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 11:00 to 11:30 Conference
Local measurement of Λ using pulsar timing arrays
Speaker: Daniel  Puigdomènech, ICCUB, Professor

Authors: Domènec Espriu, Daniel Puigdomènech

We have considered the propagation of gravitational waves (GW) in de Sitter spacetime and how a non-zero value of the cosmological constant might affect their detection in pulsar timing arrays (PTA). If Λ = 0 waves are anharmonic in Friedmann-Robertson-Walker coordinates and although the amount of this effect is very small it gives noticeable effects for GW originating in extragalactic sources such as spiraling black hole binaries. The results indicate that the timing residuals induced by gravitational waves from such sources in PTA would show a peculiar angular dependence with a marked enhancement around a particular value of the angle subtended by the source and the pulsars, depending mainly on the actual value of the cosmological constant and the distance to the source. The position of the peak could represent a gauge of the value of Λ. The enhancement that the new effect brings about could facilitate the first direct detection of gravitational waves while representing a local measurement of Λ.
Further information:

Submited paper (298 KB)

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
12:30 h. to 13:00 h.Conference

Magnetar oscillations

Speaker: Michael Gabler, University of Valencia
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