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Accretion Power in Astrophysics examines accretion as a source of energy in both binary star systems containing compact objects, and in active galactic nuclei. Assuming a basic knowledge of physics, the authors describe the physical processes at work in accretion discs and other accretion flows. The first three chapters explain why accretion is a source of energy, and then present the gas dynamics and plasma concepts necessary for astrophysical applications. The next three chapters then develop accretion in stellar systems, including accretion onto compact objects. Further chapters give extensive treatment of accretion in active galactic nuclei, and describe thick accretion discs. A new chapter discusses recently discovered accretion flow solutions. The third edition is greatly expanded and thoroughly updated. New material includes a detailed treatment of disc instabilities, irradiated discs, disc warping, and general accretion flows. The treatment is suitable for advanced undergraduates, graduate students and researchers.

Accretion (Astrophysics). --- Accretion (Astrophysics) --- Accrétion (Astrophysique)

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Astrophysics --- Galaxies --- Stars --- Accretion (Astrophysics) --- Disks (Astrophysics) --- Gravitational collapse. --- Etoiles --- Accrétion (Astrophysique) --- Disques (Astrophysique) --- Effondrement gravitationnel --- Formation. --- Formation --- Accretion (Astrophysics). --- Disks (Astrophysics). --- Accrétion (Astrophysique)

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The astrophysical process of accretion onto compact central objects is ubiquitous across the universe. The study of white dwarf stars has greatly expanded in recent years, and this book presents, from first principles, the physics of the accretion process onto white dwarfs. Among the resulting phenomena are isolated white dwarfs accreting interstellar gas and dust as they orbit the galactic center, white dwarfs accreting from the debris disks of tidally disrupted asteroids, comets and exoplanets in other exoplanetary systems, white dwarfs accreting from red giant winds in symbiotic variable stars, white dwarfs accreting from Roche lobe-detached main sequence stars, white dwarfs accreting in cataclysmic variables, helium accreting white dwarfs in the ultra-compact AM CVn binaries, accreting white dwarf explosions in classical novae and Type Ia supernovae, the cosmologically critical white dwarf supernovae that led to the discovery of the accelerating expansion of the universe and the existence of dark energy. This book is intended for advanced undergraduates, graduate students, astrophysicists who specialize in white dwarf studies as well as non-specialist scientists.

White dwarf stars. --- Accretion (Astrophysics) --- Stars, New. --- Variable stars. --- Supernovae. --- Extrasolar planets. --- Naines blanches. --- Novae. --- Étoiles variables. --- Accrétion (astrophysique) --- Exoplanètes. --- Galaxies & stars. --- SCIENCE / Space Science / Astronomy.