Out-of-Eclipse H-α Emission in RW Tau

Details Out-of-Eclipse H-α Emission in RW Tau Out-of-Eclipse H-α Emission in RW Tau

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...18111908v&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #119.08; Bulletin of the American Astronomical Society, Vol. 25, p.742

Astronomy and Astrophysics

Astronomy

Scientific paper

H-alpha observations of the Algol RW Tau were obtained over a four year period (Oct 88-- Sep 92) at 1.3 Angstroms resolution, with coverage over the full orbit. Strong single-peaked emission near quadrature is easily seen in the raw spectra. Subtracting the stellar components' light reveals that an second, often double-peaked emission component is present at almost all phases, at most epochs. An absorption component is seen just before and after primary eclipse. Visibility and velocities for the strong emission place it between the stellar components, near the primary star. Depending on the epoch, this emission has one of two distinct patterns in a velocity verses phase plot. The secondary emission feature's visibility and velocity indicate that it arrises from a transient accretion ring. In addition, early results from a survey of out-of-eclipse H-alpha emission in a variety of short period Algols are presented.

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