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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 the… Expand
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 disk… Expand
The gravitational wave signal from the Galactic disk population of binaries containing two compact objects.
We review the properties of Galactic binaries containing two compact objects, as derived by means of population synthesis. Using this information we calculate the gravitational wave signal of these… Expand
Short-period AM CVn systems as optical, X-ray and gravitational-wave sources
We model the population of AM CVn systems in the Galaxy and discuss the detectability of these systems with optical, X-ray and gravitational-wave detectors. We concentrate on the short-period (P <… Expand
Type Ia Supernovae: An Examination of Potential Progenitors and the Redshift Distribution
We examine the possibility that Type Ia supernovae (SNe Ia) are produced by white dwarfs accreting from Roche lobe filling evolved companions, under the assumption that a strong optically thick… Expand
The chemical composition of donors in AM CVn stars and ultracompact X-ray binaries: observational tests of their formation
We study the formation of ultra-compact binaries (AM CVn stars and ultra-compact X-ray binaries) with emphasis on the surface chemical abundances of the donors in these systems. Hydrogen is not… Expand
He-accreting white dwarfs: accretion regimes and final outcomes
The behaviour of carbon-oxygen white dwarfs (WDs) subject to direct helium accretion is extensively studied. We aim to analyze the thermal response of the accreting WD to mass deposition at different… Expand
Type-Ia supernovae in dense circumstellar gas
We propose a model for the bolometric light curve of a type-Ia supernova (SN Ia) that explodes in a dense circumstellar (CS) envelope. Our modeling of the light curves for SN 2002ic and SN 1997cy… Expand
Supernova Rates: A Cosmic History
We discuss the cosmic history of supernovae on the basis of various assumptions and recent data on the star formation history. We show that supernovae rates as a function of redshift can be used to… Expand
Cygnus X-3 and the problem of the missing Wolf-Rayet X-ray binaries
Cygnus X-3 is a strong X-ray source (LX ≈ 10 38 erg s −1 ) which is thought to consist of a compact object accreting matter from a helium star. We analytically find that the estimated ranges of… Expand