Evolution of binary stars and the effect of tides on binary populations
TL;DR: In this paper, a rapid binary-evolution algorithm was proposed to model the formation and evolution of binary systems, including all aspects of single-star evolution, features such as mass transfer, mass accretion, common envelope evolution, collisions, supernova kicks and angular momentum loss mechanisms.
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Abstract: We present a rapid binary-evolution algorithm that enables modelling of even the most complex binary systems. In addition to all aspects of single-star evolution, features such as mass transfer, mass accretion, common-envelope evolution, collisions, supernova kicks and angular momentum loss mechanisms are included. In particular, circularization and synchronization of the orbit by tidal interactions are calculated for convective, radiative and degenerate damping mechanisms. We use this algorithm to study the formation and evolution of various binary systems. We also investigate the effect that tidal friction has on the outcome of binary evolution. Using the rapid binary code, we generate a series of large binary populations and evaluate the formation rate of interesting individual species and events. By comparing the results for populations with and without tidal friction, we quantify the hitherto ignored systematic effect of tides and show that modelling of tidal evolution in binary systems is necessary in order to draw accurate conclusions from population synthesis work. Tidal synchronism is important but, because orbits generally circularize before Roche lobe overflow, the outcome of the interactions of systems with the same semilatus rectum is almost independent of eccentricity. It is not necessary to include a distribution of eccentricities in population synthesis of interacting binaries; however, the initial separations should be distributed according to the observed distribution of semilatera recta rather than periods or semimajor axes.
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Modules for experiments in stellar astrophysics (mesa): binaries, pulsations, and explosions
Bill Paxton,Pablo Marchant,Josiah Schwab,Evan B. Bauer,Lars Bildsten,Lars Bildsten,Matteo Cantiello,Luc Dessart,Robert Farmer,Haili Hu,Norbert Langer,Richard H. D. Townsend,Dean M. Townsley,Francis Timmes +13 more
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References
Searching for Double Degenerates: One Out of Fifty
Angela Bragaglia,Laura Greggio,Alvio Renzini,Sandro D'Odorico +3 more
- 01 Jan 1991
TL;DR: In this paper, a systematic search for binarity among spectroscopically confirmed binary white dwarfs (WDs) taken from the existing catalogues was carried out to find some systems which are close enough to merge in less than one Hubble time, i.e. with separations less than 3 R ⊙.
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Off-center ignition of nuclear burning in merging white dwarfs
TL;DR: Etude de lignition de la combustion nucleaire dans des naines blanches en fusion, pour differentes combinaisons de composantes d'etoiles avec He, C+O and O+Ne+Mg as discussed by the authors.
On the rate of novae in galaxies of different types
TL;DR: In this article, the expected nova rate in stellar systems with different star formation histories for a variety of input parameters concerning the initial binary population was calculated using a population-synthesis code.
Stellar Accretion and X-ray Emission
TL;DR: Shklovsky has suggested that the Scorpius X-ray source is a binary pair and that the X-radiation arises from the collision of material from a giant star with a neutron star as discussed by the authors.
Inward Propagation of Nuclear-burning Shells in Merging C-O and He White Dwarfs
Hideyuki Saio,Ke N.Ichi Nomoto +1 more
TL;DR: In this paper, the authors investigated the consequences of merging double white dwarf systems by calculating evolutionary models of accreting white dwarfs and found that the strength of flame sometimes oscillates because of a thermal instability in an early phase of the evolution.