Seven-Period Asteroseismic Fit of KIC 8626021
1 Penn State Worthington Scranton, Dunmore, PA 18512, USA
2 Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Belgium
3 Department of Physics, The University of Warwick, Coventry CV4 7AL, UK
4 Department of Physics and Astronomy, University of Delaware, Newark DE 19716, USA
a e-mail: email@example.com
Published online: 23 September 2015
We present a new, better-constrained asteroseismic analysis of the helium-atmosphere (DB) white dwarf discovered in the field of view of the original Kepler mission. Observations obtained over the course of two years yield at least seven independent modes, two more than were found in the discovery paper for the object. With several triplets and doublets, we are able to fix the ℓ and m identification of several modes before performing the fitting, greatly reducing the number of assumptions we must make about mode identification. We find a very thin helium layer for this relative hot DB, which adds evidence to the hypothesis that helium diffuses outward during DB cooling.
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