CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 4847 > Article
Paper
19 December 2002 Multiscale Methods Performances to Detect Cosmological non-Gaussian Signatures
Jean-Luc Starck, Nabila Aghanim, Olivier Forni
Author Affiliations +
Proceedings Volume 4847, Astronomical Data Analysis II; (2002) https://doi.org/10.1117/12.461022
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States
Abstract
One of the goals in cosmology is to understand the formation and evolution of the structures resulting from the growth of initial density perturbations. Recent Cosmic Microwave Background (CMB)observations indicate that these pertubations essentially came out of Gaussian distributed quantum fluctuations in the inflationary scenario. However, topological defects (e.g. cosmic strings) could contribute to the signal. One of their important footprints would be the predicted non-Gaussian distribution of the temperature anisotropies. In addition, other sources of non-Gaussian signatures do contribute to the signal, in particular the Sunyaev-Zel'dovich effect of galaxy clusters. In this general context and motivated by the future CMB experiments, the question we address is to search for, and discriminate between, different non-Gaussian signatures. To do so, we analyze simulated maps of the CMB temperature anisotropies using both wavelet and curvelet transforms. Curvelets take the form of basis elements which exhibit very high directional sensitivity and are highly anisotropic, which is not the case for wavelets. The sensitivity of both methods is evaluated using simulated data sets.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Jean-Luc Starck, Nabila Aghanim, and Olivier Forni "Multiscale Methods Performances to Detect Cosmological non-Gaussian Signatures", Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); https://doi.org/10.1117/12.461022
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 12 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Wavelets
Transform theory
Wavelet transforms
Mirrors
Anisotropy
Galaxy groups and clusters
Computer simulations
RELATED CONTENT
Use of the wavelet transform for signal detection
Proceedings of SPIE (August 27 1993)
Research on denoising laser remote exploration signal based on wavelet...
Proceedings of SPIE (February 02 2006)
Wavelets and curvelets on the sphere for polarized data
Proceedings of SPIE (September 20 2007)
Variations on Hough-wavelet transforms for time-frequency chirp detection
Proceedings of SPIE (November 13 2003)
Supertransients in fluid flow noise
Proceedings of SPIE (September 01 1995)
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top