One well known problem of the standard cosmological constant model is the tension between the high level of clustering observed in the CMB and the one obtained from large-scale structures. This may be an indication that the way dark energy affects clustering might differ from a simple cosmological constant. If dark energy actually couples to dark matter, then the way matter clusters will be altered. A model of coupled quintessence, where dark energy is modeled by a scalar field, is a specific example of how this can be achieved. Using redshift distortion data, we can constrain the coupling between dark matter and dark energy, and show that when a coupling is present the tension with CMB is removed. The data also agrees with the weak lensing results from the KIDS-450 survey. Future missions like SKA and Euclid will be able to distinguish between these models and a simple cosmological constant.
Is dark energy really constant?
Next Journal Club
Session to be resumed.
Black Hole Workshops
XI Black Holes Workshop, Lisbon, 2018
17-18 December 2018
Previous workshops in the series:
I Black Holes Workshop, Porto, 2008
II Black Holes Workshop, Lisbon, 2009
III Black Holes Workshop, Minho, 2010
IV Black Holes Workshop, Aveiro, 2011
V Black Holes Workshop, Lisbon, 2012
VI Black Holes Workshop, Minho 2013
VII Black Holes Workshop, Aveiro 2014
VIII Black Holes Workshop, Lisbon 2015
IX Black Holes Workshop, Minho 2016
X Black Holes Workshop, Aveiro 2017
NRHEP Network Meetings
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
9-13 July 2012, Aveiro, Portugal
11-14 March 2013, Lisbon, Portugal
6-10 January 2014, Mississippi, USA
7-10 July 2015, Rome, Italy
28 Sep-2 Oct 2015, Belém, Brazil
Ph.D. and Post-doctoral opportunities
Contact us If you are interested in pursuing graduate studies/research in our group.
A list of scientific meetings, mostly in gravitational physics, in 2016.