Ultraviolet spectra of the N-type carbon star TX PISCIUM

Details Ultraviolet spectra of the N-type carbon star TX PISCIUM Ultraviolet spectra of the N-type carbon star TX PISCIUM

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..149j&link_type=abstract

In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 149-15

Astronomy and Astrophysics

Astrophysics

Carbon Stars, Stellar Spectra, Ultraviolet Spectra, Chromosphere, Iue, Magnesium, Stellar Models

Scientific paper

Nine IUE low resolution spectra of TX Psc, one of the brightest N-type carbon stars, were analyzed. The integrated flux of the Mg II (UV 1) line (blend of h and k) varies by a factor of 7, and the flux of other lines varies similarly and in phase. No variations greater than a factor of 2 occur in the continuous flux. Synthetic spectra from a model chromosphere show surprisingly good agreement with the IUE observations. The enormous influence of the wings of the Mg I resonance line is noted, suggesting it may be a major part of the well-known violet and ultraviolet opacity in cool carbon stars.

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