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Radiative Transfer In Moving Media

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Radiative Transfer In Moving Media

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Author : K.K. Sen
language : en
Publisher: Springer
Release Date : 1998-06

Radiative Transfer In Moving Media written by K.K. Sen and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-06 with Science categories.

The advancement of observational techniques has led to the discovery of a large number of stars exhibiting complex spectral structures. This necessitates the search for new methods to study the radiative transfer in such stars. This book presents mathematical methodologies developed for solving radiation transfer problems in moving media and stellar atmospheres.

Perturbation Approach For The Radiative Transfer Equation For 3d Moving Media And Application To Accretion Disks

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Author : Nikolai V. Kryzhevoi
language : en
Publisher:
Release Date : 2001

Perturbation Approach For The Radiative Transfer Equation For 3d Moving Media And Application To Accretion Disks written by Nikolai V. Kryzhevoi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

Perturbation Approach For The Radiative Transfer Equation For 3d Moving Media And Application To Accretion Disks

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Author :
language : en
Publisher:
Release Date : 2001

Perturbation Approach For The Radiative Transfer Equation For 3d Moving Media And Application To Accretion Disks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

The multidimensional radiative transfer equation is solved by means of a perturbation approach in which the full solution is represented by a sequence of 1D solutions. Since the solutions of the higher perturbation orders are given explicitly, and the methods used for the solution of the zero order equation are largely analytical, the corresponding code is more efficient than general multidimensional radiative transfer codes. To examine this iterative procedure the radiation field of a geometrically thin slowly rotating accretion disk is calculated. The method is the improvement of those methods which treat the accretion disk as a system of independent rings because the interaction of the rings is taken into account in the higher perturbation orders. The influences of radial gradients, velocity field etc. on the line profile are discussed. Furthermore, under assumption of the two-stream approximation the analytical solution of the plane-parallel radiative transfer equation is found for a large variety of the internal distribution of the de-excitation coefficient $varepsilon$. A new method for the solution of the equation with the stochastic $varepsilon$ is proposed. In addition, an improved separable approximation method enable us to obtain fast and accurate solution of the basic plane-parallel radiative transfer equation without angle and space discretization.

Radiative Transfer In Coupled Environmental Systems

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Author : Knut Stamnes
language : en
Publisher: John Wiley & Sons
Release Date : 2016-03-18

Radiative Transfer In Coupled Environmental Systems written by Knut Stamnes and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-03-18 with Science categories.

This book is dedicated to the formulation and solution of forward and inverse problems related to coupled media, and provides examples of how to solve concrete problems in environmental remote sensing of coupled atmosphere-surface systems. The authors discuss radiative transfer in coupled media such as the atmosphere-ocean system with Lambertian as well non-Lambertian reflecting surfaces at the lower boundary. The spectral range from the ultraviolet to the microwave region of the electromagnetic spectrum is considered, as are multi-spectral as well as hyperspectral remote sensing, while solutions of the forward problem for unpolarized and polarized radiation are discussed in detail.

Radiative Transfer

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Author : Hélène Frisch
language : en
Publisher: Springer Nature
Release Date : 2022-05-26

Radiative Transfer written by Hélène Frisch and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-26 with Science categories.

This book discusses analytic and asymptotic methods relevant to radiative transfer in dilute media, such as stellar and planetary atmospheres. Several methods, providing exact expressions for the radiation field in a semi-infinite atmosphere, are described in detail and applied to unpolarized and polarized continuous spectra and spectral lines. Among these methods, the Wiener–Hopf method, introduced in 1931 for a stellar atmospheric problem, is used today in fields such as solid mechanics, diffraction theory, or mathematical finance. Asymptotic analyses are carried out on unpolarized and polarized radiative transfer equations and on a discrete time random walk. Applicable when photons undergo a large number of scatterings, they provide criteria to distinguish between large-scale diffusive and non-diffusive behaviors, typical scales of variation of the radiation field, such as the thermalization length, and specific descriptions for regions close and far from boundaries. Its well organized synthetic view of exact and asymptotic methods of radiative transfer makes this book a valuable resource for both graduate students and professional scientists in astrophysics and beyond.

Radiative Transfer In Curved Media

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Author : K K Sen
language : en
Publisher: World Scientific
Release Date : 1990-02-01

Radiative Transfer In Curved Media written by K K Sen and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-02-01 with Mathematics categories.

Most of the methods described in this book can be used with cosmetic modifications to solve transfer problems of greater complexity. All attempts have been made to make the book self-contained.