Download presentation

Presentation is loading. Please wait.

Published byDorothy Sleigh Modified over 3 years ago

1
A Quasar Based Search for Hypertorus Cosmology Dylan Menzies, Grant Mathews University of Notre Dame

2
General relativity says nothing about topology. Maybe 3D topology is not simply connected. Imposing a non-trivial topology can make a non-compact universe compact. In flat space 10 compact topologies are possible. Infinite non-zero compact constant-curvature topologies. Topological dimension scale? Cosmological 3D Topology

3
2-torus covering space globally homogenous The Hypertorus 3-torus fundamental domain

4
WMAP quadrupole and octopole Suppression and alignment Tegmark et al march 03 Hypertorus? Use to guide search (l,b) ~ (250°,60°) Hypertorus Evidence

5
Multipole Suppression

6
2D CMB methods –Multipole suppression, dT3 0.25 dSLS –Cornish circles, de Oliveira-Costa July 03, rules out T3 –Search for discrete modes could find dT3>1 dSLS eg Rocha 02 Weak bounds so far. Previous Results

7
3D quasar groups –Bounds weaker dT3 0.02 dSLS –Reliant on redshift –Dropout intolerant Previous Results

8
Locate axis without z Bidirectional –search up to dSLS Find direction pixels with high number of alignments. z-free test

9
Based on lambda =.7 +-.1, flat (WMAP) Exclude pair if | t1-t2 | >.5 billion yrs (reduces peculiar velocity error as well) Exclude if z1, z2, theta1, theta2 not well related. More Filters

10
d z-distance relation z

11
Pixel Track Illustration

12
Bin by calculated dT3, store max alignments and location of max in each bin. Repeat on several sets decorrelated by random z- redistribution. Use mean and deviation of the bins in these sets as null hypothesis. More Sensitivity

13
0.01 deg resolution, 20x30 deg search dT3 bin spacing = 0.002 dSLS 2nd peak suggests dT3 =.38 dSLS, axis = (273.7, 59.1) But decorrelated data not consistent. Results

14
Sensitive to dropout of below 0.01 over much of dT3 range Results

Similar presentations

OK

WMAP CMB Conclusions A flat universe with a scale-invariant spectrum of adiabatic Gaussian fluctuations, with re-ionization, is an acceptable fit to the.

WMAP CMB Conclusions A flat universe with a scale-invariant spectrum of adiabatic Gaussian fluctuations, with re-ionization, is an acceptable fit to the.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on semiconductor diodes Ppt on hard gelatin capsule manufacturers Small ppt on save water Ppt on forms of business organisation Ppt on conservation of wildlife and natural vegetation regions Presenter notes in microsoft ppt online Ppt on art and craft movement Ppt on the road not taken poem Seminar ppt on mind reading computer Ppt on central government of india