A Multiwavelength Study of the Epoch of Reionization Through Intensity Fluctuations

2016

Author : Ketron Mitchell-Wynne
Release : 2016
Genre :
Kind : eBook
Book Rating : 462/5 ( reviews)

Book Synopsis A Multiwavelength Study of the Epoch of Reionization Through Intensity Fluctuations by : Ketron Mitchell-Wynne

Download or read book A Multiwavelength Study of the Epoch of Reionization Through Intensity Fluctuations written by Ketron Mitchell-Wynne. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: The diffuse cosmological background light that pervades our Universe continues to be one of the best probes to uncover the astrophysical environments of the early Universe. In our attempt to gain a more holistic understanding of our present cosmological situation, we seek to understand the formation and evolution of the first stars and galaxies that came into existence. It is thought that these first-light galaxies are the progenitors to our Milky Way, and all other evolved galaxies. The spatial fluctuations of the extragalactic background light trace the total emission from all stars and galaxies in the Universe, and these first-light galaxies have left a measurable imprint on the cosmic infrared backgroud (CIB) light. In the first part of this thesis I describe measurements which suggest a detection of this signal, using a large subset of data from the largest allocation of Hubble time to date (CANDELS). This is followed by a cross-correlation analysis of the CIB with the cosmic X-ray background (CXB), which can give some insight as to whether or not X-ray emitting sources were present during this first-light epoch. I then shift towards the far-infrared (submillimeter) regime and discuss a statistical measurement of the redshift distribution of Herschel galaxies. Finally I show two-point correlation measurements of strongly lensed submillimeter galaxies, and the bias that this population may be introducing into past and current clustering analyses, which can lead to erroneous dark matter halo mass measurements from such studies.

Cosmic Magnetism,

1986 Art

Author : Percy Seymour
Release : 1986
Genre : Art
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Cosmic Magnetism, by : Percy Seymour

Download or read book Cosmic Magnetism, written by Percy Seymour. This book was released on 1986. Available in PDF, EPUB and Kindle. Book excerpt: The study of extraterrestrial magnetic fields is a relatively new one, confirmation of the existance of the first such field (that of our Sun) having come a s late as 1908. In the past 30 years a great ammount of knowledge has been accumulated on Cosmic Magnetism, which has turned out to be a truly fascinating topic for study. Percy Seymour's book is the first to deal with the topic in a non-mathematical way, and he offers a fine introduction to his subject. The first three chapters consolidate our knowledge on magnetism in general and the magnetic field of the Earth, as well as discussing the reasons for studying astronomy and cosmic magnetism in particular. The remainder of the book is devoted to the main areas of cosmic magnetism - solar, plantetary and interplanetary fields, fields in stars and pulsars, fields of the milky way and fields in other galaxies. Cosmic Magnetism in an ideal book for sixth-formers and undergraduates studying physics or astronomy and will also appeal to amateur astronomers. as previous work on this topic has been 'hidden' in specialised academic journals.

New Worlds, New Horizons in Astronomy and Astrophysics

2011-02-04 Science

Author : National Research Council
Release : 2011-02-04
Genre : Science
Kind : eBook
Book Rating : 994/5 ( reviews)

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Book Synopsis New Worlds, New Horizons in Astronomy and Astrophysics by : National Research Council

