Download or read book Photometric Researches written by Bancroft Walker Sitterly and published by . This book was released on 1924 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Language of the Stars written by Zdenek Kopal and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eclipsing Variables - What They can Tell Us and What We can do with Them The aim of the present book will be to provide an introduction to the inter pretation of the observed light changes of eclipsing binary stars and their analysis for the elements of the respective systems. Whenever we study the properties of any celestial body - be it a planet or a star - all information we wish to gain can reach us through two different channels: their gravitational attraction, and their light. Gravitational interaction between our Earth and its celestial neighbours is, however, measurable only at distances of the order of the dimensions of our solar system; and the only means of communication with the realm of the stars are their nimble-footed photons reaching us - with appropriate time-lag - across the intervening gaps of space. As long as a star is single and emits constant light, it does not constitute a very revealing source of information. A spectrometry of its light can disclose, to be sure, the temperature (colour, or ionization) of the star's semi-transparent outer layers, their chemical composition, and prevalent pressure (through Stark effect) or magnetic field (Zeeman effect), it can disclose even some information about its absolute luminosity or rate of spin. It cannot, however, tell us anything about what we should like to know most - namely, the mass or size (i.e., density) of the respective configuration; its absolute dimensions, or its internal structure.

Download or read book On the Determination of the Orbital Elements of Eccentric Eclipsing Binaries written by Theodore E. Sterne and published by . This book was released on 1940 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Eclipsing Binary Stars written by Josef Kallrath and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book An Introduction to the Study of Eclipsing Variables written by Zdeněk Kopal and published by . This book was released on 1946 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Parameter determination of a binary star system written by Fabian Prilasnig and published by GRIN Verlag. This book was released on 2008-03-13 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diploma Thesis from the year 2001 in the subject Astronomy, grade: 1,0, Technical University of Graz, language: English, abstract: The focus of this work about binary star systems is on model applications ans selections of an algorithm to determine the parameters of individual binaries. It consists of four major parts: a general introduction to the theory of binary stars; introductory material about spectroscopy and photometry; a description of IRAF (Imaging Reduction and Analysis Facility) - this is a software program which allows the reduction and the analysis of gathered data of astronomical objects - and its application on parameter determination of the binary system UV Leonis. Last but not least follows the presentation of the spectroscopical and photometrical results of this binary star system. The spectroscopical and photometrical results confirm that the components of the binary star system UV Leonis are main-sequence stars having the same spectral type as the Sun. From the radial velocity curves we can conclude that both components must be nearly spherical due to the sinusoidal shape of their radial velocity curves. The characteristics of their B and V light curves tell us that the orbital inclination is a little bit smaller than 90° because of the V-shaped eclipses. Our results agree with the results from the literature, while masses were spectroscopically determined here for the first time. Our value of the distance to UV Leo is consistent with trigonometric parallax from the Hipparcos mission but our error bar is smaller.

Download or read book Photometric Researches written by Bancroft Walker Sitterly and published by . This book was released on 1930 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Orbits of Eclipsing Binaries written by Harlow Shapley and published by . This book was released on 1915 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbuch der Astrophysik Das sternsystem 2 teil 1 The radial velocities of the stars written by Gustav Eberhard and published by . This book was released on 1928 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Astrophysical Journal written by and published by . This book was released on 1923 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Letters to the Editor" issued as Part 2 of each number and separately paged from v. 148, 1967.

Download or read book The Eclipsing Variable SX Draconis written by William Peden Wamer and published by . This book was released on 1936 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbuch der Astrophysik Das sternsystem 2 t bearb von F C Henroteau H Ludendorff K G Malmquist F J M Stratton 1928 written by Gustav Eberhard and published by . This book was released on 1928 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contributions from the Princeton University Observatory written by Princeton University. Observatory and published by . This book was released on 1916 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Determination of the Elements of Eclipsing Binaries written by Henry Norris Russell and published by . This book was released on 1952 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Henry Norris Russell written by David H. DeVorkin and published by Princeton University Press. This book was released on 2000 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Henry Norris Russell lived in two universes: that of his Presbyterian forebears and that of his science. Sharp-witted and animated by nervous energy, he became one of the most powerful voices in twentieth-century American astronomy, wielding that influence in calculated ways to redefine an entire science. He, more than any American of his generation, worked to turn an observation-centered discipline into a theory-driven pursuit centered on physics. Today, professional and amateur astronomers alike know Russell for the Hertzsprung-Russell diagram, the playing field for much of stellar astrophysics, as well as for his work on the evolution of stars and the origin of the solar system. But of far greater importance than his own research, which was truly remarkable in its own right, is Russell's stamp on the field as a whole. Functioning as a "headquarters scientist"--some called him General--Russell was an astronomer without a telescope. Yet he marshaled the data of the Hales and the Pickerings of the world, injected theory into mainstream astronomy, and brought atomic physics to its very core, often sparking controversy along the way. His students at Princeton went on to populate the most prestigious astronomical institutions in the United States, bringing with them Russell's beliefs that astronomy is really astrophysics and that researchers should be theoretically as well as empirically minded. This first-ever book-length biography of the "Dean of American Astronomers" interweaves personal and scientific history to illuminate how Russell's privileged Presbyterian family background, his education at Princeton and Cambridge, and his personal inclinations and attachments both served and were at odds with his campaign to modernize astronomy. This book will be of interest not only to astronomers and historians (particularly those interested in the emergence of astrophysics), but to anyone interested in the process of disciplinary change.

Download or read book Publications written by University of Missouri. Observatory and published by . This book was released on 1921 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Notices of the Royal Astronomical Society written by Royal Astronomical Society and published by . This book was released on 1913 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portfolio of 8 charts accompanies v. 83.