Accelerated Cosmic Expansion

2013-11-29 Science

Author : Claudia Moreno González
Release : 2013-11-29
Genre : Science
Kind : eBook
Book Rating : 633/5 ( reviews)

GET EBOOK

Book Synopsis Accelerated Cosmic Expansion by : Claudia Moreno González

Download or read book Accelerated Cosmic Expansion written by Claudia Moreno González. This book was released on 2013-11-29. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings from the 2012 Fourth International Meeting on Gravitation and Cosmology, focusing on accelerated cosmic expansion This volume provides both an update and a review of the state of alternative theories of gravity in connection with the accelerated expansion of the universe issue. Different theoretical proposals exist to explain the acceleration in the cosmic expansion, generating the dark energy issue and opening the possibility to theories of gravity alternative to general relativity. Related issues such as the dark matter problem are also surveyed in order to give the readers profound insight on the subject from different points of view. Comprised of short talks and plenary lectures given by leading experts in the field, some of them with brilliant and historic contributions, the book allows the reader to find readable and referenced surveys in topics like f(R) theories, the dark matter and dark energy issues, Modified Newtonian Dynamics (MOND) scenarios, f(T) theories, scalar-tensor theories derived from non-Riemannian geometries, emergent universes, the cosmological constant and other topics of current interest for younger and senior physicists and graduate students. These proceedings are from the Fourth International Meeting on Gravitation and Cosmology, held in Guadalajara, Jalisco, México, from 20 - 25 May, 2012, was sponsored by ICTP- Trieste, Italy and COECyTJAL-Universidad de Guadalajara, México. This event is a series of scientific meetings started in 2004 in Cuba, focusing on current and selected topics in the fields of gravitation and cosmology.

Expansion of the Universe

Science

Author : Steff Jaywan
Release :
Genre : Science
Kind : eBook
Book Rating : /5 ( reviews)

GET EBOOK

Book Synopsis Expansion of the Universe by : Steff Jaywan

Download or read book Expansion of the Universe written by Steff Jaywan. This book was released on . Available in PDF, EPUB and Kindle. Book excerpt: The universe is a vast and enigmatic expanse, filled with countless mysteries that have intrigued scientists and philosophers for centuries. One of the most profound discoveries of modern cosmology is that the universe is not only expanding but doing so at an accelerating rate. This revelation has reshaped our understanding of the cosmos and introduced the concept of dark energy as a dominant force driving this acceleration. In this book, we embark on a journey through the history of cosmological thought, from the early observations that hinted at an expanding universe to the groundbreaking discoveries that revealed its acceleration. We will explore the role of the cosmological constant, a term introduced by Einstein in his equations of General Relativity, which has come to be associated with dark energy. We begin with a foundational understanding of the universe's expansion, delving into the Big Bang theory and the key observations that support it. From there, we examine the pivotal role of the cosmological constant and its implications for the structure and fate of the universe. As we navigate through the complexities of dark energy and its various theoretical models, we will also address the challenges and alternative theories that scientists are exploring to explain this cosmic acceleration. Finally, we will consider the future of cosmological research, highlighting the ongoing quests to unravel the mysteries that still elude us.

STUDY OF ACCELERATED COSMIC EXPANSION

2022-08-09 Science

Author : Nisha Rani
Release : 2022-08-09
Genre : Science
Kind : eBook
Book Rating : 699/5 ( reviews)

