Abstract
view Abstract Citations (24) References (64) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Rapid Line-Profile Variations of the Be Star zeta Tauri Yang, S. ; Walker, G. A. H. ; Hill, G. M. ; Harmanec, P. Abstract Subfeatures at about 0.5 percent of the continuum move from blue to red through the line profiles of the Be/shell star Zeta Tau. They resemble subfeatures observed in other stars thought to be nonradial pulsators and their average spacing (0.095d) and acceleration (1550 km/s per d) are consistent with m = 14 + or - 2. The linewidths vary with a period (0.683d) which is consistent with an l = 2 mode. After removal of ellipsoidal-like variations from the linewidths, a period (0.1097d) which is similar to the average subfeature spacing is also detected. A formulation which corrects for the effects of pulsation on the observed subfeature motion has been derived and used to estimate a consistent stellar radius (9.7 solar radii) and rotation period (1.39d). The shell components of H-beta and H-gamma also show signs of small-amplitude (about 0.5 percent of the continuum) rapid (of the order of a few hours) line-strength variations. Publication: The Astrophysical Journal Supplement Series Pub Date: October 1990 DOI: 10.1086/191510 Bibcode: 1990ApJS...74..595Y Keywords: B Stars; Shell Stars; Stellar Oscillations; Stellar Spectra; Line Spectra; Spectral Line Width; Stellar Rotation; Taurus Constellation; Astrophysics; LINE PROFILES; STARS: BE; STARS: INDIVIDUAL HENRY DRAPER NUMBER: HD 37202; STARS: PULSATION full text sources ADS | data products SIMBAD (1)
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