Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.385m&link_type=abstract
In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 385-388 (SEE N89-10682 01-89)
Astronomy and Astrophysics
Astronomy
Atomic Spectra, Carbon, Iue, Spaceborne Astronomy, Symbiotic Stars, Ultraviolet Astronomy, Ultraviolet Spectra, Stellar Spectra, Stellar Winds
Scientific paper
The C IV lambda lambda 1548.2,1550.8 resonance doublet in a symbiotic stars was shown to exhibit anomalous line intensity ratios in which I (lambda 1548.2)/I(lambda 1550.8) less than 1, or less than the optically-thick limit of unity. The R Aquarii-central HII region and RX Puppis exhibit this phenomena. The I(lambda 1548.2)/I(lambda 1550.8) ratio in RX Puppis is found to vary inversely with the total C IV line intensity, and with the FES-visual light, as the object declined over a 5 yr period following a brightening in UV and optical emission which peaked in 1982. This doublet intensity behavior could be explained by a wind which has a narrow velocity range of 600 approx. less thanv wind approx. less than 1000 km/sec, or by the pumping of the Fe II (mul. 45.01) transition a4 F9/2 - y4 H(o)11/2 by C IV lambda 1548.2, which effectively scatters C IV photons into the Fe II spectrum in these objects.
Fahey Richard P.
Kafatos Menas
Michalitsianos Andrew G.
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