2000ApJ...539..372O


Query : 2000ApJ...539..372O

2000ApJ...539..372O - Astrophys. J., 539, 372-378 (2000/August-2)

The predicted signature of neutrino emission in observations of pulsating pre-white dwarf stars.

O'BRIEN M.S. and KAWALER S.D.

Abstract (from CDS):

Pre-white dwarf (PWD) evolution can be driven by energy losses caused by neutrino emission in the core. Unlike the solar neutrino flux, this is not the by-product of nuclear fusion but is instead the result of electron-scattering processes in the hot, dense regions of the PWD core. We show that the observed rate of period change in cool PWD pulsators will constrain neutrino emission in their cores, and we identify appropriate targets for future observation. Such a measurement will tell us whether the theories of lepton interactions correctly describe the production rates and therefore neutrino cooling of PWD evolution. This would represent the first test of standard lepton theory in dense plasma.

Abstract Copyright: ∼

Journal keyword(s): Dense Matter - Elementary Particles - Plasmas - Stars: Interiors - Stars: Variables: Other - Stars: White Dwarfs

CDS comments: PG 1159, 0122, 2131 and 1707 are respectively PG 1159-035, 0122+200, 2131+066 and 1707+427

Simbad objects: 5

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Number of rows : 5
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 PG 0122+200 WD* 01 25 22.5121704552 +20 17 56.963079924   16.2   16.9   DOZ.7 117 0
2 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
3 V* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 505 0
4 PG 1707+427 WD* 17 08 47.6869215528 +42 41 00.558430656           PG1159 120 0
5 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 122 0

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