Type Ia Supernovae and High Velocity White Dwarfs

Abstract

I examine the hypothesis that many of the high velocity white dwarfs observed by Oppenheimer et al. (2001) are the remnants of donor stars from binaries that produced type Ia supernovae via the `single degenerate' channel. If this channel is a significant contributor to the Galactic SN Ia supernova rate, then the local density of such remnants with V>100 km/s could be as high as 2.e-4 per cubic parsec, comparable to the densities found by Oppenheimer et al. This white dwarf population differs from others in that it is composed exclusively of single stars.

12 pages, 2 postscript figures, submitted to ApJ Letters

References in corpus (10)

• Direct Detection of Galactic Halo Dark Matter
• A Determination of the Local Density of White Dwarf Stars
• High-velocity white dwarfs: thick disk, not dark matter
• Determination of Nucleosynthetic Yields of Supernovae and Very Massive Stars from Abundances in Metal-Poor Stars
• Halo White Dwarfs, Thick Disks and a Sanity Check
• MACHO 96-LMC-2: Lensing of a Binary Source in the LMC and Constraints on the Lensing Object
• On high proper motion white dwarfs from photographic surveys
• A source of high-velocity white dwarfs
• Absolute Proper Motions to B~22.5: IV. Faint, Low Velocity White Dwarfs and the White Dwarf Population Density Law
• X-ray Observations of Young Supernova Remnants

Cited by in corpus (28)

• Progenitors of type Ia supernovae
• Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-Degenerate Double-Detonation Type Ia Supernovae
• Single-degenerate type Ia supernovae without hydrogen contamination
• Spin-Up/Spin-Down models for Type Ia Supernovae
• Mass-accreting white dwarfs and type Ia supernovae
• On type Ia supernovae and the formation of single low-mass white dwarfs
• The progenitors of Type Ia supernovae with long delay times
• Initial-Final Mass Relationship for Stars of Different Metallicities
• Companion Stars of Type Ia Supernovae
• On the Interpretation of High Velocity White Dwarfs as Members of the Galactic Halo
• The helium star donor channel for the progenitors of type Ia supernovae with different metallicities
• Core-Collapse Supernovae in Binaries as the Origin of Galactic Hyper-Runaway Stars
• Gaia DR3 in 6D: The search for fast hypervelocity stars and constraints on the Galactic Centre environment
• How old are SN Ia Progenitor Systems? New Observational Constraints on the Distribution of Time Delays from GALEX
• LP 400-22, A very low-mass and high-velocity white dwarf
• The galactic population of white dwarfs
• Companion stars of Type Ia supernovae and single low-mass white dwarfs
• A Critical Examination of Halo White Dwarf Candidates
• A likely candidate of type Ia supernova progenitors: the X-ray pulsating companion of the hot subdwarf HD 49798
• Distant White Dwarfs in the US Naval Observatory Flagstaff Station Parallax Sample
• Trigonometric parallaxes of high velocity halo white dwarf candidates
• Mergers of Equal-Mass Binaries with Compact Object Companions from Mass Transfer in Triple Star Systems
• Discovery of a nearby halo white dwarf with proper motion mu=2.55 arcsec/yr
• On the origins of extreme velocity stars as revealed by large-scale Galactic surveys
• A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate
• Properties and applications of a predicted population of runaway He-sdO/B stars ejected from single degenerate He-donor SNe
• The origin of hypervelocity white dwarfs in the merger-disruption of He-CO white dwarfs
• Hot subdwarfs from the surviving companions of the white dwarf + main-sequence channel of Type Ia supernovae