Searching for non-Gaussianity in observational cosmic microwave background data

2012 ◽  
Vol 55 (11) ◽  
pp. 1098-1114 ◽  
Author(s):  
Oleg V Verkhodanov
Keyword(s):  
Cosmic Microwave Background ◽  
Microwave Background ◽  
Background Data ◽  
Cosmic Microwave Background Data

scholarly journals Spherical needlets for cosmic microwave background data analysis

2007 ◽  
Vol 383 (2) ◽  
pp. 539-545 ◽  
Author(s):  
D. Marinucci ◽  
D. Pietrobon ◽  
A. Balbi ◽  
P. Baldi ◽  
P. Cabella ◽  
...  
Keyword(s):  
Data Analysis ◽  
Cosmic Microwave Background ◽  
Microwave Background ◽  
Background Data ◽  
Cosmic Microwave Background Data

Detecting Topology in a Nearly Flat Hyperbolic Universe

2003 ◽  
Vol 18 (30) ◽  
pp. 2099-2107 ◽  
Author(s):  
Jeffrey R. Weeks
Keyword(s):  
Cosmic Microwave Background ◽  
Microwave Background ◽  
Observable Universe ◽  
Multiply Connected ◽  
Background Data ◽  
Cosmic Microwave Background Data

Cosmic microwave background data shows the observable universe to be nearly flat, but leaves open the question of whether it is simply or multiply connected. Several authors have investigated whether the topology of a multiconnected hyperbolic universe would be detectable when 0.9<Ω<1. However, the possibility of detecting a given topology varies depending on the location of the observer within the space. Recent studies have assumed the observer sits at a favorable location. The present paper extends that work to consider observers at all points in the space, and (for given values of Ωm and ΩΛ and a given topology) computes the probability that a randomly placed observer could detect the topology. The computations show that when Ω=0.98 a randomly placed observer has a reasonable chance (~50%) of detecting a hyperbolic topology, but when Ω=0.99 the chances are low (<10%) and decrease still further as Ω approaches one.

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