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| Paper: |
White Light Flare Continuum Observations with ULTRACAM |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
1157 |
| Authors: |
Kowalski, A. F.; Mathioudakis, M.; Hawley, S. L.; Hilton, E. J.; Dhillon, V. S.; Marsh, T. R.; Copperwheat, C. M. |
| Abstract: |
We present sub-second, continuous-coverage photometry of three flares on the
dM3.5e star, EQ Peg A, using custom continuum filters with
WHT/ULTRACAM. These data provide a new view of flare continuum
emission, with each flare exhibiting a very distinct light curve morphology.
The spectral shape of flare emission for the two large-amplitude
flares is compared with synthetic ULTRACAM measurements taken from the spectra during the
large ‘megaflare’ event on a similar type flare star. The white light
shape during the impulsive phase of the EQ Peg flares is consistent
with the range of colors derived from the megaflare continuum, which is known to
contain a Hydrogen recombination component and compact,
blackbody-like components. Tentative evidence in the ULTRACAM
photometry is found for an anti-correlation between the emission of these components. |
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