103 citations · 443 across the 16 of their papers we have counts for
16 papers
3D Hydrodynamical Simulations of Helium-Ignited Double-degenerate White Dwarf Mergers
Niranjan Roy, Vishal Tiwari, Alexey Bobrick +6
The origins of type Ia supernovae (SNe Ia) are still debated. Some of the leading scenarios involve a double detonation in double white dwarf (WD) systems. In these scenarios, heli…
Self-gravitating barotropic equilibrium configurations of rotating bodies with SPH
Domingo García-Senz, Rubén M. Cabezón, José M. Blanco Iglesias +1
We present a novel relaxation method to build three-dimensional rotating structures of barotropic bodies using the SPH technique. The method is able to relax gaseous structures in…
One-Armed Spiral Instability in Double-Degenerate Post-Merger Accretion Disks
Rahul Kashyap, Robert Fisher, Enrique García-Berro +3
Increasing observational and theoretical evidence points to binary white dwarf mergers as the origin of some if not most normal Type Ia supernovae (SNe Ia). In this paper, we discu…
White dwarf dynamical interactions and fast optical transients
Enrique García-Berro, Carles Badenes, Gabriela Aznar-Siguán +1
Recent advances in time-domain astronomy have uncovered a new class of optical transients with timescales shorter than typical supernovae and a wide range of peak luminosities. Sev…
A common origin of magnetism from planets to white dwarfs
Jordi Isern, Enrique García-Berro, Baybars Külebi +1
Isolated magnetic white dwarfs have field strengths ranging from kilogauss to gigagauss. However, the origin of the magnetic field has not been hitherto elucidated. Whether these f…
Spiral Disk Instability Can Drive Thermonuclear Explosions in Binary White Dwarf Mergers
Rahul Kashyap, Robert Fisher, Enrique García-Berro +3
Thermonuclear, or Type Ia supernovae (SNe Ia), originate from the explosion of carbon--oxygen white dwarfs, and serve as standardizable cosmological candles. However, despite their…
On the possible observational signatures of white dwarf dynamical interactions
G. Aznar-Siguán, E. García-Berro, M. Magnien +1
We compute the possible observational signatures of white dwarf dynamical interactions in dense stellar environments. Specifically, we compute the emission of gravitational waves,…
White dwarf constraints on a varying
Enrique García-Berro, Santiago Torres, Leandro G. Althaus +4
A secular variation of modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code, an up-to-date pulsational code,…
Detonations in white dwarf dynamical interactions
Gabriela Aznar-Siguán, Enrique García-Berro, Pablo Lorén-Aguilar +2
In old, dense stellar systems collisions of white dwarfs are a rather frequent phenomenon. Here we present the results of a comprehensive set of Smoothed Particle Hydrodynamics sim…
Magnetic white dwarfs with debris discs
Baybars Külebi, K. Yavuz Ekşi, Pablo Lorén-Aguilar +2
It has long been accepted that a possible mechanism for explaining the existence of magnetic white dwarfs is the merger of a binary white dwarf system, as there are viable mechanis…
Magnetic white dwarfs with debris disks
Baybars Külebi, K. Yavuz Ekşi, Pablo Lorén-Aguilar +2
It has long been accepted that a possible mechanism for explaining the existence of magnetic white dwarfs is the merger of a binary white dwarf system, as there are viable mechanis…
Lithium production in the merging of white dwarf stars
Richard Longland, Pablo Lorén-Aguilar, Jordi José +2
The origin of R Coronae Borealis stars has been elusive for over 200 years. Currently, two theories for their formation have been presented. These are the Final Flash scenario, in…
Type Ia supernovae and the DD scenario
J. Isern, E. García-Berro, P. Lorén-Aguilar
Type Ia supernovae are thought to be the outcome of the thermonuclear explosion of a white dwarf in a close binary system. Two possible scenarios, not necessarily incompatible, hav…
White dwarf mergers and the origin of R Coronae Borealis stars
P. Lorén-Aguilar, R. Longland, J. José +3
We present a nucleosynthesis study of the merger of a 0.4 solar masses helium white dwarf with a 0.8 solar masses carbon-oxygen white dwarf, coupling the thermodynamic history of S…
An upper limit to the secular variation of the gravitational constant from white dwarf stars
Enrique García-Berro, Pablo Lorén-Aguilar, Santiago Torres +2
A variation of the gravitational constant over cosmological ages modifies the main sequence lifetimes and white dwarf cooling ages. Using an state-of-the-art stellar evolutionary c…
Time variation of G and αwithin models with extra dimensions
P. Loren-Aguilar, E. Garcia-Berro, J. Isern +1
We derive the formulae for the time variation of the gravitational "constant" G and of the fine structure "constant" αin various models with extra dimensions and analyze their cons…