Download or read book New Worlds, New Horizons in Astronomy and Astrophysics written by National Research Council. This book was released on 2011-02-04. Available in PDF, EPUB and Kindle. Book excerpt: Driven by discoveries, and enabled by leaps in technology and imagination, our understanding of the universe has changed dramatically during the course of the last few decades. The fields of astronomy and astrophysics are making new connections to physics, chemistry, biology, and computer science. Based on a broad and comprehensive survey of scientific opportunities, infrastructure, and organization in a national and international context, New Worlds, New Horizons in Astronomy and Astrophysics outlines a plan for ground- and space- based astronomy and astrophysics for the decade of the 2010's. Realizing these scientific opportunities is contingent upon maintaining and strengthening the foundations of the research enterprise including technological development, theory, computation and data handling, laboratory experiments, and human resources. New Worlds, New Horizons in Astronomy and Astrophysics proposes enhancing innovative but moderate-cost programs in space and on the ground that will enable the community to respond rapidly and flexibly to new scientific discoveries. The book recommends beginning construction on survey telescopes in space and on the ground to investigate the nature of dark energy, as well as the next generation of large ground-based giant optical telescopes and a new class of space-based gravitational observatory to observe the merging of distant black holes and precisely test theories of gravity. New Worlds, New Horizons in Astronomy and Astrophysics recommends a balanced and executable program that will support research surrounding the most profound questions about the cosmos. The discoveries ahead will facilitate the search for habitable planets, shed light on dark energy and dark matter, and aid our understanding of the history of the universe and how the earliest stars and galaxies formed. The book is a useful resource for agencies supporting the field of astronomy and astrophysics, the Congressional committees with jurisdiction over those agencies, the scientific community, and the public.

Observational Astrophysics

2013-03-09 Science

Author : Pierre Lena
Release : 2013-03-09
Genre : Science
Kind : eBook
Book Rating : 54X/5 ( reviews)

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Book Synopsis Observational Astrophysics by : Pierre Lena

Download or read book Observational Astrophysics written by Pierre Lena. This book was released on 2013-03-09. Available in PDF, EPUB and Kindle. Book excerpt: For the last twenty years astronomy has been developing dramatically. Until the nineteen-fifties, telescopes, spectrometers, and photographic plates consti tuted a relatively simple set of tools which had been refined to a high degree of perfection by the joint efforts of physicists and astronomers. Indeed these tools helped at the birth of modern astrophysics: the discovery of the expan sion of the Universe. Then came radioastronomy and the advent of electronics; the last thirty years have seen the application to astrophysics of a wealth of new experimental techniques, based on the most advanced fields of physics, and a constant interchange of ideas between physicists and astronomers. Last, but not least, modern computers have sharply reduced the burden of dealing with the information painfully extracted from the skies, whether from ever scarce photons, or from the gigantic data flows provided by satellites and large telescopes. The aim of this book is not to give an extensive overview of all the tech niques currently in use in astronomy, nor to provide detailed instructions for preparing or carrying out an astronomical project. Its purpose is methodologi cal: photons are still the main carriers of information between celestial sources and the observer. How we are to collect, sample, measure, and store this infor mation is the unifying theme of the book. Rather than the diversity of tech niques appropriate for each wavelength range, we emphasize the physical and mathematical bases which are common to all wavelength regimes.

The First Galaxies in the Universe

2013-01-15 Science

Author : Abraham Loeb
Release : 2013-01-15
Genre : Science
Kind : eBook
Book Rating : 923/5 ( reviews)

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Book Synopsis The First Galaxies in the Universe by : Abraham Loeb

Download or read book The First Galaxies in the Universe written by Abraham Loeb. This book was released on 2013-01-15. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive, self-contained introduction to one of the most exciting frontiers in astrophysics today: the quest to understand how the oldest and most distant galaxies in our universe first formed. Until now, most research on this question has been theoretical, but the next few years will bring about a new generation of large telescopes that promise to supply a flood of data about the infant universe during its first billion years after the big bang. This book bridges the gap between theory and observation. It is an invaluable reference for students and researchers on early galaxies. The First Galaxies in the Universe starts from basic physical principles before moving on to more advanced material. Topics include the gravitational growth of structure, the intergalactic medium, the formation and evolution of the first stars and black holes, feedback and galaxy evolution, reionization, 21-cm cosmology, and more. Provides a comprehensive introduction to this exciting frontier in astrophysics Begins from first principles Covers advanced topics such as the first stars and 21-cm cosmology Prepares students for research using the next generation of large telescopes Discusses many open questions to be explored in the coming decade

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