Journal ArticleDOI
Double white dwarfs as progenitors of R Coronae Borealis stars and type I supernovae
Reads0
Chats0
TLDR
In this article, the authors explored the role of mass transfer in the evolution of double degenerate systems and found that low-mass helium/helium pairs are unstable to dynamical time-scale mass transfer and probably coalesce to form helium-burning sdO stars.Abstract:
Close double white dwarfs should arise from the second phase of mass exchagne in close binaries which first encountered mass exchange while the more massive star was crossing the Hertzprung gap. Tidal mass transfer in these double degenerate systems is explored. The sequence of double white dwarf divides naturally into three segments. (1) Low-mass helium/helium pairs are unstable to dynamical time-scale mass transfer and probably coalesce to form helium-burning sdO stars. (2) In helium/carbon-oxygen pairs, mass transfer occurs on the time scale for gravitational radiation losses (approx.10/sup -4/ M/sub sun/ yr/sup -1/); the accreted helium is quickly ignited, and the accretor expands to dimensions characteristic of R CrB stars, engulfing its companion star. (3) Carbon-oxygen/carbon-oxygen pairs are again unstable to dynamical time-scale mass transfer and, since their total masses exceed the Chandrasekhar limit, are destined to become supernovae. Inactive lifetimes in these latter systems between creation and interaction can exceed 10/sup 10/ years. Birthrates of R CrB stars and Type I supernovae by evolution of double white dwarfs are in reasonable agreement with observational estimates.read more
Citations
More filters
Journal ArticleDOI
Relativistic Binaries in Globular Clusters
TL;DR: In this article, theoretical models of globular cluster evolution and binary evolution, techniques for simulating this evolution that leads to relativistic binaries, and current and possible future observational evidence for this population are discussed.
Journal ArticleDOI
Remnants of binary white dwarf mergers
Cody Raskin,Evan Scannapieco,Chris L. Fryer,Gabriel Rockefeller,Francis Timmes,Francis Timmes +5 more
TL;DR: In this paper, a comprehensive smooth particle hydrodynamics simulation survey of double-degenerate white dwarf binary mergers of varying mass combinations was carried out to establish correspondence between initial conditions and remnant configurations.
Journal ArticleDOI
The Effect of Starburst Metallicity on Bright X-Ray Binary Formation Pathways
T. Linden,T. Linden,Vicky Kalogera,J. F. Sepinsky,J. F. Sepinsky,Andrea Prestwich,Andreas Zezas,John S. Gallagher +7 more
TL;DR: In this article, the authors investigate the characteristics of young high-mass X-ray binaries and find the population to be strongly metallicity-dependent, and discuss the most important model parameters affecting the HMXB population at both low and high metallicities.
Journal ArticleDOI
Type Ia supernovae and the formation of single low-mass white dwarfs
TL;DR: In this article, the authors investigated the likely remnants of type Ia supernovae, including the effects of the explosion on the envelope of the donor star, and calculated the expected kinematics of the potential remnants of SNe Ia.
Journal ArticleDOI
Initial-final mass relationship for stars of different metallicities
TL;DR: In this paper, the dependence of the initial-final mass relationship (IFMR) on metallicity has been investigated and it was shown that the final mass of stars with a given initial mass increases with increasing or decreasing metallivity.
Related Papers (5)
Supernovae of type I as end products of the evolution of binaries with components of moderate initial mass (M< or approx. =9 M/sub sun/)
I. Iben,A.V. Tutukov +1 more
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Adam G. Riess,Alexei V. Filippenko,Peter Challis,Alejandro Clocchiatti,Alan H. Diercks,Peter M. Garnavich,R. L. Gilliland,Craig J. Hogan,Saurabh Jha,Robert P. Kirshner,Bruno Leibundgut,Mark M. Phillips,David J Reiss,Brian P. Schmidt,R. A. Schommer,R. Chris Smith,R. Chris Smith,Jason Spyromilio,Christopher W. Stubbs,Nicholas B. Suntzeff,John L. Tonry +20 more
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Saul Perlmutter,Greg Aldering,Gerson Goldhaber,Gerson Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,Sebastien Fabbro,A. Goobar,A. Goobar,Donald E. Groom,I. M. Hook,I. M. Hook,A. G. Kim,A. G. Kim,A. G. Kim,M. Y. Kim,Julia C. Lee,Julia C. Lee,Nelson J. Nunes,Nelson J. Nunes,Reynald Pain,Reynald Pain,C. R. Pennypacker,C. R. Pennypacker,Robert Quimby,Christopher Lidman,Richard S. Ellis,Mike Irwin,Richard G. McMahon,Pilar Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Nino Panagia,Heidi Jo Newberg,Warrick J. Couch +44 more