance from the relatively flat continuum exhibited by ionized nebulosity in the central star. Prominent Si III semi-forbidden lines and Si II emission lines seen in the central region are virtually absent in the jet. This could reflect the depletion of silicon in the feature, the result of grain formation in material that has been ejected by the central star. Consistent with this interpretation is the overall excitation of the jet that suggests it is cooler than the nebulosity that engulfs the central UV object.
Kafatos Menas
Michalitsianos Andrew G.
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