firstname = "Domenec "
lastname = "Espriu"
email = "espriu@icc.ub.edu"
affiliation = "ICCUB-University of Barcelona"
city = "Barcelona"
country = "Spain"
visa = "yes"
passportname = "Domenec Espriu Climent"
birthday = "02.09.1957"
citizenship = "spain"
passportnumber = "AAD718697"
passportissued = "27.05.2011"
passportexpire = "27.05.021"
workplace = "Professor of Theoretical Physics, University of Barcelona"
workaddress = "Marti i Franques 1, 08028 Barcelona"
visadates = "29.09.2013 to 6.10.2013"
transfer = "yes"
talktitle = "Local measurement of $\lambda$ using pulsar timing arrays"
section = "C - Gravitation and cosmology"
talkabstract = "We have considered the propagation of gravitational waves in de Sitter space-
time and how a non-zero value of the cosmological constant might affect their detection
in pulsar timing arrays (PTA). If  the cosmological constant is non-zero waves are anharmonic 
in Friedmann-Robertson-Walker coordinates and although the amount of the anharmonicity 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 the cosmological constant."
comments = ""
submit = 0