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The Evolution of the Universe: A comparison of fractal structure of WMAP - Couverture souple

Wu, Yongfeng

 
9783639180763: The Evolution of the Universe: A comparison of fractal structure of WMAP
Couverture souple
ISBN 10 : 3639180763 ISBN 13 : 9783639180763
Editeur : VDM Verlag, 2009

Synopsis

The value of the fractal dimension D of the universe is important for us to understand the evolution of the universe. Many methods have been developed to get the fractal dimension. To supplement the widely used methods, here we generalize the Metric Space Technique (MST), a tool used to analyze and classify astrophysical maps and perform a multi-scale analysis and get the fractal dimension of the early and current universe. We consider a wide range of smoothing levels for multi-scale filtering. By varying the size of the smoothing function over a range of scales, exactly like the wavelet transform, it becomes possible for a complete multi-scale description of galaxy distributions to get the fractal dimension in metric space. We find that the early universe has a clear fractal structure (D~1.45) but the current universe is more homogeneous (D~1.15). We think that gravitation force decreases the fractal dimension of the universe when the universe evolves.

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Présentation de l'éditeur

The value of the fractal dimension D of the universe is important for us to understand the evolution of the universe. Many methods have been developed to get the fractal dimension. To supplement the widely used methods, here we generalize the Metric Space Technique (MST), a tool used to analyze and classify astrophysical maps and perform a multi-scale analysis and get the fractal dimension of the early and current universe. We consider a wide range of smoothing levels for multi-scale filtering. By varying the size of the smoothing function over a range of scales, exactly like the wavelet transform, it becomes possible for a complete multi-scale description of galaxy distributions to get the fractal dimension in metric space. We find that the early universe has a clear fractal structure (D~1.45) but the current universe is more homogeneous (D~1.15). We think that gravitation force decreases the fractal dimension of the universe when the universe evolves.

Biographie de l'auteur

Yongfeng Wu was born in Mainland China in 1979. He came to the United States to pursue his PHD in physics in 2004. His advisors are Dr. David J. Batuski in physics Department and Dr. Andre Khalil in Mathematics Department at University of Maine.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
VDM Verlag
Date d'édition
2009
Langue
anglais
ISBN 10 
3639180763
ISBN 13 
9783639180763
Reliure
Broché
Nombre de pages
88
Coordonnées du fabricant
non disponible
Personne responsable
non disponible