Observations of Radio Recombination Lines of Hydrogen, Helium, and Carbon PDF Download
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Author: Edward B. Churchwell
Publisher:
ISBN:
Category :
Languages : en
Pages : 394
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Author: Edward B. Churchwell
Publisher:
ISBN:
Category :
Languages : en
Pages : 394
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Book Description
Author: Edward Bruce Churchwell
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: M.A. Gordon
Publisher: Springer Science & Business Media
ISBN: 0387096914
Category : Science
Languages : en
Pages : 369
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Book Description
This guide to the physics and observations of Radio Recombination Lines from astronomical sources includes history, theory, applications, 250 equations and 110 illustrations. This soft cover edition contains corrections and updates from hardbound edition.
Author: Mark Gordon
Publisher: Springer Science & Business Media
ISBN: 9781402010163
Category : Medical
Languages : en
Pages : 382
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Book Description
This book is a comprehensive guide to the physics and observations of Radio Recombination Lines from astronomical sources, written for astronomers, physicists, and graduate students. It is suitable for a graduate-level textbook. It includes the history of RRL detections, the astrophysics underlying their intensities and line shapes including topics like departures from LTE and Stark broadening, the maximum possible size of an atom, as well as detailed descriptions of the astronomical topics for which RRLs have proved to be effective tools.The text includes more than 250 equations and 110 illustrations. It also contains hundreds of specific references to the astronomical literature to enable readers to explore additional details. The appendix includes supplementary information such as the detailed physics underlying the Bohr atomic model, tables of RRL frequencies including fine structure components, techniques for calculating hydrogenic oscillator strengths, FORTRAN code for calculating departure coefficients, and a discussion with formulas for converting observational (telescope) intensity units to astrophysical ones.
Author: P.A. Shaver
Publisher: Springer Science & Business Media
ISBN: 9400990243
Category : Science
Languages : en
Pages : 281
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Book Description
Since their first detection 15 years ago, radio recombination lines from several elements have been observed in a wide variety of objects including HII regions, planetary nebulae, molecular clouds, the diffuse interstellar medium, and recently, other galaxies. The observations span almost the entire range from 0.1 to 100 GHz, and employ both single djsh and aperture synthesis techniques. The theory of radio recombination lines has also advanced strongly, to the point where it is perhaps one of the best-understood in astro physics. In a parallel development, it has become possible over the last decade to study these same highly-excited atoms in the laboratory; this work provides further confirmation of the theoretical framework. However there has been continuing controversy over the astrophysical interpre tation of radio recombination line observations, especially regarding the role of stimulated emission. A workshop was held in Ottawa on 24-25 August, 1979, bringing together many of the active scientists to review the field and discuss these questions of interpretation. A broad concensus has emerged: the subtleties of the line-formation process are understood, and the conditions under which reliable in formation can easily be extracted from the line measurements are known. It thus appears likely that the emphasis will shift increasingly from the study of the line phenomenon itself to further application in other areas of astrophysics, ranging from physical processes in plasmas (temperatures, densities, ionization structure), to the large-scale properties of our galaxy (abundances, kinematics, structure), and studies of extragalactic systems.
Author: Pieter Roelf Roelfsema
Publisher:
ISBN:
Category : H II regions (Astrophysics).
Languages : en
Pages : 196
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Author: Tennyson Jonathan
Publisher: World Scientific
ISBN: 1786346966
Category : Science
Languages : en
Pages : 284
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Book Description
The third edition of Astronomical Spectroscopy examines the physics necessary to understand and interpret astronomical spectra. It offers a step-by-step guide to the atomic and molecular physics involved in providing astronomical spectra starting from the relatively simple hydrogen atom and working its way to the spectroscopy of small molecules.Based on UCL course material, this book uses actual astronomical spectra to illustrate the theoretical aspects of the book to give the reader a feel for such spectra as well as an awareness of what information can be retrieved from them. It also provides comprehensive exercises, with answers given, to aid understanding.
Author: Leslie Hart
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Vernon Lee Pankonin
Publisher:
ISBN:
Category : Interstellar hydrogen
Languages : en
Pages : 500
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Book Description
Author: Siegfried Böhme
Publisher: Springer Science & Business Media
ISBN: 3662123010
Category : Science
Languages : en
Pages : 757
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Book Description
