Asteroseismology of the Kepler field DBV white dwarf. It is a hot one

Agnès Bischoff-Kim, Roy H. Stensen

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Abstract

We present an asteroseismic analysis of the helium atmosphere white dwarf (a DBV) recently found in the field of view of the Kepler satellite. We analyze the five-mode pulsation spectrum that was produced based on one month of short-cadence Kepler data. The pulsational characteristics of the star and the asteroseismic analysis strongly suggest that the star is hotter (29,200K) than the 24,900K suggested by model fits to the low signal-to-noise survey spectrum of the object. This result has profound and exciting implications for tests of the standard model of particle physics. Hot DBVs are expected to lose over half of their energy through the emission of plasmon neutrinos. Continuous monitoring of the star with the Kepler satellite over the course of 3-5 years is not only very likely to yield more modes to help constrain the asteroseismic fits, but also to allow us to obtain a rate of change of any stable mode and therefore measure the emission of plasmon neutrinos.

Original languageEnglish (US)
Article numberL16
JournalAstrophysical Journal Letters
Volume742
Issue number1
DOIs
StatePublished - Nov 20 2011

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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