Issue |
Europhys. Lett.
Volume 42, Number 1, April 1998
|
|
---|---|---|
Page(s) | 31 - 36 | |
Section | Classical areas of phenomenology | |
DOI | https://doi.org/10.1209/epl/i1998-00548-y | |
Published online | 01 September 2002 |
Low-dimensional dynamics outside the laboratory: The case of roAp stars*
1
Departamento de Física, FCEN
Ciudad Universitaria, Pab. I, c.p. 1428, Buenos Aires,
Argentina
2
Universities Space Research Center and Laborators for
High Energy Astrophysics,
NASA, Goddard Space Flight Center, code 662, Greenbelt MD 20771
USA
Received:
12
September
1997
Accepted:
19
February
1998
In this work, we build a nonlinear model to account for the time variable energy flux of a class of pulsating stars which is simple and robust, and test it against recent observations made with the Hubble Space Telescope. By the construction of a standard global normal form for the model, we not only check that the model has solutions qualitatively similar to the observations; we also fit the parameters of the model from the time series. This allows us to build confidence on a simple model for the phenomenon under study, which should be valid for a class of pulsating stars.
PACS: 47.52.+j – Chaos / 05.45.+b – Theory and models of chaotic systems
© EDP Sciences, 1998
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