other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2013MNRAS.431.2554D - Mon. Not. R. Astron. Soc., 431, 2554-2559 (2013/May-3)
Chaos in large-amplitude pulsators: application to the β Cep star HD 180642.
DEGROOTE P.
Abstract (from CDS):
I argue for a third explanation for the observations, in the form of chaos due to the non-linear behaviour of the dominant radial mode.
The long-term frequency stability of the dominant radial mode is studied using archival data spanning roughly 20 years. Non-linear time series analysis techniques are applied to the CoRoT observations, and the observations are compared with simulations of a simple non-linear oscillator.
I show that chaos offers one single explanation for many of the observed features, such as the structure in the autocorrelation of the power spectrum, the long-term frequency shift, the power excess and the wide range of frequencies in the power spectrum. However, the mixture of opacity-driven linear oscillations and non-linear oscillations complicates the non-linear time series analysis techniques.
Abstract Copyright: © 2013 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s): asteroseismology - chaos - techniques: photometric - stars: early-type - stars: oscillations
Simbad objects: 4
To bookmark this query, right click on this link: simbad:2013MNRAS.431.2554D and select 'bookmark this link' or equivalent in the popup menu