Spectral Line Formation
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Spectral Line Formation
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Author : John T. Jefferies
language : en
Publisher:
Release Date : 1968
Spectral Line Formation written by John T. Jefferies and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Astronomical spectroscopy categories.
The purpose of this book is to discuss certain aspects of the theory of the formation and analysis of the line spectrum of a hot gas. The underlying motivation for most of the studies discussed here lies in a desire to develop a physically sound procedure for interpreting the line spectrum of a stellar atmosphere ; correspondingly, the major emphasis is given to problems encountered in astrophysics.
Progress In Stellar Spectral Line Formation Theory
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Author : J.E. Beckman
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Progress In Stellar Spectral Line Formation Theory written by J.E. Beckman and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Spectral line formation theory is at the heart of astrophysical diagnostic. Our knowledge of abundances, in both stellar and interstellar contexts, comes almost enti rely from line analysis, as does a major fraction of our ability to model stellar atmospheres. As new facets of the universe become observable so the techniques of high reso lution spectroscopy are brought to bear, with great reward. Improved instruments, such as echelle spectrographs, employ ing detectors of high quantum efficiency, have revolutioned our ability to observe high quality line profiles, although until now this ability has been confined to the brightest stars. Fabry-Perot interferometers and their modern deriva tives are bringing new ranges of resolving power to studies of atomic and ionic interstellar lines, and of course radio techniques imply exceedingly high resolution for the cool interstellar medium of molecules and radicals. Telescopes in space are extending the spectral range of these types of observations. Already the Copernicus and IUE high resolution spectrographs have given us a tantalizing glimmer of what it will be like to obtain ultraviolet spectra with resolution and signal to noise ratio approaching those obtainable on the ground. Fairly soon Space Telescope will be producing high resolution spectroscopic data of unparal leled quali ty and distance range. As often happens in astro physics the challenge is now coming from the observers to the theorists to provide interpretational tools which are adequate to the state of the data.
Polarization In Spectral Lines
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Author : M. Landi Degl'Innocenti
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-05-17
Polarization In Spectral Lines written by M. Landi Degl'Innocenti and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-05-17 with Science categories.
The scientific research based on spectropolarimetric techniques is undergoing a phase of rapid growth. Instruments of unprecedented sensitivity are nowadays available, particularly for solar observations. To fully exploit the rich diagnostic content of such observations, it is necessary to understand the physical mechanisms involved in the generation and transfer of polarized radiation in astrophysical (or laboratory) plasmas. After an introductory part based on classical physics, this book tackles the subject by a rigorous quantum-mechanical approach. The transfer equations for polarized radiation and the statistical equilibrium equations for the atomic density matrix are derived directly from the principles of Quantum Electrodynamics. The two sets of equations are then used to present a number of applications, mainly concerning the diagnostics of solar magnetic fields. This book is primarily addressed to scientists working in the field of spectropolarimetry. It may also serve as a textbook for a course at the graduate or advanced undergraduate level.
Formation Depths Of Absorption Lines In The Solar Atmosphere
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Author : V. G. Buslavsky
language : en
Publisher:
Release Date : 1970
Formation Depths Of Absorption Lines In The Solar Atmosphere written by V. G. Buslavsky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Magnetic fields categories.
Effective formation depths are determined for absorption lines in the solar atmosphere used for recording the magnetic field with the double magnetograph of the Crimean Astrophysical Observatory: wavelengths 4808, 5250, 5302, (FeI, 6103 (CaI) and 4554A (BaII).
Exoplanet Atmospheres
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Author : Sara Seager
language : en
Publisher: Princeton University Press
Release Date : 2010-08-02
Exoplanet Atmospheres written by Sara Seager and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-08-02 with Science categories.
Over the past twenty years, astronomers have identified hundreds of extrasolar planets--planets orbiting stars other than the sun. Recent research in this burgeoning field has made it possible to observe and measure the atmospheres of these exoplanets. This is the first textbook to describe the basic physical processes--including radiative transfer, molecular absorption, and chemical processes--common to all planetary atmospheres, as well as the transit, eclipse, and thermal phase variation observations that are unique to exoplanets. In each chapter, Sara Seager offers a conceptual introduction, examples that combine the relevant physics equations with real data, and exercises. Topics range from foundational knowledge, such as the origin of atmospheric composition and planetary spectra, to more advanced concepts, such as solutions to the radiative transfer equation, polarization, and molecular and condensate opacities. Since planets vary widely in their atmospheric properties, Seager emphasizes the major physical processes that govern all planetary atmospheres. Moving from first principles to cutting-edge research, Exoplanet Atmospheres is an ideal resource for students and researchers in astronomy and earth sciences, one that will help prepare them for the next generation of planetary science. The first textbook to describe exoplanet atmospheres Illustrates concepts using examples grounded in real data Provides a step-by-step guide to understanding the structure and emergent spectrum of a planetary atmosphere Includes exercises for students
Complete Spectroscopy For Amateur Astronomers
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Author : Richard Walker
language : en
Publisher:
Release Date : 2017-09-30
Complete Spectroscopy For Amateur Astronomers written by Richard Walker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-30 with Science categories.
A two-volume reference work featuring the full colour Spectral Atlas for Amateur Astronomers and its companion guide, Spectroscopy for Amateur Astronomers.
Transfer Of Radiation In Spectral Lines
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Author : Vsevolod Vladimirovich Ivanov
language : en
Publisher:
Release Date : 1973
Transfer Of Radiation In Spectral Lines written by Vsevolod Vladimirovich Ivanov and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Astrophysics categories.
Nbs Special Publication
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Author :
language : en
Publisher:
Release Date : 1968
Nbs Special Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Weights and measures categories.
Spectrum Formation In Stars With Steady State Extended Atmospheres
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Author : International Astronomical Union. Colloquium
language : en
Publisher:
Release Date : 1970
Spectrum Formation In Stars With Steady State Extended Atmospheres written by International Astronomical Union. Colloquium and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Astronomy categories.
From Lithium To Uranium Iau S228
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Author : International Astronomical Union. Symposium
language : en
Publisher: Cambridge University Press
Release Date : 2005
From Lithium To Uranium Iau S228 written by International Astronomical Union. Symposium and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.
Proceedings of IAU S228 detailing progress in our knowledge of element production and evolution.