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This book focuses on the formulation of mathematical models for the light curves of eclipsing binary stars, and on the algorithms for generating such models. Since information gained from binary systems provides much of what we know of the masses, luminosities, and radii of stars, such models are acquiring increasing importance in studies of stellar structure and evolution. As in other areas of science, the computer revolution has given many astronomers tools that previously only specialists could use; anyone with access to a set of data can now expect to be able to model it. This book will provide astronomers, both amateur and professional, with a guide for - specifying an astrophysical model for a set of observations - selecting an algorithm to determine the parameters of the model - estimating the errors of the parameters It is written for readers with knowledge of basic calculus and linear algebra; appendices cover mathematical details on such matters as optimization, coordinate systems, and specific models. While emphasizing the physical and mathematical framework, the discussion remains close to the problems if actual implementation. It begins with an overview of the problem and a discussion of the observational data that form the basis of any model. The treatment then turns to the direct problem (computing the light curve and other observables from the a given set of parameters) and then to the indirect problem (determining a best-fit set of parameters from the data). The book concludes with chapters on specific models and approaches and the authors' views on the structure of future light- curve programs.

Eclipsing binaries --- Etoiles doubles photométriques --- Light curves --- Courbes de lumière --- Light curves. --- Etoiles doubles photométriques --- Courbes de lumière --- Observations, Astronomical. --- Astronomy—Observations. --- Astrophysics. --- Astronomy, Observations and Techniques. --- Astrophysics and Astroparticles. --- Astronomical physics --- Astronomy --- Cosmic physics --- Physics --- Astronomical observations --- Observations, Astronomical

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Visual arts depend on light to communicate, and an understanding of the physical properties of light and color should enhance the communication for both the artist and the viewer. This book is intended for students in the visual arts and for others with an interest in art, but with no prior knowledge of physics. It presents the science of light - that is, the science behind what and how we see. The approach emphasizes phenomena rather than mathematical theories and the joy of discovery rather than the drudgery of derivations - the opposite of "heavy science". The text includes numerous problems, questions for discussion, and suggestions for simple experiments. It considers such questions as - why is the sky blue? - what is the nature of light? - how do mirrors and prisms affect the color of light? - how do compact disks work? - what can visual illusions tell us about the nature of perception? And it discusses such topics as: the optics of the eye and camera; the physiology of the eye and the nature of color vision; the different kinds of sources of light; photography and holography; symmetry in art and nature; color in printing and painting; computer imaging and processing.

Light. --- Color. --- Lumière --- Couleur --- Light --- Color --- licht --- kleur --- regenboog --- refractometer --- interferometrie --- diffractieoptica --- spectrum --- holografie --- fotografie --- optische gegevensopslag --- Lumière --- Electromagnetic waves --- Light sources --- Spectrum analysis --- Chromatics --- Colour --- Chemistry --- Optics --- Colors --- Thermochromism --- Optics. --- Electrodynamics. --- Lasers. --- Photonics. --- Arts. --- Microwaves. --- Optical engineering. --- Classical Electrodynamics. --- Optics, Lasers, Photonics, Optical Devices. --- Microwaves, RF and Optical Engineering. --- Mechanical engineering --- Hertzian waves --- Electric waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Arts, Fine --- Arts, Occidental --- Arts, Western --- Fine arts --- Humanities --- New optics --- Light amplification by stimulated emission of radiation --- Masers, Optical --- Optical masers --- Light amplifiers --- Optoelectronic devices --- Nonlinear optics --- Optical parametric oscillators --- Dynamics --- Physics --- Acqui 2006