Multiple channels for the onset of magnetism in isolated white dwarfs

S Bagnulo, JD Landstreet - The Astrophysical Journal Letters, 2022 - iopscience.iop.org
The presence of a strong magnetic field is a feature common to a significant fraction of
degenerate stars, yet little is understood about the field's origin and evolution. New …

New insight into the magnetism of degenerate stars from the analysis of a volume-limited sample of white dwarfs

S Bagnulo, JD Landstreet - Monthly Notices of the Royal …, 2021 - academic.oup.com
Many stars evolve into magnetic white dwarfs (MWDs), and observations may help to
understand when the magnetic field appears at the stellar surface, if and how it evolves …

Gaia white dwarfs within 40 pc – III. Spectroscopic observations of new candidates in the Southern hemisphere

MW O'Brien, PE Tremblay… - Monthly Notices of …, 2023 - academic.oup.com
We present a spectroscopic survey of 248 white dwarf candidates within 40 pc of the Sun; of
these 244 are in the Southern hemisphere. Observations were performed mostly with the …

The Initial Mass Function Based on the Full-sky 20 pc Census of∼ 3600 Stars and Brown Dwarfs

JD Kirkpatrick, F Marocco, CR Gelino… - The Astrophysical …, 2024 - iopscience.iop.org
A complete accounting of nearby objects—from the highest-mass white dwarf progenitors
down to low-mass brown dwarfs—is now possible, thanks to an almost complete set of …

Presolar grain isotopic ratios as constraints to nuclear and stellar parameters of asymptotic giant branch star nucleosynthesis

S Palmerini, M Busso, D Vescovi, E Naselli… - The Astrophysical …, 2021 - iopscience.iop.org
Recent models for evolved low-mass stars (with M≲ 3 M⊙), undergoing the asymptotic giant
branch (AGB) phase assume that magnetic flux-tube buoyancy drives the formation of 13 C …

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 …

DAHe white dwarfs from the DESI Survey

CJ Manser, BT Gänsicke, K Inight… - Monthly Notices of …, 2023 - academic.oup.com
ABSTRACT A new class of white dwarfs, dubbed DAHe, that present Zeeman-split Balmer
lines in emission has recently emerged. However, the physical origin of these emission lines …

Magnetic dynamos in white dwarfs–III. Explaining the occurrence of strong magnetic fields in close double white dwarfs

MR Schreiber, D Belloni, M Zorotovic… - Monthly Notices of …, 2022 - academic.oup.com
The origin of strong () magnetic fields in white dwarfs has been a puzzle for decades.
Recently, a dynamo mechanism operating in rapidly rotating and crystallizing white dwarfs …

Magnetic-buoyancy-induced mixing in AGB stars: Fluorine nucleosynthesis at different metallicities

D Vescovi, S Cristallo, S Palmerini, C Abia… - Astronomy & …, 2021 - aanda.org
Asymptotic giant branch (AGB) stars are considered to be among the most significant
contributors to the fluorine budget in our Galaxy. While observations and theory agree at …

Magnetic white dwarfs in post-common-envelope binaries

SG Parsons, BT Gänsicke, MR Schreiber… - Monthly Notices of …, 2021 - academic.oup.com
Magnitude-limited samples have shown that 20–25 per cent of cataclysmic variables contain
white dwarfs with magnetic fields of Mega Gauss strength, in stark contrast to the …