Collapse of accreting carbon-oxygen white dwarfs induced by carbon deflagration at high density

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5413783

Nomoto, K

A critical condition is obtained for which carbon deflagration induces collapse of an accreting C + O white dwarf, not explosion. If the carbon deflagration is initiated at central density as high as 10/sup 10/ g cm/sup -3/ and if the propagation of the deflagration wave is slower than approx. 0.15 upsilon/sub s/ (upsilon/sub s/ is the sound speed), electron capture behind the burning front induces collapse to form a neutron star. This is the case for both conductive and convective deflagrations. Such a high central density can be reached if the white dwarf is sufficiently massive and cold at the onset of accretion and if the accretion rate is in the appropriate range. Models for Type Ia and Ib supernovae are also discussed. 66 refs., 8 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA). Physics Dept.
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5413783
• Report Number(s): BNL-38425; CONF-8603118-4; ON: DE86015076
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON
CHANDRASEKHAR THEORY
CONVECTION
DENSITY
DWARF STARS
ELEMENTS
ENERGY TRANSFER
GRAVITATIONAL COLLAPSE
HEAT TRANSFER
MASS TRANSFER
NEUTRON STARS
NONMETALS
OXYGEN
PHYSICAL PROPERTIES
STARS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
WHITE DWARF STARS