Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.338.1057s&link_type=abstract
Monthly Notice of the Royal Astronomical Society, Volume 338, Issue 4, pp. 1057-1066.
Astronomy and Astrophysics
Astronomy
10
Magnetic Fields, Stars: Flare, Stars: Individual: Ae Aqr, Novae, Cataclysmic Variables, Stars: Winds, Outflows
Scientific paper
Using high-time-resolution (72 ms) spectroscopy of AE Aqr obtained with LRIS on Keck II we have determined the spectrum and spectral evolution of a small flare. Continuum and integrated line fluxes in the flare spectrum are measured, and the evolution of the flare is parametrized for future comparison with detailed models of the flares. We find that the velocities of the flaring components are consistent with those previously reported for AE Aqr by Welsh, Horne & Gomer and Horne. The characteristics of the 33-s oscillations are investigated: we derive the oscillation amplitude spectrum, and from that determine the spectrum of the heated regions on the rotating white dwarf. Blackbody fits to the major and minor pulse spectra and an analysis of the emission-line oscillation properties highlight the shortfalls in the simple hotspot model for the oscillations.
Gomer Richard
Horne Keith
O'Brien Kieran
Oke Bev J.
Pearson K. J.
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