Description
Chairperson: Mr. Hélion Du Mas Des Bourboux
M.
Valentin FREY
(LAL)
31/05/2017 10:30
Talk
From September 2015 to January 2016, Advanced LIGO conducted its first observation run (O1) with a sensitivity more than three times better than the initial detectors'. We describe a search for long duration gravitational wave transients in the O1 data. This complements the all-sky un-modelled transient search by looking for gravitational waves of durations of many hundreds of seconds. The...
M.
Sylvain Vanneste
(Laboratoire de l'accélérateur Linéaire, groupe Cosmologie)
31/05/2017 10:50
Talk
Physical Cosmology, as it is today understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s. One of the major theories that emerged was that of the Big-Bang. With it follows many predictions of behaviour and properties of our Univers. What is it size? its content? its age? Those are few of the...
Mme
Pauline Zarrouk
(CEA-Saclay)
31/05/2017 11:10
Talk
One of the biggest questions of contemporary cosmology is the origin of cosmic acceleration : does it arise from a constant vacuum energy as assumed in ΛCDM or from another form of dark energy that varies in time and space, or from a breakdown of general relativy on cosmological scales? To distinguish between these possibilities, one promising technique is to measure the growth rate of...
