Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.266..289b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 266, NO. 2/JAN15, P. 289, 1994
Astronomy and Astrophysics
Astronomy
22
Elementary Particles - Plasmas - Stars: Evolution - White Dwarfs
Scientific paper
We present calculations of the cooling evolutionary sequences of hot (Teff > 12 × 103 K) white dwarf stars. The input physics is discussed in some detail, with special emphasis on the thermal conductivity and plasmon neutrino emission assumed. We suggest our own approximation for the latter. We find that the calculated effective temperature distribution of white dwarfs is rather sensitive to the assumed mass. The best fit to the observations yields the mass M = 0.7 Msun. With the inclusion of non-standard physics, we confirm the upper limit on the neutrino magnetic moment to be <10-11 in units of the Bohr magneton. Taking into account the bremsstrahlung of axions, we find a constraint on the axion-electron coupling (the axion fine-structure constant) of αa < 5 × 10-26.
Blinnikov Sergei I.
Dunina-Barkovskaya N. V.
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