Issue |
A&A
Volume 375, Number 1, August III 2001
|
|
---|---|---|
Page(s) | 113 - 121 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20010809 | |
Published online | 15 August 2001 |
20 CVn: A monoperiodic radially pulsating δ Scuti star*
1
Observatoire de la Côte d'Azur, UMR 6528, BP 4229, 06304 Nice Cedex 04, France
2
European Southern Observatory, Alonso de Cordova 3107-Vitacura, PO 19001 Santiago, Chile
3
Katholieke Universiteit Leuven, Instituut voor Sterrenkunde, Celestijnenlaan 200 B, 3001 Leuven, Belgium
Corresponding author: M. Chadid, mchadid@eso.org
Received:
19
March
2001
Accepted:
30
May
2001
We present a new spectroscopic study of the δ Scuti star 20 CVn in order to solve the controversy on the type of pulsation mode of this object. The spectra were obtained at the Observatoire de Haute-Provence, with the Echelle spectrograph ELODIE. Using the correlation configuration of the instrument, sinusoidal moment variations are clearly detected, with a frequency in perfect agreement with the photometric one. Using the moment method, we conclude that only the radial mode is able to explain the observed moment variations and leads to a good fit to the observed line profiles. The new data thus allow us to confirm the photometric results, i.e. 20 CVn exhibits a monoperiodic radial pulsation.
Key words: stars: oscillations / stars: variables: δ Sct / stars: individual: 20 CVn
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.