Astronomy and Astrophysics – Astronomy
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...190.4202p&link_type=abstract
American Astronomical Society, 190th AAS Meeting, #42.02; Bulletin of the American Astronomical Society, Vol. 29, p.835
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present the first results from FUV observations of six Algol-type interacting binary stars obtained with the UC Berkeley spectrometer on the ORFEUS-SPAS II payload that was flown on STS-80 in November/December 1996. Spectra in the region 900-1220 Angstroms at a resolution of 90 km s(-1) were obtained of AU Mon (B3Ve + F8III, P=11.11 d., phi = 0.58), Z Vul (B3V + A2III, 2.46 d., 0.27), U CrB (B6V + F8III-IV, 3.45 d., 0.62), TX UMa (B8V + F2III-IV, 3.06 d.,0.43, 0.45), TT Hya (B9.5V + K0III-IV, 6.95 d., 0.63, 0.95, 0.19), and SX Cas (A6-disk + K3III, 36.57 d., 0.02). S/N ratios in the range 15-50 were achieved. The spectra of these interacting binary systems, including the emission lines from intermediately-ionized species observed in SX Cas during totality, will be discussed in detail. We will present evidence for the presence/absence of highly-ionized species such as O VI and bipolar flows, an intercomparison of the systems, and a comparison between the observations and the expectations from mass transfer models for these systems. We thank NASA for support of this mission and its data reduction.
Peters Geraldine Joan
Polidan Ronald S.
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