Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545208p&link_type=abstract
American Astronomical Society, AAS Meeting #215, #452.08; Bulletin of the American Astronomical Society, Vol. 42, p.462
Mathematics
Logic
Scientific paper
EC14012-1446 is a hydrogen atmosphere (DA) white dwarf pulsator. Its rich pulsation spectrum displays a range of excited modes with complex multiplet structure, in addition to numerous combination frequencies. In April 2008, EC14012-1446 was the primary target of XCOV26. We obtained over 300 hrs of nearly continuous high speed photometry with the goal of using the nonlinear pulse shapes to empirically determine the parameters of the convection zone. The Fourier transform (FT) of the light curve contains power between 1000 to 4000 microHz, with the dominant peak at 1234 microHz. We find 13 independent frequencies distributed in 8 modes, as well as a myriad of combination frequencies. We present preliminary results of our asteroseismological investigation and lay the groundwork for future investigation leading to light curve fitting of EC14012-1446. This research is funded by Mt. Cuba Observatory (Greenville, DE) and the Crystal Trust Foundation.
Dalessio James
Montgomery Martin
Provencal Judith L.
Shipman Harry
Thompson Sylvester
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