GET EBOOK

Book Synopsis STUDY OF ACCELERATED COSMIC EXPANSION by : Nisha Rani

Download or read book STUDY OF ACCELERATED COSMIC EXPANSION written by Nisha Rani. This book was released on 2022-08-09. Available in PDF, EPUB and Kindle. Book excerpt: Physical cosmology includes the scientific study of the origin, evolution and dynamics of the universe. Due to impressive progress both on the theoretical and observational side, scientists are able to resolve many of the puzzles of the universe. Nevertheless, many questions are not answered completely. For instance, "What are the constituents of the universe?" and "How does the dynamics of the universe evolve?" The curiosity to get convincing answers to these questions, motivates one to work in this field. According to the hot Big Bang model, the universe started from a bang and its properties change with time. The discovery of the Cosmic Microwave Background Radiation (CMBR) by Penzias and Wilson in 1965 was important in making the Big Bang model the accepted model of the universe [5]. A landmark discovery in 1998 by two groups working independently on Supernovae Ia was instrumental in changing the way we understand our universe. They found that the expansion of the universe is accelerating [6, 7]. To explain the accelerated expansion of the universe, various models have been proposed. The most widely accepted one is the Lambda Cold Dark Matter (ΛCDM) model [8]. According to this model, the universe is flat and is expanding at an accelerated rate. It is composed of baryonic matter, dark matter and dark energy. Dark energy is the name given to the cause of the cosmic acceleration.

The Accelerating Expansion of the Universe

2017-07-15

Author : Paul F. Kisak
Release : 2017-07-15
Genre :
Kind : eBook
Book Rating : 395/5 ( reviews)

GET EBOOK

Book Synopsis The Accelerating Expansion of the Universe by : Paul F. Kisak

Download or read book The Accelerating Expansion of the Universe written by Paul F. Kisak. This book was released on 2017-07-15. Available in PDF, EPUB and Kindle. Book excerpt: 11.3 billion years ago a star exploded. It is framed by the constellation Ursa Major. It was photographed in 1997 and it's impact on cosmology theory is still being felt. This exploding star is the Supernova 1997ff type Ia. The discovery and analysis of the radiation that emanates from SN 1997ff is providing support for the theory of "The Accelerating Expansion of our Universe," "Dark Matter," and "Dark Energy." The Hubble discovery also reveals that the universe only recently began speeding up, a discovery that suggests the universe is expanding more quickly than in the past, but there were alternate explanations. The accelerating expansion of the universe is the observation that the universe appears to be expanding at an increasing rate, so that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time. The accelerated expansion was discovered in 1998, by two independent projects, the Supernova Cosmology Project and the High-Z Supernova Search Team, which both used distant type Ia supernovae as standard candles to measure the acceleration. The expansion of the universe is thought to have been accelerating since the universe entered its dark-energy-dominated era roughly 5 billion years ago. Within the framework of general relativity, an accelerating expansion can be accounted for by a positive value of the cosmological constant (Lambda), equivalent to the presence of a positive vacuum energy, dubbed "dark energy." While there are alternative possible explanations, the description assuming dark energy (positive Lambda) is used in the current standard model of cosmology, which also includes cold dark matter (CDM) and is known as the Lambda-CDM model. This book focuses on our Accelerating universe and the theories that support it.This book is designed to be a state of the art, superb academic reference work and provide an overview of the topic and give the reader a structured knowledge to familiarize yourself with the topic at the most affordable price possible. The accuracy and knowledge is of an international viewpoint as the edited articles represent the inputs of many knowledgeable individuals and some of the most current knowledge on the topic, based on the date of publication.

Lectures on Cosmology

2010-03-10 Science

Author : Georg Wolschin
Release : 2010-03-10
Genre : Science
Kind : eBook
Book Rating : 98X/5 ( reviews)

GET EBOOK

Book Synopsis Lectures on Cosmology by : Georg Wolschin

Download or read book Lectures on Cosmology written by Georg Wolschin. This book was released on 2010-03-10. Available in PDF, EPUB and Kindle. Book excerpt: The lectures that four authors present in this volume investigate core topics related to the accelerated expansion of the Universe. Accelerated expansion occured in the ?36 very early Universe – an exponential expansion in the in ationary period 10 s after the Big Bang. This well-established theoretical concept had rst been p- posed in 1980 by Alan Guth to account for the homogeneity and isotropy of the observable universe, and simultaneously by Alexei Starobinski, and has since then been developed by many authors in great theoretical detail. An accelerated expansion of the late Universe at redshifts z

Popular eBooks

Accelerated Cosmic Expansion

Expansion of the Universe

STUDY OF ACCELERATED COSMIC EXPANSION

The Accelerating Expansion of the Universe

Lectures on Cosmology

You may also like...