Buoyant crystals halt the cooling of white dwarf stars
White dwarfs are stellar remnants devoid of a nuclear energy source, gradually cooling over
billions of years, and eventually freezing into a solid state from the inside out,. Recently, it …
billions of years, and eventually freezing into a solid state from the inside out,. Recently, it …
Magnetic field breakout from white dwarf crystallization dynamos
D Blatman, S Ginzburg - Monthly Notices of the Royal …, 2024 - academic.oup.com
ABSTRACT A convective dynamo operating during the crystallization of white dwarfs is one
of the promising channels to produce their observed strong magnetic fields. Although the …
of the promising channels to produce their observed strong magnetic fields. Although the …
The 40 pc sample of white dwarfs from Gaia
MW O'Brien, PE Tremblay, BL Klein… - Monthly Notices of …, 2024 - academic.oup.com
We present a comprehensive overview of a volume-complete sample of white dwarfs
located within 40 pc of the Sun, a significant proportion of which were detected in Gaia Data …
located within 40 pc of the Sun, a significant proportion of which were detected in Gaia Data …
An emerging and enigmatic spectral class of isolated DAe white dwarfs
AK Elms, PE Tremblay, BT Gänsicke… - Monthly Notices of …, 2023 - academic.oup.com
Two recently discovered white dwarfs, WD J041246. 84+ 754942.26 and WD J165335. 21−
100116.33, exhibit Hα and Hβ Balmer line emission similar to stars in the emerging DAHe …
100116.33, exhibit Hα and Hβ Balmer line emission similar to stars in the emerging DAHe …
Period bouncers as detached magnetic cataclysmic variables
Context. The general prediction that more than half of all cataclysmic variables (CVs) have
evolved past the period minimum is in strong disagreement with observational surveys …
evolved past the period minimum is in strong disagreement with observational surveys …
Main sequence dynamo magnetic fields emerging in the white dwarf phase
M Camisassa, JR Fuentes, MR Schreiber… - Astronomy & …, 2024 - aanda.org
Recent observations of volume-limited samples of magnetic white dwarfs (WD) have
revealed a higher incidence of magnetism in older stars. Specifically, these studies indicate …
revealed a higher incidence of magnetism in older stars. Specifically, these studies indicate …
Fluid mixing during phase separation in crystallizing white dwarfs
MH Montgomery, BH Dunlap - The Astrophysical Journal, 2024 - iopscience.iop.org
Accurate models of cooling white dwarfs must treat the energy released as their cores
crystallize. This phase transition slows the cooling by releasing latent heat and also …
crystallize. This phase transition slows the cooling by releasing latent heat and also …
A Short Intense Dynamo at the Onset of Crystallization in White Dwarfs
JR Fuentes, M Castro-Tapia… - The Astrophysical …, 2024 - iopscience.iop.org
The origin of large magnetic fields (≳ 10 6 G) in isolated white dwarfs is not clear. One
possible explanation is that crystallization of the star's core drives compositional convection …
possible explanation is that crystallization of the star's core drives compositional convection …
Unveiling the white dwarf in J191213. 72− 441045.1 through ultraviolet observations
ABSTRACT J191213. 72− 441045.1 is a binary system composed of a white dwarf and an M-
dwarf in a 4.03-h orbit. It shows emission in radio, optical, and X-ray, all modulated at the …
dwarf in a 4.03-h orbit. It shows emission in radio, optical, and X-ray, all modulated at the …
Atmospheric heating and magnetism driven by 22Ne distillation in isolated white dwarfs
The origin of atmospheric heating in the cool, magnetic white dwarf GD 356 remains
unsolved nearly 40 years after its discovery. This once idiosyncratic star with T eff≈ 7500 K …
unsolved nearly 40 years after its discovery. This once idiosyncratic star with T eff≈ 7500 K …