Type Ia supernovae - Constraints on baryonic dark matter

Journal Article · Wed May 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/169990· OSTI ID:5393070

Smecker, T A; Wyse, R F.G. ^[1]

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1. Johns Hopkins University, Baltimore, MD (USA)

Models in which the dark matter of galaxy halos is in the form of white dwarfs (WDs) are examined. Major constraints, which have been previously neglected, result from the occurrence of Type Ia supernovae, which are the products of merging WDs in binary systems whose orbits decay due to the emission of gravitational wave radiation. The lack of observed supernovae in the outer regions of galaxies, together with the relatively low abundance of iron in the hot, X-ray gas of galactic halos, limit the fraction of binaries to far less than 1 percent in extant models of WD-dominated halos, for standard Type Ia parameters. This binary fraction is much smaller than that believed typical for luminous stars, necessitating a further peculiarity in the star-formation process during the formation of the dark halo. 44 refs.

• OSTI ID: 5393070
• Journal Information: Astrophysical Journal; (United States), Vol. 372; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALAXIES
MATHEMATICAL MODELS
NONLUMINOUS MATTER
BARYONS
BINARY STARS
CHEMICAL COMPOSITION
COSMIC GASES
COSMOLOGY
GALACTIC EVOLUTION
GRAVITATIONAL INTERACTIONS
GRAVITATIONAL RADIATION
MORPHOLOGY
STAR EVOLUTION
STAR MODELS
SUPERNOVAE
WHITE DWARF STARS
X RADIATION
BASIC INTERACTIONS
DWARF STARS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
FLUIDS
GASES
HADRONS
INTERACTIONS
IONIZING RADIATIONS
MATTER
RADIATIONS
STARS
VARIABLE STARS
640105* - Astrophysics & Cosmology- Galaxies