Reconstructing the evolution of white dwarf binaries: further evidence for an alternative algorithm for the outcome of the common-envelope phase in close binaries

  title={Reconstructing the evolution of white dwarf binaries: further evidence for an alternative algorithm for the outcome of the common-envelope phase in close binaries},
  author={G. A. Nelemans and Christopher A Tout},
  journal={Monthly Notices of the Royal Astronomical Society},
  • G. Nelemans, C. Tout
  • Published 12 October 2004
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We determine the possible masses and radii of the progenitors of white dwarfs in binaries from fits to detailed stellar evolution models and use these to reconstruct the mass-transfer phase in which the white dwarf was formed. We confirm the earlier finding that in the first phase of mass transfer in the binary evolution leading to a close pair of white dwarfs, the standard common-envelope formalism (the alpha-formalism) equating the energy balance in the system (implicitly assuming angular… Expand

Figures and Tables from this paper

Evolutionary Channels for the Formation of Double Neutron Stars
We analyze binary population models of double-neutron stars and compare results to the accurately measured orbital periods and eccentricities of the eight known such systems in our Galaxy. InExpand
On The Formation of Double White Dwarfs: Reevaluating How We Parametrize the Common Envelope Phase
A detailed model for the evolution of Red Giant – Main Sequence binaries during the first episode of mass transfer is presented, and it is demonstrated that their evolution into DWDs need not arise through two phases of dynamical mass loss. Expand
Modelling the formation of double white dwarfs
We investigate the formation of the ten double-lined double white dwarfs that have been observed so far. A detailed stellar evolution code is used to calculate grids of single-star and binary modelsExpand
The formation of long-period eccentric binaries with a helium white dwarf
The recent discovery of long-period eccentric binaries hosting a He-white dwarf or a subdwarf star has been challenging binary-star modeling. Based on accurate determinations of the stellar andExpand
Post-common-envelope binaries from SDSS. IX: Constraining the common-envelope efficiency
Context. Reconstructing the evolution of post-common-envelope binaries (PCEBs) consisting of a white dwarf and a main-sequence star can constrain current prescriptions of common-envelope (CE)Expand
On the Formation of Double White Dwarfs through Stable Mass Transfer and a Common Envelope
Although several dozen double white dwarfs (DWDs) have been observed, for many the exact nature of the evolutionary channel(s) by which they form remains uncertain. The canonical explanation callsExpand
The delay time distribution of type Ia supernovae: theory and observation
Abstract Using a population number synthesis code, the theoretical time distributions of type Ia supernovae in starburst galaxies are calculated, using competing models for the formation of suchExpand
Structure and spectra of irradiated secondaries in close binaries A model calculation of the pre-cataclysmic variable UU Sagittae
Context. The standard stellar model atmosphere ignores the influence of external radiation. This assumption, while sufficient for most stars, fails for many short-period binaries. Aims. In setting upExpand
White dwarf post common envelope binaries from the SDSS
Post common envelope binaries (PCEBs) consisting of a white dwarf and a main sequence star are ideal systems to calibrate current theories of angular momentum loss in close compact binary stars. TheExpand
Monte Carlo simulations of post-common-envelope white dwarf + main sequence binaries: comparison with the SDSS DR7 observed sample
Context. Detached white dwarf + main sequence (WD+MS) systems represent the simplest population of post-common envelope binaries (PCEBs). Since the ensemble properties of this population carriesExpand


Population synthesis for double white dwarfs. I. Close detached systems.
We model the population of double white dwarfs in the Galaxy and find a better agreement with observations compared to earlier studies, due to two modifications. The first is the treatment of theExpand
Stellar Masses, Kinematics, and White Dwarf Composition for Three Close DA+dMe Binaries
We determine the mass functions and mass ratios for three close white dwarf plus red dwarf binaries (EUVE J0720-317, 1016-053, and 2013+400). Hubble Space Telescope Goddard High-ResolutionExpand
Population synthesis for double white dwarfs. II. Semi-detached systems: AM CVn stars
We study two models for AM CVn stars: white dwarfs accreting (i) from a helium white dwarf companion and (ii) from a helium-star donor. We show that in the first model possibly no accretion diskExpand
The mass ratio distribution of short-period double degenerate stars
Short-period double degenerates (DDs) are close white dwarf-white dwarf binary stars which are the result of the evolution of interacting binary stars. We present the first definitive measurements ofExpand
Helium and Carbon-Oxygen White Dwarfs in Close Binaries*
We present a scenario model of the population of close binaries in which the brighter component is a helium or a carbon-oxygen white dwarf. The other, dimmer component can be a helium white dwarf, aExpand
Double degenerates among DA white dwarfs
The results of a spectroscopic survey of catalog white dwarfs in search of radial velocity variations indicative of a binary motion are reported. In a sample of 54 DA white dwarfs, one DoubleExpand
Double white dwarfs as progenitors of R Coronae Borealis stars and type I supernovae
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.Expand
Low-mass white dwarfs need friends: five new double-degenerate close binary stars
We have discovered five detached close binary stars out of seven white dwarfs chosen for their low mass (<0.45 Msun). The high success rate of our observations supports the notion that evolutionExpand
S1040 in M67: A Post-Mass Transfer Binary with a Helium Core White Dwarf
We have obtained spectra of the yellow giant S1040 in the open cluster M67 using the Goddard High-Resolution Spectrograph (GHRS) and the Faint Object Spectrograph on the Hubble Space Telescope. S1040Expand
Detached white-dwarf close-binary stars - CV's extended family
Abstract I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15Expand