Using Non-Sinusoidal Light Curves of Multi-Periodic Pulsators to Constrain Convection

Details Using Non-Sinusoidal Light Curves of Multi-Periodic Pulsators to Constrain Convection Using Non-Sinusoidal Light Curves of Multi-Periodic Pulsators to Constrain Convection

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..372..635m&link_type=abstract

15th European Workshop on White Dwarfs ASP Conference Series, Vol. 372, proceedings of the conference held 7-11 August, 2006 in

Astronomy and Astrophysics

Astrophysics

13

Scientific paper

We demonstrate how pulsating white dwarfs can be used as astrophysical laboratories for empirically constraining convection in these stars. We do this using a technique for fitting observed non-sinusoidal light curves, which allows us to recover the thermal response timescale of the convection zone (its ``depth'') as well as how this timescale changes as a function of instantaneous effective temperature. We present results of previous fits to the mono-periodic pulsators G29-38 and PG1351+489, and we discuss the added complexity associated with modeling multi-periodic pulsators. The multi-periodic DBV GD358 was the subject of the successful recent WET/DARC campaign, and the preliminary fits shown here represent the first such fits for a multi-periodic pulsator.

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