2007/12/02 by J. F. Gonzalez, J. F. González, S. Hubrig +4 · 2 citations
Physics and Astronomy · #A-type main-sequence star #Asteroseismology #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics and Star Formation Studies #Be star #Flare star #Herbig Ae/Be star #K-type main-sequence star #Line (geometry) #Physics #Radial velocity #Spectral line #Spectrograph #Star (game theory) #Stars #Stellar rotation #Stellar, planetary, and galactic studies #T Tauri star #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2007.12779.x
5 pages, 4 figures, 1 table, accepted for publication in MNRAS
arxiv created 2007/12/02 · openalex publication_date 2008/01/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Asteroseismology has the potential to provide new insights into the physics of stellar interiors. We have obtained Ultraviolet and Visual Echelle Spectrograph high time-resolution observations of the δ Scuti star HD 21190 and of the Ap Sr star HD 218994 to search for pulsational line profile variations. We report the discovery of a new roAp star, HD 218994, with a pulsation period of 14.2 min. This is one of the most evolved roAp stars. No rapid pulsations have been found in the spectra of the cool Ap star –δ Scuti star HD 21190. However, we detect with unprecedented clarity for a δ Scuti star moving peaks in the cores of spectral lines that indicate the presence of high-degree non-radial pulsations in this star.