Properties of high-density binary mixtures and the age of the universe from white dwarf stars

Details Properties of high-density binary mixtures and the age of the universe from white dwarf stars Properties of high-density binary mixtures and the age of the universe from white dwarf stars

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.333..642g&link_type=abstract

Nature (ISSN 0028-0836), vol. 333, June 16, 1988, p. 642-644.

Physics

35

Cosmochemistry, Cosmology, Universe, White Dwarf Stars, Carbon, Degenerate Matter, Oxygen, Solid Phases, Stellar Luminosity

Scientific paper

The luminosity of white dwarf stars can be attributed to the cooling process of their degenerate cores. The simple relationship existing between their luminosity and their age, together with the lack of white dwarfs fainter than log(L/L_sun;) ≈ -4.5, provides a method of measuring the age of the disk and consequently that of the Universe. Here, the authors attempt to show that a galactic disk age of 15 Gyr cannot be excluded by the white dwarf observations if carbon and oxygen are immiscible in solid phase.

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