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Astrophysics: Decoding the Cosmos is an accessible introduction to the key principles and theories underlying astrophysics.
This text takes a close look at the radiation and particles that we receive from astronomical objects, providing a thorough understanding of what this tells us, drawing the information together using examples to illustrate the process of astrophysics.
Chapters dedicated to objects showing complex processes are written in an accessible manner and pull relevant background information together to put the subject firmly into context.
The intention of the author is that the book will be a ‘tool chest’ for undergraduate astronomers wanting to know the how of astrophysics. Students will gain a thorough grasp of the key principles, ensuring that this often-difficult subject becomes more accessible.
Introduction:
Knowledge of our Universe has grown explosively over the past few decades, with discoveries of cometary objects in the far reaches of our Solar System, new-found planets around other stars, detections of powerful gamma ray bursts, galaxies in the process of formation in the infant Universe, and evidence of a mysterious force that appears to be accelerating the expansion of the Universe.
From exotic black holes to the microwave background, the modern understanding of our larger cosmological home could barely be imagined just a generation ago.
Headlines exclaim astonishing properties for astronomical objects stars with densities equivalent to the mass of the sun compressed to the size of a city, million degree gas temperatures, energy sources of incredible power, and luminosities as great as an entire galaxy from a single dying star.
How could we possibly have reached these conclusions? How can we dare to describe objects so inconceivably distant that the only influence they have on our lives is through our very astonishment at their existence?
With the exception of a few footprints on the Moon, no human being has ever ventured beyond the confines of the Earth. No spaceprobe has ever approached a star other than the Sun, let alone returned with material evidence. Yet we continue to amass information about our Universe and, indeed, to believe it. How?
About the Author:
Dr Judith Ann Irwin, Department of Physics, Queen’s University, Kingston Ontario, Canada
Contents:
PART I THE SIGNAL OBSERVED
1 Defining the signal
2 Measuring the signal
PART II MATTER AND RADIATION ESSENTIALS
3 Matter essentials
4 Radiation essentials
PART III THE SIGNAL PERTURBED
5 The interaction of light with matter
6 The signal transferred
7 The interaction of light with space
PART IV THE SIGNAL EMITTED
8 Continuum emission
9 Line emission
PART V THE SIGNAL DECODED
10 Forensic astronomy
Appendix A: Mathematical and geometrical relations
Appendix B: Astronomical geometry
Appendix C: The hydrogen atom
Appendix D: Scattering processes
Appendix E: Plasmas, the plasma frequency, and plasma waves
Appendix F: The Hubble relation and the expanding Universe
Appendix G: Tables and figures
About The Book:
Publisher : Wiley; 1st edition (June 5, 2007)
Language : English
Pages : 455
File : PDF, 8 MB
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