Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341006o&link_type=abstract
American Astronomical Society, AAS Meeting #213, #410.06; Bulletin of the American Astronomical Society, Vol. 41, p.212
Astronomy and Astrophysics
Astronomy
Scientific paper
TT Hydrae (HD 97528) is an Algol-type interacting binary star system composed of a B9.5 V primary star and a K0 III-IV companion in a 6.95 day orbit. The companion fills its Roche Lobe and is transferring material to the primary star. This material is having a glancing impact upon the primary star. The presence of spectral lines from high temperature ions in the IUE spectra at all orbital phases indicates the accreting material may form a hot river that flows around the equatorial regions of the primary star. Emission lines in spectra taken by HST during totality of primary eclipse may originate in an optically thin disk orbiting the B-type star. The disk needs to be optically thin because some of these spectral lines have no observable absorption counterpart in the IUE spectra.
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