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Light Curve Modeling Of Eclipsing Binary Stars

Author : E.F. Milone
ISBN : 9781461227427
Genre : Science
File Size : 52.93 MB
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In the two decades since the development of the first eclipsing-binary modeling code, new analytic techniques and the availability of powerful, sometimes dedicated computing facilities have made possible vastly improved determinations of fundamental and even transient stellar parameters. The scale of these developments, of course, raises questions about modeling tools, techniques, and philosophies, such as: Who will maintain and upgrade the codes? Will the codes be open to improvement by outsiders, and if so, how? And, indeed, what should be the goals of a modeling program? Such questions had not been aired for a long time and, for this reason alone, deserved to be discussed in as general a forum as the community provides. This volume contains material presented by Commission 42 (Close Binary Stars) during the International Astronomical Union's XXI General Assembly in Argentina, July 1991, and during IAU Colloquium 151, Cordoba, Argentina, August 1991. The techniques discussed include simulations of stellar bright and dark spots, streams, partial and complete stellar disks, prominences, and other features characterizing active stars; modeling of polarization parameters; models that use radial velocities as well as line profile simulations to model velocity field variation across stellar disks; the weighted effects of brightness asymmetries; and models for translucent eclipsing agents such as stellar winds.
Category: Science

Eclipsing Binary Stars

Author : Josef Kallrath
ISBN : 9781475731286
Genre : Science
File Size : 27.22 MB
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Focussing on the formulation of mathematical models for the light curves of eclipsing binary stars, and on the algorithms for generating such models, this book provides 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 optimisation, co-ordinate systems, and specific models. While emphasising the physical and mathematical framework, the discussion remains close to the problems of actual implementation. The book concludes with chapters on specific models and approaches and the authors'views on the structure of future light-curve programs.
Category: Science

An Introduction To Close Binary Stars

Author : R. W. Hilditch
ISBN : 0521798000
Genre : Science
File Size : 30.99 MB
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This 2001 book was the first to provide a pedagogical and comprehensive introduction to binary stars for advanced students.
Category: Science

Ver Nderliche Sterne

Author : C. Hoffmeister
ISBN : 3662107597
Genre : Science
File Size : 32.29 MB
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Der Vorschlag, eine zweite Auflage diel:les Buches herauszubringen, kam gleicher maßen vom Kreis der Benutzer, vom Verlag und von den Herausgebern der ersten Auflage. Durch einen glücklichen Zufall fällt die Vollendung des Manuskripts und die Abfassung dieser Zeilen in die Zeit des 90. Geburtstages von CUNO HOFFMEISTER, dem Autor der ersten Auflage, und so soll das vorliegende Werk seinem Andenken gewidmet sein. Was CUNO HOFFMEISTER zu Beginn des Vorworts der ersten Auflage über die Schwierigkeiten der Literaturauswahl schrieb, galt natürlich nicht nur für ihn damals, sondern es gilt für uns heute in verstärktem Maße. Zwar hat, nicht zuletzt durch die Aktivität der Internationalen Astronomischen Union, die Anzahl zusammen fassender Darstellungen von Teilgebieten, die beispielsweise auf Symposien oder Kolloquien behandelt wurden, stark zugenommen. Die Autoren dieser zweiten Auflage konnten und mußten hierauf vielfältig zurückgreifen und verweisen. Trotzdem mußte in zahlreichen Fällen die Literaturauswahl subjektiv bleiben, und sie führte nicht sel ten, gelegentlich sogar gewollt, zu einer Betonung eigener Arbeitsgebiete und Interes sen. In- und ausländische Fachkollegen mögen freundlich entschuldigen, wenn sie nicht genügend oder gar nicht zitiert sind, weil wir keinerlei Versuch gewagt haben, Vollständigkeit anzustreben.
Category: Science

Zdenek Kopal S Binary Star Legacy

Author : Horst Drechsel
ISBN : 1402031319
Genre : Science
File Size : 72.67 MB
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An international conference entitled "Zdenek Kopal's Binary Star Legacy" was held on the occasion of the late Professor Kopal's 90th birthday in his home town of Litomyšl/Czech Republic and dedicated to the memory of one of the leading astronomers of the 20th century. Professor Kopal, who devoted 60 years of his scientific life to the exploration of close binary systems, initiated a breakthrough in this field with his description of binary components as non-spherical stars deformed by gravity, with surfaces following Roche equipotentials. Such knowledge triggered the development of new branches of astrophysics dealing with the structure and evolution of close binaries and the interaction effects displayed by exciting objects such as cataclysmic variables, symbiotic stars or X-ray binaries. Contributions to this conference included praise of the achievements of a great astronomer and personal reminiscences brought forward by Kopal's former students and colleagues, and reflected the state of the art of the dynamically evolving field of binary research, which owes so much to the pioneering work of Zdenek Kopal.
Category: Science

Artificial Neural Networks Icann 2009

Author : Cesare Alippi
ISBN : 9783642042737
Genre : Computers
File Size : 62.56 MB
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This volume is part of the two-volume proceedings of the 19th International Conf- ence on Artificial Neural Networks (ICANN 2009), which was held in Cyprus during September 14–17, 2009. The ICANN conference is an annual meeting sp- sored by the European Neural Network Society (ENNS), in cooperation with the - ternational Neural Network Society (INNS) and the Japanese Neural Network Society (JNNS). ICANN 2009 was technically sponsored by the IEEE Computational Intel- gence Society. This series of conferences has been held annually since 1991 in various European countries and covers the field of neurocomputing, learning systems and related areas. Artificial neural networks provide an information-processing structure inspired by biological nervous systems. They consist of a large number of highly interconnected processing elements, with the capability of learning by example. The field of artificial neural networks has evolved significantly in the last two decades, with active partici- tion from diverse fields, such as engineering, computer science, mathematics, artificial intelligence, system theory, biology, operations research, and neuroscience. Artificial neural networks have been widely applied for pattern recognition, control, optimization, image processing, classification, signal processing, etc.
Category: Computers

Short Period Binary Stars Observations Analyses And Results

Author : Eugene F. Milone
ISBN : 9781402065446
Genre : Science
File Size : 39.7 MB
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This book explores cataclysmic variables with and without strong, overpowering magnetic fields. You’ll read about stars with densities ranging from that of the Sun to the degenerate matter of white dwarfs to the ultra-compact states of neutron stars and black holes. One of the objects examined and discussed is the Double Pulsar, highlighting what observations have told us about fundamental physics.
Category: Science