Astrometric Binaries
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Astrometric Binaries
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Author : Zdenek Kopal
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Astrometric Binaries written by Zdenek Kopal 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.
During the past years, a number of international astronomical conferences were held at the Remeis-Observatory in Bamberg, four of them sponsored by the International Astronomical Union. The first meeting was organized in 1959 and dealt with Variable Stars, the last one was held in 1981 and focussed on 'Binary and Multiple Stars as Tracers of Stellar Evolution'. The present conference was organized to commemorate the 200th anniversary of the birth of Friedrich Wilhelm Bessel, who was born in Minden on July 22, 1784, and died in Konigsberg on March 17, 1846. When the plan for an international conference on astrometric binaries was presented to several colleagues, we received enthusiastic support and decided to pursue the idea. A Scientific Organizing Committee was soon established, consisting of: Z. Kopal Manchester, u.K.S.M. Gong Nanjing, China (Chairman) M. Grewing Tiibingen, F.R.G.V. Abalakin Pulkovo, U.S.S.R.P. v. d. Kamp Amsterdam, Netherlands J. Dommanget Uccle, Belgium M. Kitamura Tokyo, Japan M.G. Fracastoro Torino, Italy J. Rahe Bamberg, F.R.G.W. Fricke Heidelberg, F.R.G. Ya. Yatskiv Kiev, U.S.S.R.E.H. Geyer Bonn, F.R.G. The meeting took place in Bamberg at the Remeis-Observatory, Astronomical Institute of the University Erlangen-Nurnberg, from June l3 to 15, 1984. The following institutions generously supported the meeting: Deutsche Forschungs gemeinschaft, Bonn; Stadt Bamberg; Universitat Bamberg; Universitat Erlangen Nurnberg; University of Manchester.
Astrometric Binaries
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Author : Zdeněk Kopal
language : en
Publisher:
Release Date :
Astrometric Binaries written by Zdeněk Kopal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
A Guide To Close Binary Systems
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Author : Edwin Budding
language : en
Publisher: CRC Press
Release Date : 2022-05-12
A Guide To Close Binary Systems written by Edwin Budding and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-12 with Science categories.
Introduction to Close Binary Systems provides a comprehensive survey and guide to the fast-moving field of multiple, specifically binary, stars, with an up to date account of research around 'close', i.e. interacting pairs. Such interactions allow direct quantification of stellar properties, opening up factual insights into basic building blocks of the Universe. The book provides a much needed update for the seminal Close Binary Systems of Zdenĕk Kopal. Following a comparable plan, it presents relevant subject matter with an emphasis on building a framework of understanding to serve as a supporting resource for students and researchers. The text starts from a general historical background and progresses into the main theoretical ideas supporting our prima facie interpretation of observations. The central chapters explore further into these observational methods, arranged according to the classic subdivisions of astrometry, spectroscopy and photometry. Optimal inversion of observational data into model parametrization is a theme through these chapters. Significant here is the problem of how non-uniqueness in modelling affects interpretation. The underlying issues of stellar evolution bearing on observational evidence become paramount in the last four chapters. The book proceeds step-by-step from directly understandable examples of unevolved pairs to the challenging cases where stars are found in more and more extreme conditions, leading up to the mergers of massive black hole pairs seen in the new field of gravitational wave astronomy. This is a valuable reference for postgraduate and advanced undergraduate students working in mainstream areas of stellar astrophysics, with applications also to exoplanet research which shares some methodological features. Course designers for stellar astrophysics will find a useful selection of topics within this book. Key features: • Provides a well-explained and backgrounded, up-to-date account of close binary systems, in a fast-moving field of research that is growing in scientific importance • Surveys a wide range of case-studies within the context of binary and multiple star systems • Fills an acknowledged gap in current literature Cover Image: A public memorial to Zdenek Kopal in his home town (birthplace) of Litomysl in Czechia.
Statistical Constraints For Astrometric Binaries With Nonlinear Motion
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Author :
language : en
Publisher:
Release Date : 2005
Statistical Constraints For Astrometric Binaries With Nonlinear Motion written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Useful constraints on the orbits and mass ratios of astrometric binaries in the Hipparcos catalog are derived from the measured proper motion differences of Hipparcos and Tycho-2 (Delta mu), accelerations of proper motions (mu .), and second derivatives of proper motions (mu). It is shown how, in some cases, statistical bounds can be estimated for the masses of the secondary components. Two catalogs of astrometric binaries are generated, one of binaries with significant propermotion differences and the other of binaries with significant accelerations of their propermotions. Mathematical relations between the astrometric observables delta mu, mu., and mu. and the orbital elements are derived in the appendices. We find a remarkable difference between the distribution of spectral types of stars with large accelerations but small proper motion differences and that of stars with large proper motion differences but insignificant accelerations. The spectral type distribution for the former sample of binaries is the same as the general distribution of all stars in the Hipparcos catalog, whereas the latter sample is clearly dominated by solar-type stars, with an obvious dearth of blue stars. We point out that the latter set includes mostly binaries with long periods (longer than about 6 yr).
