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Inside this Book – A book on compact objects logically begins where a book on normal stellar evolution leaves off. Compact objects-white dwarfs, neutron stars, and black holes-are “born” when normal stars “die,” that is, when most of their nuclear fuel has been consumed. All three species of compact object differ from normal stars in two fundamentnl wnys. First, since they duiiot burn nuclear fuel, they cannot support themselves against gravitational collapse by generating thermal pressure. Instead, white dwarfs are supported by the pressure of degenerate electrons, whde neutron stars are supported largely by the pressure of degenerate neutrons. Black holes, on the other hand, are completely collapsed stars-that is, stars that could not find any means to hold back the inward pull of gravity and therefore collapsed to singularities. With the exception of the spontaneously radiating “mini” black holes with masses M less than 10’’ g and radii smaller than a fermi, all three compact objects are essentially static over the lifetime of the Universe. They represent the final stage of stellar evolution. The second characteristic distinguishing compact objects from normal stars is their exceedingly small size. Relative to normal stars of comparable mass, com- pact objects have much smaller radii and hence, much stronger surface gravitational fields. This fact is dramatically illustrated in Table 1.1 and Figure 1.1. Because of the enormous density range spanned by compact objects, their analysis requires a deep physical understanding of the structure of matter and the nature of interparticle forces over a vast range of parameter space. All four fundamental interactions (the strong and weak nuclear forces, electromagnetism.
Black Holes White Dwarfs and Neutron by Stuart L. Shapiro PDF : eBook Information
- Full Book Name – Black Holes White Dwarfs and Neutron
- Author of this Book – Stuart L. Shapiro
- Language – English
- Book Genre – Science
- Download Format – PDF
- Size – 25 MB
- eBook Pages – 661
- Price – Free