Dynamic mass exchange in doubly degenerate binaries. I - 0.9 and 1.2 solar mass stars

Abstract

view Abstract Citations (417) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dynamic Mass Exchange in Doubly Degenerate Binaries. I. 0.9 and 1.2 Msun Stars Benz, W. ; Bowers, R. L. ; Cameron, A. G. W. ; Press, W. H. . Abstract The dynamic mass exchange process in doubly degenerate binaries was investigated using a three-dimensional numerical simulation of the evolution of a doubly degenerate binary system in which the primary is a 1.2-solar-mass white dwarf and the Roche lobe filling secondary is a 0.9-solar-mass dwarf. The results show that, in a little more than two orbital periods, the secondary is completely destroyed and transformed into a thick disk orbiting about the primary. Since only a very small fraction of the mass (0.0063 solar mass) escapes the system, the evolution of the binary results in the formation of a massive object. This object is composed of three parts, the initial white dwarf primary, a very hot pressure-supported spherical envelope, and a rotationally supported outer disk. The evolution of the system can be understood in terms of a simple analytical model where it is shown that the angular momentum carried by the mass during the transfer and stored in the disk determines the evolution of the system. Publication: The Astrophysical Journal Pub Date: January 1990 DOI: 10.1086/168273 Bibcode: 1990ApJ...348..647B Keywords: Binary Stars; Degenerate Matter; Stellar Evolution; Stellar Mass Accretion; Symbiotic Stars; White Dwarf Stars; Angular Momentum; Computational Astrophysics; Gravitational Waves; Stellar Temperature; Supernovae; Astrophysics; HYDRODYNAMICS; STARS: ACCRETION; STARS: BINARIES; STARS: EVOLUTION; STARS: WHITE DWARFS full text sources ADS | Related Materials (1) Part 2: 1989LNP...328..511B