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On sait depuis longtemps que les étoiles sont des astres semblables au Soleil ; mais ce n'est qu'en 1810 que l'on a vu qu'elles sont faites de gaz incandescent. À partir de 1860, on a déterminé progressivement la composition chimique de ce gaz. Vers 1940, on a enfin compris que l'énergie des étoiles était thermonucléaire, et su comment elles la rayonnaient. Quant à leur évolution, elle a fait depuis cette époque l'objet d'une quête progressive que l'on peut considérer comme à peu près terminée. Enfin, ce n'est que tout récemment que l'on a commencé à comprendre comment les étoiles se forment à partir de la matière interstellaire et comment a lieu la mort violente des étoiles massives. Les étoiles doubles serrées sont le siège de phénomènes extraordinaires que l'on n'a pas fini d'explorer. Le présent ouvrage fait le point sur tous ces aspects, tandis que l'impact de l'évolution des étoiles sur celle des galaxies est également abordé. Les observations les plus intéressantes sont rappelées, illustrées par des images souvent spectaculaires, tandis que la théorie est expliquée de façon simple, sans cependant éviter quelques développements mathématiques et physiques lorsqu'ils sont indispensables à une compréhension réelle des phénomènes. Ainsi, sans être un traité pour spécialistes, ce livre sera lu avec profit par les personnes qui possèdent des bases scientifiques du niveau de la licence, et qui veulent s'initier en profondeur au monde fascinant des étoiles.

Stars --- Stellar evolution --- Evolution --- Compact objects (Astronomy) --- Evolution.

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The diverse forms that stars assume in the course of their lives can all be derived from the initial conditions: the mass and the original chemical composition. In this textbook the basic concepts of stellar structure and the main roads of stellar evolution are described. The authors aim at reaching an understanding of stars and their evolution by both graduate students and astronomers who are not themselves investigating stars. Ample references to specialised review articles as well as to relevant research papers are included.

Stars. --- Stars --- Stellar evolution --- Evolution --- Compact objects (Astronomy) --- Sidereal system --- Galaxies --- Circumstellar matter --- Evolution.

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This text describes the microscopic physics operating in stars and demonstrates how stars respond from formation, through hydrogen-burning phases, up to the onset of helium burning. Intended for beginning graduate students and senior undergraduates with a solid background in physics, it illustrates the intricate interplay between the microscopic physical processes and the stars' macroscopic responses. The volume starts with the gravitationally contracting phase which carries the star from formation to the core hydrogen-burning main sequence, through the main sequence phase, through shell hydrogen-burning phases as a red giant, up to the onset of core helium burning. Particular emphasis is placed on describing the gravothermal responses of stars to nuclear transformations in the interior and energy loss from the surface, responses which express the very essence of stellar evolution. The volume is replete with many illustrations and detailed numerical solutions to prepare the reader to program and calculate evolutionary models.

Stars --- Stellar dynamics --- Etoiles --- Evolution --- Stellar dynamics. --- Dynamics, Stellar --- Celestial mechanics --- Stellar evolution --- Compact objects (Astronomy) --- Evolution. --- Dynamics

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Studies of stellar formation in galaxies have a profound impact on our understanding of the present and the early universe. The book describes complex physical processes involved in the creation of stars and during their young lives. It illustrates how these processes reveal themselves from radio wavelengths to high energy X-rays and gamma -rays, with special reference towards high energy signatures. Several sections devoted to key analysis techniques demonstrate how modern research in this field is pursued.

Stars --- Formation. --- Evolution. --- Stellar evolution --- Evolution --- Compact objects (Astronomy) --- Birth, Stellar --- Formation, Star --- Formation, Stellar --- Stellar birth --- Stellar formation --- STARS --- EVOLUTION --- FORMATION

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This book is a natural follow-up and extension of the recent publication ""The Big Bang: Theory, Assumptions and Problems"", (Eds: O'Connell and Hale, 2012, Nova Publications). The authors of the present work deliver an account of current research on the subject of the astrophysical and nuclear physics aspects of the evolution of the universe. They present a general overview of both the theoretical and experimental knowledge of nuclear physics and astrophysics necessary for the understanding of stellar structure and evolution of stars and galaxies. This account is followed by a discussion of d

Nuclear astrophysics --- Stars --- Astrophysique nucléaire --- Etoiles --- Evolution --- Nuclear astrophysics. --- Evolution. --- Astrophysique nucléaire --- Stellar evolution --- Compact objects (Astronomy) --- Astrophysics --- Nuclear physics