White-light oscillations during a flare on II Peg

Michail Mathioudakis, J.H. Seiradakis, D.R. Williams, S. Avgoloupis, Shaun Bloomfield, R.T.J. McAteer

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Abstract

We analyse the intensity oscillations observed in the gradual phase of a white-light flare on the RS CV n binary II Peg. Fast Fourier Transform power spectra and Wavelet analysis reveal a period of 220 s. The reliability of the oscillation is tested using several criteria. Oscillating coronal loop models are used to derive physical parameters such as temperature, electron density and magnetic field strength associated with the coronal loop. The derived parameters are consistent with the near-simultaneous X-ray observations of the flare. There is no evidence for oscillations in the quiescent state of the binary.
Original languageEnglish
Pages (from-to)1101-1104
Number of pages4
JournalAstronomy and Astrophysics
Volume403
Issue number3
DOIs
Publication statusPublished - Jun 2003

ASJC Scopus subject areas

  • Space and Planetary Science

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    Mathioudakis, M., Seiradakis, J. H., Williams, D. R., Avgoloupis, S., Bloomfield, S., & McAteer, R. T. J. (2003). White-light oscillations during a flare on II Peg. Astronomy and Astrophysics, 403(3), 1101-1104. https://doi.org/10.1051/0004-6361:20030394