CoRoT Symposium 3, Kepler KASC-7 joint meeting
6-11 Jul 2014 Toulouse (France)

Abstracts > Kim Agnes

Seven-Period Asteroseismic Fit of KIC 8626021
Agnes Kim  1@  , Roy Ostensen  2@  , J.j. Hermes  3@  , Judi Provencal  4@  
1 : Penn State Worthington Scranton  (PSWS)  -  Website
120 Ridge View Drive, Dunmore PA 18512 | 570-963-2500 -  United States
2 : KU Leuven [Leuven]  -  Website
Oude Markt 13 3000 Leuven -  Belgium
3 : Department of Physics [Warwick]  -  Website
University of Warwick Gibbet Hill Road Coventry CV4 7AL -  United Kingdom
4 : University of Delaware [Newark]  -  Website
Newark, DE 19716 USA -  United States

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 ell 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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