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Two Modes of Pulsation in the Rapidly Rotating O9.5 Dwarf, HD 93521
Published online by Cambridge University Press: 12 April 2016
Abstract
We present preliminary results of a time-series analysis on the He II λ4541Å, Si III λλ4552, 4567, 4575Å and Hβ λ486lÅ lines of the late O-type dwarf, HD 93521. The spectra show line-profile variations (lpv) − ‘bumps’ and ‘dips’ − of amplitude ∼ 1% of the continuum, moving systematically redwards through the photospheric absorption lines. The analysis implies non-radial pulsation (NRP) as the origin for the lpv.
- Type
- Part 2. Poster Papers
- Information
- International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 309 - 310
- Copyright
- Copyright © Astronomical Society of the Pacific 1995