Multiwavelength Analysis of Clusters of Galaxies
with August Evrard
Characterizing multiwavelength cluster finders algorithms and cluster mass calibration are two crucial issue in constraint cosmology. We are using simulations data to understand the correlation between dark matter halos (dark side of the Universe) and clusers (observable side of the Universe). The result of this work would help us to undestand upcoming data from DES and XMM-XXL survay better.
Related Journal Papers
Source Code
Status: in progress
Gravitational collapse in asymptotically AdS spacetimes
with Leopoldo Pando Zayas
The AdS/CFT correspondence was readily expanded to include field theories at finite temperature. In this context a field theory in equilibrium at finite temperature is dual to a black hole in asymptotically AdS spacetime. One very important development has been the establishment of the correspondence at the level of small fluctuations. More precisely, fluctuations of systems at equilibrium or weakly driven near equilibrium satisfy a universal relation known as the fluctuation-dissipation theorem which connects spontaneous fluctuations to the linear response. The search for similar relations for systems far from equilibrium has been an important problem for many years with applications in ion collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) and also in condensed matter physics. The AdS/CFT correspondence has successfully incorporated those near-equilibrium relations and is now posed to take the next step and tackle far-from-equilibrium phenomena. To study far-from-equilibrium phenomena one needs to study the evolution of Einsteins equation with appropriate boundary conditions. Therefore the study of gravitational collapse has emerged as one of the most interesting problems in the interface of the interests of various communities including, among others, the numerical relativity, string theory, high energy particle physics and condensed matter.
Related Journal Papers
A. Farahi, L. A. Pando Zayas; Gravitational Collapse, Chaos in CFT Correlators and the Information Paradox; Submited to PRL
Source Code
Status: in progress
A Dirty Holographic Superconductor
with Leopoldo Pando Zayas
We have studied the effects of disorder on a holographic superconductor by introducing a random chemical potential on the boundary. We find the critical temperature for superconductivity is enhanced in the presence of disorder.
If you are interested to look at or work with the simulations source code you may want to contact me or Leopoldo Pando Zayas.
Related Journal Papers
D. Arean, A. Farahi, L. A. Pando Zayas, I. Salazar Landea, A. Scardicchio; A Dirty Holographic Superconductor‎; Submited to PRL
Status: finished
Building Merger Trees in Warm Dark Matter Universes
with Andrew Benson
Dark matter halo merger trees provide the "backbone" within which calculations of galaxy formation take place. To understand how alternative models of dark matter, such as Warm Dark Matter, influence the process of galaxy formation and the abundance of dark matter structures around our own and other galaxies, it is necessary to build detailed merging histories of large numbers of dark matter halos. This will lead to the prospect of quantitative predictions for Warm Dark Matter universes which will be observationally testable by Omega. This project will develop an accurate merger tree algorithm for non-Cold Dark Matter universes, with an initial application to Warm Dark Matter. This algorithm will be built within the Galacticus galaxy formation code and will be calibrated against N-body simulations.
Related Journal Papers
Andrew J. Benson, Arya Farahi, Shaun Cole, Leonidas A. Moustakas, Adrian Jenkins, Mark Lovell, Rachel Kennedy, John Helly, Carlos Frenk; Dark Matter Halo Merger Histories Beyond Cold Dark Matter: I - Methods and Application to Warm Dark Matter; MNRAS; In Press