Tesla Jeltema
(University of California, Santa Cruz)
10/09/2013, 14:00
Cosmology
Oral
During fall 2012 the Dark Energy Survey (DES) collaboration
installed and commissioned DECam, a 570 mega-pixel optical and
near-infrared camera with a large 3 sq. deg. field of view,
set at the prime focus of the 4-meter Blanco telescope in
CTIO, Chile. In the course of the next five years DECam will
map an entire octant of the southern sky to unprecedented
depth, measuring the position...
Dr
Nathalie Palanque-Delabrouille
(CEA)
10/09/2013, 14:20
Cosmology
Oral
SDSS-III/BOSS is a 5-year spectroscopic program dedicated to the study of dark energy. The observations started in 2009 on the 2.5m telescope at Apache Point Observatory in New Mexico. The foreseen footprint covers a total of 10,000 square degrees. The survey will consist of 1.5 million LRG galaxies and 160,000 quasars, with mean redshifts z=0.6 and z=2.5 respectively. In this talk, I will...
Dr
Carlos Cunha
(Stanford University)
10/09/2013, 14:40
Cosmology
Oral
Upcoming large area photometric surveys face many challenges. I will discuss two of the major issues: photometric redshifts and angular selection uncertainties.
Because of the intrinsic inaccuracy of photo-z's, they cannot be used directly in cosmological analysis unless their uncertainties are precisely quantified. I will discuss recent results on spectroscopic follow-up requirements and...
Miguel Rocha
(UC Irvine)
10/09/2013, 15:00
Cosmology
Oral
We use cosmological simulations to study the effects of self-interacting dark matter (SIDM) on the density profiles, substructure counts and shapes of dark-matter haloes from the scales of spiral galaxies to galaxy clusters, focusing explicitly on models with cross-sections over dark-matter particle mass σ/m = 1 and 0.1 cm2 g-1. Our simulations rely on a new SIDM N-body algorithm that is...
A.D. Dolgov
(INFN, Ferrara)
10/09/2013, 15:20
Cosmology
Oral
A mechanism for generation of large scale magnetic fields at recombination epoch is considered. Due to rotation of a protogalaxy a circular electric current can be generated because of interaction of galactic electrons with hypothetical light dark matter particles possessing a small electric charge. The induced current may be sufficiently strong to create the observed magnetic field at...
