Unsolved Problems In Stellar Evolution

Autor: Mario Livio
Publisher: Cambridge University Press
ISBN: 9780521780919
File Size: 24,85 MB
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The most comprehensive and up-to-date survey available on stellar structure and evolution, with a special emphasis on currently unsolved problems.

Unsolved Problems In Stellar Physics

Autor: Richard J. Stancliffe
Publisher: Amer Inst of Physics
File Size: 18,98 MB
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This volume is comprised of a series of papers dealing with some of the current unsolved problems in the field of stellar physics. It is also a celebration of the contributions made to this subject by Prof. Douglas Gough. Topics discussed include: stars, interiors, stars: evolution, asteroseismology, helioseismology, and fluid dynamics. The book will appeal to researchers in the fields of helioseismology, asteroseismology, stellar evolution, stellar physics and fluid dynamics.

Unsolved Problems Of The Milky Way

Autor: Leo Blitz
Publisher: Springer Science & Business Media
ISBN: 9400916876
File Size: 56,43 MB
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Although the Milky Way is the most studied and best understood galactic system, there are many fundamental questions about our Galaxy that remain unanswered. This book concentrates on those questions which have the widest applicability in all of astrophysics, and for which answers are most likely to be forthcoming in the next few years. Is the Milky Way a barred spiral, and if so, what are its properties? Is the disk of the Milky Way axisymmetric and what does the answer tell us about its dynamical history? Is there a black hole at the center of the Galaxy? How far does the Galaxy extend? How much dark matter is there in the Milky Way system? And more.

Astronomical Applications Of Astrometry

Autor: Michael Perryman
Publisher: Cambridge University Press
ISBN: 0521514894
File Size: 49,42 MB
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An authoritative account of the contributions to science made by the Hipparcos satellite, for astronomers, astrophysicists and cosmologists.

Advances In Stellar Evolution

Autor: Robert T. Rood
Publisher: Cambridge University Press
ISBN: 9780521591843
File Size: 47,18 MB
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An up-to-date and wide-ranging review of how our understanding of stellar evolution has advanced in recent years.

Angular Momentum And Mass Loss For Hot Stars

Autor: L.A. Willson
Publisher: Springer Science & Business Media
ISBN: 9400921055
File Size: 37,98 MB
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Fundamental unsolved problems of stellar astrophysics include the effects of angular momentum on stellar structure and evolution, the nature and efficiency of the processes by which angular momentum is redistributed within and lost from stars, and the role that stellar rotation plays in enhancing or driving stellar mass loss. There appears to be a qualitative change in the nature and efficiency of these mechanisms near spectral type FO: hotter (more massive) stars typically retain more angular momentum at least until they reach the main sequence, while cooler stars typically spin down quickly. For the hotter stars, recent work suggests a strong link between the type of pulsation behavior, the mass loss rates, and the rotation velocity. If the same mechanisms are able to drive mass loss from the main sequence A stars, as has recently been proposed, then the current interpretations of a number of observations will be drastically affected: e. g. the ages of clusters may be incorrect by up to a factor of two, and the surface abundances of isotopes of He, Li and Be may no longer give constraints on cosmological nucleosynthesis. There are also effects on the evolution of the abundances of elements in the interstellar medium and on the general evolution of populations of stars. Thus the questions of the mechanisms of angular momentum and mass loss of stars more massive than the sun is important not only for stellar studies but for the foundations of much of modern astrophysics.

Evolutionary Processes In Binary And Multiple Stars

Autor: Peter Eggleton
Publisher: Cambridge University Press
ISBN: 1139456954
File Size: 67,74 MB
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Binary systems of stars are as common as single stars. Stars evolve primarily by nuclear reactions in their interiors, but a star with a binary companion can also have its evolution influenced by the companion. Multiple star systems can exist stably for millions of years, but can ultimately become unstable as one star grows in radius until it engulfs another. This volume, first published in 2006, discusses the statistics of binary stars; the evolution of single stars; and several of the most important kinds of interaction between two (and even three or more) stars. Some of the interactions discussed are Roche-lobe overflow, tidal friction, gravitational radiation, magnetic activity driven by rapid rotation, stellar winds, magnetic braking and the influence of a distant third body on a close binary orbit. A series of mathematical appendices gives a concise but full account of the mathematics of these processes.