PHENIICS Fest 2017

Session

Astrophysics and cosmology

May 31, 2017, 10:30 AM

Amphithéâtre Pierre Lehman (Laboratoire de l'Accélérateur Linéaire (LAL))

Description

Chairperson: Mr. Hélion Du Mas Des Bourboux

46. Allsky search for long duration gravitational waves detection

Mr Valentin FREY (LAL)

5/31/17, 10:30 AM

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...

57. The Cosmic Microwave Background

Mr Sylvain Vanneste (Laboratoire de l'accélérateur Linéaire, groupe Cosmologie)

5/31/17, 10:50 AM

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...

56. First measurement of the growth rate of structures with the SDSS-IV eBOSS DR14 quasar sample at z~1.5

Mrs Pauline Zarrouk (CEA-Saclay)

5/31/17, 11:10 AM

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...