Galaxy Formation II Edition - Springer.pdf

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ASTRONOMY AND
ASTROPHYSICS LIBRARY
Series Editors:
G. Börner, Garching, Germany
A. Burkert, München, Germany
W. B. Burton, Charlottesville, VA, USA and
Leiden, The Netherlands
M. A. Dopita, Canberra, Australia
A. Eckart, Köln, Germany
T. Encrenaz, Meudon, France
E. K. Grebel, Heidelberg, Germany
B. Leibundgut, Garching, Germany
J. Lequeux, Paris, France
A. Maeder, Sauverny, Switzerland
V. Trimble, College Park, MD, and Irvine, CA, USA
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Malcolm S. Longair
Galaxy Formation
Second Edition
With 202 Figures and 20 Tables
123
Malcolm S. Longair
Jacksonian Professor of Natural Philosophy
Cavendish Laboratory
J. J. Thomson Avenue
Cambridge CH3 0HE
England, UK
e-mail: msl1000@cam.ac.uk
Cover image: Galaxies NGC 2207 and IC 2163. Credit: NASA and The Hubble Heritage Team (STScI); Hubble
Space Telescope WFPC2; STScI-PRC99-41; Source: http://heritage.stsci.edu/1999/41/index.html
Library of Congress Control Number: 2007935444
ISSN 0941-7834
ISBN 978-3-540-73477-2 Springer Berlin Heidelberg New York
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For Deborah, Mark and Sarah
Preface
This is the second edition of my book Galaxy Formation . Many people liked the first
edition which appeared in 1998, just before the explosion of magnificent new data
which have completely changed the face of astrophysical cosmology. Many of the
agonies which had to be gone through in the first edition have disappeared and, to
many people’s amazement, including mine, there is now a concordance model for
cosmology, the cosmologist’s equivalent of the particle physicist’s standard model .
Just like the standard model, however, the concordance model creates as many
problems as it solves. This is not a cause for concern, but rather one for celebration
because we are now able to ask much better and deeper questions than in the past.
These questions indicate clearly the need for physics and astrophysics ‘Beyond the
Concordance Model’.
The object of this new edition is to bring this amazing story up-to-date, very much
in the spirit of the first edition. To recapitulate some of the points made in the previous
preface about the origin of the book, I was asked by Springer-Verlag to expand the set
of lecture notes that I prepared in 1988 for the First Astrophysics School organised
by the European Astrophysics Doctoral Network into a full-length book. The set of
notes was entitled Galaxy Formation and was published as a chapter of the volume
Evolution of Galaxies: Astronomical Observations (eds. I. Appenzeller, H.J. Habing
and P. Lena, pages 1 to 93, Springer-Verlag Berlin, Heidelberg, 1989). In that chapter,
I attempted to bridge the gap between elementary cosmology and the technical papers
appearing in the literature which can seem quite daunting on first encounter. The
objective was to present the physical ideas and key results as clearly as possible as
an introduction and guide to the technical literature.
In 1993, more lecture notes on The Physics of Background Radiation were
prepared for the 23rd Advanced Course of the Swiss Society of Astrophysics
and Astronomy, the topic being The Deep Universe (A.R. Sandage, R.G. Kron
and M.S. Longair, Springer-Verlag Berlin, Heidelberg, 1995). Then, also in 1993,
I completed a history of twentieth century astrophysics and cosmology, which was
published as Chap. 23 of a three-volume work entitled Twentieth Century Physics
(eds. L.M. Brown, A. Pais and A.B. Pippard, IOP Publications, AIP Press Bris-
tol, and New York 1995). A much enlarged full-length book on this topic entitled
The Cosmic Century: A History of Astrophysics and Cosmology was published by
Cambridge University Press in 2006. That book brought the story of the origin of
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