Valencia from 20 to 22 March 2013
3rd Iberian Gravitational-Wave Meeting 2013


Home pageProgrammeCommitteeAccommodationVenueContact
General programme, activity sheet

Wednesday 20 March, 2013 16:30 to 17:00 Conference
Gravitational wave radiation from colliding white dwarfs
Speaker: Enrique Garcia-Berro, Universitat Politècnica de Catalunya, Professor

Authors: Enrique Garcia-Berro, Gabriela Aznar-Siguan, Pablo Loren-Aguilar


In old, dense stellar systems collisions of white dwarfs are a rather frequent phenomenon. We present the results of a comprehensive set of Smoothed Particle Hydrodynamics simulations of close encounters of white dwarfs aimed to explore the outcome of the interaction and the resulting gravitational wave patterns for different initial conditions. Depending on the initial conditions and the white dwarf masses, three different outcomes are possible. Specifically, the outcome of the interaction can be either a direct or a lateral collision or the interaction can result in the formation of an eccentric binary system. In those cases in which a collision occurs, the infalling material is compressed and heated and the physical conditions for a detonation are reached during the most violent phases of the merger in a significant number of simulations, whereas in some other, although some nuclear processing occurs in the region where the material of the disrupted less massive star hits the surface of the more massive one, the temperature increase in the shocked region rapidly lifts degeneracy, and the burning is quenched. We thus characterize under which circumstances a detonation is likely to occur as a result of the impact of the disrupted star on the surface of the more massive white dwarf. Finally, we also study which interactions result in bound systems, and in which ones the more massive white dwarf is also disrupted as a consequence of the dynamical interaction. In all cases we also compute the resulting gravitational wave emission.
Afternoon Sessions
Place: Salon Grados

Other activities in Afternoon Sessions
16:00 h. to 16:30 h.Conference

Testing the LISA Technology Package Diagnostics In Space Conditions

Speaker: Ferran Gibert, Institut de Ciències de l'Espai (CSIC-IEEC)), PhD student
15:30 h. to 16:00 h.Conference

Parameter estimation in LISA Pathfinder experiments

Speaker: Nikolaos Karnesis, CSIC-IEEC, PhD student
17:00 h. to 18:00 h.Conference

Charon: a new code for multidimensional radiation transport

Speaker: David Radice, Max Planck Institute for Gravitational Physics
18:00 h. to 18:30 h.Conference

Binary Neutron Star Mergers with Spin

Speaker: Wolfgang Kastaun, Albert Einstein Institute, Postdoctoral Researcher
15:00 h. to 15:30 h.Conference

A short review of the L2/L3 call and the underlying process

Speaker: Oliver Jennrich, ESA, Scientist
17:00 h. to 17:30 h.Coffee break



Organizers, sponsors, collaborators

    

ADEIT Fundació Universitat Empresa

Plaza Virgen de la Paz, 3 · E-46001 Valencia
Phone: +34 963 262 600 · Fax: +34 963 262 700