2011ApJ...742L..16B


Query : 2011ApJ...742L..16B

2011ApJ...742L..16B - Astrophys. J., 742, L16 (2011/November-3)

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

BISCHOFF-KIM A. and OSTENSEN R.H.

Abstract (from CDS):

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 (29,200 K) than the 24,900 K 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.

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Journal keyword(s): dense matter - elementary particles - stars: oscillations - stars: variables: general - white dwarfs

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
2 GD 358 WD* 16 47 18.3925183824 +32 28 32.862804384 12.511 13.530 13.653 13.752 13.852 DB2 364 0
3 GALEX J192904.6+444708 WD* 19 29 04.6788742824 +44 47 09.028359420   18.3   18.5   DB 48 0
4 V* QU Tel WD* 20 09 40.1871967824 -52 25 15.864452508 14.51 15.25 15.03     DB2 60 1

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