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The Physics and Dynamics of Planetary Nebulae

2013-04-09 Science
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Release : 2013-04-09
Genre : Science
Kind : eBook
Book Rating : 484/5 ( reviews)

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Book Synopsis The Physics and Dynamics of Planetary Nebulae by : Grigor A. Gurzadyan

Download or read book The Physics and Dynamics of Planetary Nebulae written by Grigor A. Gurzadyan. This book was released on 2013-04-09. Available in PDF, EPUB and Kindle. Book excerpt: Planetary nebulae are the classic subject of astrophysics. The physical pro cesses occurring in this highly ionized gaseous medium, the formation of emis sion lines in clearly specified conditions, the continuous emission extending from the far ultraviolet up to infrared and radio frequencies, the generation of exotic forms of radiation predicted by atomic physics, along with methods for deciphering the observed spectra and detecting physical and kinematic parameters of the radiating medium, etc. - all these problems form the solid foundations of the physical theory of gaseous nebulae. They are an essential part of the arsenal of powerful tools and concepts without which one cannot imagine understanding and interpreting the enormous diversity of processes taking place in the Universe - in gaseous envelopes surrounding the stars of various classes, from cool dwarfs and flare stars up to hot supergiants, as well as in stellar chromospheres and coronae, in atmospheres of unstable and anomalous stars, in circumstellar clouds and gaseous shells born in nova and supernova explosions, in diffuse nebulae and the interstellar medium, in interacting binary systems, in galaxies with emission lines, in quasars, etc. The last thirty years have seen a turning-point in our knowledge concern ing the very nature of planetary nebulae (PNs). The radio emission of PNs was discovered after it was predicted theoretically. On the other hand, the powerful infrared emission discovered both in the continuum and in emission lines was never expected.

Planetary Nebulae

2012-12-06 Science
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Release : 2012-12-06
Genre : Science
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Book Rating : 60X/5 ( reviews)

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Book Synopsis Planetary Nebulae by : G.A. Gurzadyan

Download or read book Planetary Nebulae written by G.A. Gurzadyan. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: The publication in English of this monograph seems to me to indicate the ever increasing interest of astrophysicists in the physical and dynamical problems of planetary nebulae-one of the most interesting and fruitful branches of theoretical astrophysics. Their interest in part arises from the fact that the methods of identify ing the physical processes occurring in planetary nebulae, as well as the many theo retical results, are now acquiring a degree of uni versality as their sphere of application increases. Finally, the special cosmic significance of planetary nebulae is becoming apparent. The English edition of Planetary Nebulae differs considerably from the Russian version published in 1962, primarily because of the new results included in it, but also because of numerous editorial revisions. The problems of magnetic fields and hydrodynamics in planetary nebulae are beginning to occupy an important place in the study of the dynamics of these objects. Recent studies by D. H. Menzel confirm the idea advanced in the present mono graph as to the existence of magnetic fields in planetary nebulae. New light is being cast on the dynamics of planetary nebulae by the hydrodynamic investigations of F. D. Kahn, W. G. Mathews and others. Unfortunately I was not able to include these and other interesting results in the present edition.

Kinematics and Dynamics of Diffuse Astrophysical Media

2012-12-06 Science
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Release : 2012-12-06
Genre : Science
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Book Rating : 265/5 ( reviews)

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Book Synopsis Kinematics and Dynamics of Diffuse Astrophysical Media by : John E. Dyson

Download or read book Kinematics and Dynamics of Diffuse Astrophysical Media written by John E. Dyson. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: The area of diffuse astrophysical media is enormous and ranges over circum stellar to extragalactic scales. The physical conditions can vary from cool dusty gases to collections of relativistic particles. Flows in such media are set up by en ergy and momentum injection from winds, jets and explosions. The study of these phenomena involves physics, chemistry and, inevitably, hydrodynamics. One of the most important aspects of this study is the ever increasing overlap between theory and observation. Indeed, it can be argued that the only way to really understand these complex flows which can never be duplicated under terrestrial conditions, is to encourage this overlap, and this was one major aim of this Conference. Because of the long theoretical and observational association of the Manchester Group with this general area, Manchester seemed an appropriate venue for this Con ference. But in fact this long association and the actual year of the Conference are connected. In 1951 Franz Kahn joined the Astronomy Department at Manchester University and immediately the study of diffuse media, particularly the hydrody namic aspects, commenced and has flourished ever since. Franz became Head of the Astronomy Department in 1981 following the retirement of Professor Z. Kopal, who founded the Department and was instrumental in attracting Franz to it. In 1993, Franz retired from this position and a most serendipidous coincidence was his election to the Royal Society announced shortly before the Conference.

The Origin and Evolution of Planetary Nebulae

2000-05-25 Medical
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Release : 2000-05-25
Genre : Medical
Kind : eBook
Book Rating : 138/5 ( reviews)

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Book Synopsis The Origin and Evolution of Planetary Nebulae by : Sun Kwok

Download or read book The Origin and Evolution of Planetary Nebulae written by Sun Kwok. This book was released on 2000-05-25. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative volume provides a comprehensive review of the origin and evolution of planetary nebulae. It covers all the stages of their evolution, carefully synthesizes observations from across the spectrum, and clearly explains all the key physical processes at work. Particular emphasis is placed on observations from space, using the Hubble Space Telescope, the Infrared Space Observatory, and the ROSAT satellite. This book presents a thoroughly modern understanding of planetary nebulae, integrating developments in stellar physics with the dynamics of nebular evolution. It also describes exciting possibilities such as the use of planetary nebulae in determining the cosmic distance scale, the distribution of dark matter and the chemical evolution of galaxies. This book provides graduate students with an accessible introduction to planetary nebulae, and researchers with an authoritative reference. It can also be used as an advanced text on the physics of the interstellar medium.

Planetary Nebulae Beyond the Milky Way

2006-07-30 Science
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Release : 2006-07-30
Genre : Science
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Book Rating : 702/5 ( reviews)

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Book Synopsis Planetary Nebulae Beyond the Milky Way by : L. Stanghellini

Download or read book Planetary Nebulae Beyond the Milky Way written by L. Stanghellini. This book was released on 2006-07-30. Available in PDF, EPUB and Kindle. Book excerpt: Recently, improved observational capabilities have allowed the study of fainter and fainter extra-galactic planetary nebulae in galaxies well beyond the Milky Way. This book result from a workshop held at ESO headquarters in Garching in 2004, the first devoted to Extra-galactic Planetary Nebulae. A wide range of topics is covered, from stellar and nebular astrophysics to galactic dynamics and galaxy clusters, making this a reference of broad astrophysical interest.

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