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


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General programme, activity sheet

Friday 22 March, 2013 12:30 to 13:00 Conference
Magnetar oscillations
Speaker: Michael Gabler, University of Valencia

Authors: Michael Gabler


In a realistic model of magneto-elastic oscillations in magnetars, we find that crustal shear oscillations, often invoked as an explanation of quasi-periodic oscillations (QPOs) seen after giant flares in soft gamma-ray repeaters (SGRs), are damped by resonant absorption on timescales of at most 0.2s, for a lower limit on the dipole magnetic field strength of $5\times 10^{13}$G. At higher magnetic field strengths (typical in magnetars) the damping timescale is even shorter, as anticipated by earlier toy-models. We have investigated a range of equations of state and masses and if magnetars are dominated by a dipole magnetic field, our findings exclude torsional shear oscillations of the crust from explaining the observed low-frequency QPOs. In contrast, we find that the Alfv\'en QPO model is a viable explanation of observed QPOs, if the dipole magnetic field strength exceeds a minimum strength of about several times $10^{14}$G to $10^{15}$G. Then, Alfv\'en QPOs are no longer confined to the fluid core, but completely dominate in the crust region and have a maximum amplitude at the surface of the star.
Morning Sessions
Place: Salon Grados

Other activities in Morning Sessions
10:00 h. to 11:00 h.Conference

Alberto Lobo and the Strive for Gravitational Wave Astronomy

Speaker: Carlos F. Sopuerta, Institut de Ciencies de l'Espai (CSIC-IEEC), Researcher
11:00 h. to 11:30 h.Coffee break

12:00 h. to 12:30 h.Conference

General-relativistic neutrino leakage scheme and neutrino-induced collapse

Speaker: Filippo Galeazzi, University of Valencia
11:00 h. to 11:30 h.Conference

Local measurement of Λ using pulsar timing arrays

Speaker: Daniel  Puigdomènech, ICCUB, Professor
09:00 h. to 10:00 h.Conference

Gravitational waves from neutron stars: some recent developments

Speaker: Kostas Glampedakis, Universidad de Murcia


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