Results 41 to 50 of about 262,747 (125)
Impact of Sub-MeV Dark Matter on the Cooling of Pulsating White Dwarfs [PDF]
Phys. Rev. D 111, 083006,2025In our galaxy, white dwarfs inevitably undergo scattering and capture processes with the interstellar diffuse dark matter. The captured dark matter forms a dark halo that eventually evaporates or annihilates. Theoretical pulsation modes and observations of pulsating white dwarfs provide predictions about their evolution.
arxiv +1 more source
Presupernova evolution of accreting white dwarfs with rotation [PDF]
Astron.Astrophys. 419 (2004) 623, 2004 We discuss the effects of rotation on the evolution of accreting carbon-oxygen white dwarfs, with the emphasis on possible consequences in Type Ia supernova (SN Ia) progenitors. Starting with a slowly rotating white dwarf, we simulate the accretion of matter and angular momentum from a quasi-Keplerian accretion disk.
arxiv +1 more source
Absolute Proper Motions to B~22.5: IV. Faint, Low Velocity White Dwarfs and the White Dwarf Population Density Law [PDF]
, 2001 The reduced proper motion diagram (RPMD) for a complete sample of faint stars with high accuracy proper motions in the North Galactic Pole field SA57 is investigated. Eight stars with very large reduced proper motions are identified as faint white dwarf candidates.
arxiv +1 more source
Frontiers in Aging Neuroscience, 2022 White matter hyperintensities (WMHs) are associated with cognitive decline. Assessing the effect of WMH on WM microstructural changes and its relationships with structural and functional connectivity to multiple cognitive domains are helpful to better ...
Tae Kim +11 more
doaj +1 more source
White dwarfs and Galactic dark matter [PDF]
Mon.Not.Roy.Astron.Soc. 339 (2003) 817, 2002 We discuss the recent discovery by Oppenheimer et al (2001) of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more mundane white dwarfs of the stellar halo and thick disk would contribute sufficiently to explain the new high velocity white dwarfs without invoking
arxiv +1 more source
arXiv, 2023 White dwarfs are the most common endpoints of stellar evolution. They are often found in close binary systems in which the white dwarf is accreting matter from a companion star, either via an accretion disc or channelled along the white dwarf magnetic field lines.
arxiv
Alzheimer’s Research & Therapy, 2023 Background White matter hyperintensities, a neuroimaging marker of small-vessel cerebrovascular disease and apolipoprotein ε4 (APOE4) allele, are important dementia risk factors.
Ashwati Vipin +8 more
doaj +1 more source
High proper motion white dwarfs and halo dark matter [PDF]
Mon.Not.Roy.Astron.Soc. 336 (2002) 971, 2002 The interpretation of the old, cool white dwarfs recently found by Oppenheimer et al. (2001) is still controversial. Whereas these authors claim that they have finally found the elusive ancient halo white dwarf population that contributes significantly to the mass budget of the galactic halo, there have been several other contributions that argue that ...
arxiv +1 more source
iRADIOLOGYWhite matter hyperintensities (WMH) are very widespread in older adults and are imaging features of both cerebral small‐vessel disease and white matter microstructural impairments. Recent studies have demonstrated a close association between WMH and some
Hui Huang +7 more
doaj +1 more source