Includes bibliographical references and index.

Physics of Neutron Stars

The book gives an extended review of theoretical and observational aspects of neutron star physics. With masses comparable to that of the Sun and radii of about ten kilometres, neutron stars are the densest stars in the Universe. This book describes all layers of neutron stars, from the surface to the core, with the emphasis on their structure and equation of state. Theories of dense matter are reviewed, and used to construct neutron star models. Hypothetical strange quark stars and possible exotic phases in neutron star cores are also discussed. Also covered are the effects of strong magnetic fields in neutron star envelopes.

Neutron stars are gold mines for the study of nuclear systems under extreme conditions of density and isospin asymmetry. Spanning many orders of magnitude in density and pressure, neutron stars display exotic phases that cannot be realized under normal laboratory conditions. Whereas the most common perception of a neutron star is that of a uniform system of neutrons packed to densities that may exceed that of normal nuclei, the reality is far more complex and much more interesting. To illustrate this more exciting reality, the editors of this book contacted leaders in the field of neutron-star physics with expertise ranging from nuclear structure to stellar dynamics. They asked each expert to communicate the successes of the past and the challenges of the future in a way that will continue to foster dialogue and promote collaborations between the astrophysics and the nuclear physics communities.

This book summarizes the recent progress in the physics and astrophysics of neutron stars and, most importantly, it identifies and develops effective strategies to explore, both theoretically and observationally, the many remaining open questions in the field. Because of its significance in the solution of many fundamental questions in nuclear physics, astrophysics and gravitational physics, the study of neutron stars has seen enormous progress over the last years and has been very successful in improving our understanding in these fascinating compact objects. The book addresses a wide spectrum of readers, from students to senior researchers. Thirteen chapters written by internationally renowned experts offer a thorough overview of the various facets of this interdisciplinary science, from neutron star formation in supernovae, pulsars, equations of state super dense matter, gravitational wave emission, to alternative theories of gravity. The book was initiated by the European Cooperation in Science and Technology (COST) Action MP1304 “Exploring fundamental physics with compact stars” (NewCompStar).

“In science fiction there is only a handful of books that stretch the mind—and this is one of them.”—Arthur C. Clarke In a moving story of sacrifice and triumph, human scientists establish a relationship with intelligent lifeforms—the cheela—living on Dragon’s Egg, a neutron star where one Earth hour is equivalent to hundreds of their years. The cheela culturally evolve from savagery to the discovery of science, and for a brief time, men are their diligent teachers. Praise for Dragon’s Egg “Bob Forward writes in the tradition of Hal Clement’s Mission of Gravity and carries it a giant step (how else?) forward.”—Isaac Asimov “Dragon’s Egg is superb. I couldn’t have written it; it required too much real physics.”—Larry Niven “This is one for the real science-fiction fan.”—Frank Herbert “Robert L. Forward tells a good story and asks a profound question. If we run into a race of creatures who live a hundred years while we live an hour, what can they say to us or we to them?”—Freeman J. Dyson “Forward has impeccable scientific credentials, and . . . big, original, speculative ideas.”—The Washington Post

Neutron stars, the ultra-dense remnants of exploded stellar giants, are among the most fascinating objects in the cosmos. Katia Moskvitch introduces readers to their astonishing qualities and follows the scientists who are discovering what neutron stars can tell us about the mysteries of dark matter, black holes, and general relativity.