Critical Observations Versus Physical Models For Close Binary Systems
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Author : Kam-Ching Leung
language : en
Publisher: CRC Press
Release Date : 1988
Critical Observations Versus Physical Models For Close Binary Systems written by Kam-Ching Leung and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Astrometry categories.
This book contains the proceedings of the second joint research program on close binary systems between the People's Republic of China and the United States. The planning for the double stars conference developed gradually through several years of close cooperation between astronomers of the PRC and the US. Topics covered include interacting am binaries, H-alpha emission and polarization of RS CVn stars, observational approach to close binary evolution, the role of polarimetry in understanding close binary stars and their interactions, physical models for close binaries and logical constraints, and accretion disks in dwarf novae.
Visual Double Stars Formation Dynamics And Evolutionary Tracks
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Author : J.A. Docobo
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Visual Double Stars Formation Dynamics And Evolutionary Tracks written by J.A. Docobo 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.
This workshop is devoted to Double stars. The general topics of the meeting were: for mation, dynamics and evolutionary tracks. In accordance with the pure tradition of the Saint James way, "pilgrims" from all over the world come to meet together in Santiago. Although with a common interest (double stars), this meeting was a multidisciplinary one, since scientists with different backgrounds participated in it. As a matter of fact, we think that this is the first workshop jointly supported by IAU Commissions 7 (Celestial mechanics) and 26 (Double and multiple stars). It is our belief that this meeting will be the origin of a more close relations and common research. This meeting was held under the invitation of the University of Santiago de Compostela to commemorate its fifth centenary, and organized by the Astronomical Observatory named after its founder, Ramon M. Aller, who made significant contributions in the study of visual double stars, and was one of the pioneers who put the seeds of the present blossoming of Astronomy in Spain. The Scientific Organizing Committee was formed by Drs. C. Allen, P. Couteau, J. A. Docobo, R. Dvorak, A. Elipe, S. Ferraz-Mello (co-chairman), H.A.McAlister, M. Valtonen, C.Worley (chairman) and H. Zinnecker. The Local Organizing Committee was formed by Drs. J. A. Docobo (chairman), A.
Double Multiple Stars And How To Observe Them
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Author : James Mullaney
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-06-29
Double Multiple Stars And How To Observe Them written by James Mullaney 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 2005-06-29 with Science categories.
Written specially for practical amateur astronomers who not only want to observe, but want to know and understand the details of exactly what they are looking at. Presents an up-to-date detailed description of the objects, their physics and their evolution (part one); and then (part two) to consider how to observe and record them successfully. Delivers a wealth of information for all levels of amateur observers, from the beginner to the experienced; it is equally fascinating for practical astronomers, and also for those who simply want to find out more about these unusual star systems.
Astronomical Applications Of Astrometry
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Author : M. A. C. Perryman
language : en
Publisher: Cambridge University Press
Release Date : 2009
Astronomical Applications Of Astrometry written by M. A. C. Perryman 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 2009 with Nature categories.
An authoritative account of the contributions to science made by the Hipparcos satellite, for astronomers, astrophysicists and cosmologists.
International Conference On Astrometric Binaries
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Author :
language : en
Publisher:
Release Date : 1985
International Conference On Astrometric Binaries written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
Photocentric Orbits From A Direct Combination Of Ground Based Astrometry With Hipparcos Ii
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Author : George A. Gontcharov
language : en
Publisher:
Release Date : 2010
Photocentric Orbits From A Direct Combination Of Ground Based Astrometry With Hipparcos Ii written by George A. Gontcharov and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Astrometry categories.
Based on a direct combination of the Hipparcos data with astrometric ground-based observational catalogues having epochs between 1938 and 1999 the preliminary orbits and component masses are calculated for six binaries with no previous orbit calculation: [Greek letter iota] Vir (HIP 69701) with period of 55 years, photocentric semi-major axis of 200 mas, relative semi-major axis of 830 mas and a dwarf secondary of 0.6 solar masses; [Greek letter gamma] UMa (HIP 58001) - 20.5 years, 90 mas, 460 mas and a dwarf secondary of 0.8 solar masses; [Greek letter kappa] Del (HIP 101916) - 45 years, 100 mas, 520 mas and a dwarf secondary of 0.4 solar masses; 20 Oph (HIP 82369) - 35.5 years, 140 mas, 460 mas and a dwarf secondary of 0.8 solar masses; [Greek letter mu] Ser (HIP 77516) - 36 years, 110 mas, 350 mas and a secondary of 2.3 solar masses; as well as a possible new component of Mizar A ([Greek letter zeta] UMa, HIP 65378) - 36.5 years, 180 mas, 780 mas, 1.5 solar masses. The latter may be a pair of dwarfs.