Cosmochronology of White Dwarfs and Cooling Time Due to Heat Waves

Falcon Nelson^1* and Garcia Kelvin¹

¹Laboratory of Atmospheric and Outer Space Physics, FACYT, Department of Physics. University of Carabobo. Valencia, Carabobo State, Venezuela

Abstract

The standard white dwarf (WD) cooling theory is revised. The acausality implicit in the Maxwell-Fourier Law, used in the WD Standard Theory of Cooling, may be an invalid simplification in degenerate matter, where convective flows are correctly described by Cattaneo's Law. It is shown that the WD-cooling time is significantly shorter when considering causal propagation through heat waves in WD. The age of 7889 stars from the Gaia White Dwarf catalog is calculated. Additionally, the WD-age is estimated for very old stars, obtaining an average age of 12.591−0.508 +0.544 𝐺𝑦𝑟 for DA and 12.589−0.728 +0.742 𝐺𝑦𝑟 for DB. This cosmochronology allows to infer 𝐻0 ≅ 77.74−4 +4 km/sMpc in agreement with direct measurements of the Hubble constant.

Keywords

WD Cooling Time, WD: interior, Stellar Cosmochronology and Hubble tension

Corresponding Author

Falcon Nelson, Laboratory of Atmospheric and Outer Space Physics, FACYT, Department of Physics. University of Carabobo. Valencia, Carabobo State, Venezuela.

Citation

Nelson, F. & Kelvin, G. (2026). Cosmochronology of White Dwarfs and Cooling Time Due to Heat Waves. Int J Astrophys Cosmol Space Explor. 1(1), 01-11.