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Light Curves and Spectra from a Thermonuclear Explosion of a White Dwarf Merger
Daniel R. van Rossum, Rahul Kashyap, Robert Fisher +5
Double-degenerate (DD) mergers of carbon-oxygen white dwarfs have recently emerged as a leading candidate for normal Type Ia supernovae (SNe Ia). However, many outstanding question…
The white dwarf population of NGC 6397
S. Torres, E. García-Berro, L. G. Althaus +1
NGC 6397 is one of the most interesting, well observed and theoretically studied globular clusters. The existing wealth of observations allows us to study the reliability of the th…
The mass function of hydrogen-rich white dwarfs: robust observational evidence for a distinctive high-mass excess near 1Msun
A. Rebassa-Mansergas, M. Rybicka, X. -W. Liu +2
The mass function of hydrogen-rich atmosphere white dwarfs has been frequently found to reveal a distinctive high-mass excess near 1Msun. However, a significant excess of massive w…
Stellar archaeology with Gaia: the Galactic white dwarf population
Boris Gaensicke, Pier-Emmanuel Tremblay, Martin Barstow +23
Gaia will identify several 1e5 white dwarfs, most of which will be in the solar neighborhood at distances of a few hundred parsecs. Ground-based optical follow-up spectroscopy of t…
Smoothed Particle Hydrodynamics simulations of the core-degenerate scenario for Type Ia supernovae
G. Aznar-Siguán, E. García-Berro, P. Lorén-Aguilar +2
The core-degenerate (CD) scenario for type Ia supernovae (SN Ia) involves the merger of the hot core of an asymptotic giant branch (AGB) star and a white dwarf, and might contribut…
DA white dwarfs from the LSS-GAC survey DR1: the preliminary luminosity and mass functions and formation rate
A. Rebassa-Mansergas, X. -W. Liu, R. Cojocaru +9
Modern large-scale surveys have allowed the identification of large numbers of white dwarfs. However, these surveys are subject to complicated target selection algorithms, which ma…
Is the central binary system of the planetary nebula Henize 2-428 a Type Ia supernova progenitor?
Enrique Garcia-Berro, Noam Soker, Leandro G. Althaus +2
We critically discuss the recent observations of the binary system at the center of the bipolar planetary nebula Henize 2-428. We find that the proposed explanation of two equal-ma…