Mathematics – Logic
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324.1016f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 15, 1988, p. 1016-1025. Research supported by the U.S.-Spain Join
Mathematics
Logic
66
Emission Spectra, Iue, Satellite Observation, Stellar Spectra, Symbiotic Stars, Binary Stars, Energy Spectra, Line Spectra, Red Giant Stars, Stellar Winds
Scientific paper
The authors describe the results of an extensive monitoring of the ultraviolet spectrum of the symbiotic star Z And based on high- and low-resolution IUE observations made during 1978 - 1982, when the star was in a phase of quiescence. Large variations of the Balmer continuum and emission-line intensities where observed on a time scale of about 760 days, with maxima and minima in phase with the UBV and Hα variability. The following spectral components are identified in the UV-to-IR energy spectrum of Z And: (1) a non variable M3.5 giant; (2) a hot source with a temperature ≥105K and a mean radius of 0.07 R_sun;; and (3) a nebular component associated with the hot source. A binary model of Z And with a period of 760 days is presented.
Cassatella Angelo
Fernandez-Castro Telmo
Gimenez Alvaro
Viotti Roberto
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