Search results for: optical-long-baseline-interferometry

Practical Optical Interferometry

Author : David F. Buscher
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A practically focused guide to optical interferometry, bringing together core concepts needed to plan observations, analyse data and reconstruct images.

Visual Double Stars Formation Dynamics and Evolutionary Tracks

Author : J.A. Docobo
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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.

An Introduction to Optical Stellar Interferometry

Author : A. Labeyrie
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During the last two decades, optical stellar interferometry has become an important tool in astronomical investigations requiring spatial resolution well beyond that of traditional telescopes. This book, first published in 2006, was the first to be written on the subject. The authors provide an extended introduction discussing basic physical and atmospheric optics, which establishes the framework necessary to present the ideas and practice of interferometry as applied to the astronomical scene. They follow with an overview of historical, operational and planned interferometric observatories, and a selection of important astrophysical discoveries made with them. Finally, they present some as-yet untested ideas for instruments both on the ground and in space which may allow us to image details of planetary systems beyond our own.

The Very Large Telescope Interferometer Challenges for the Future

Author : Paulo J.V. Garcia
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A JENAM 2002 Workshop, Porto, Portugal, 3-5 September 2002

The Power of Optical IR Interferometry Recent Scientific Results and 2nd Generation Instrumentation

Author : Andrea Richichi
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Celebrating the completion of the first phase of VLTI development, the ESO workshop The Power of Optical/IR Interferometry, held in 2005, gathered researchers together to review and discuss not just interferometers, but also how science uses interferometers and their impact on astronomy as a whole. This volume contains the proceedings of this workshop, serving as a reference for astronomers working with optical and infrared interferometry.

Principles of Long Baseline Stellar Interferometry

Author : Peter R. Lawson
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Jets from Young Stars II

Author : Francesca Bacciotti
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This volume offers a background in modern high spatial resolution techniques, illustrating how such methods have impacted on our understanding of young stars. It provides hands-on insight into observing from space as well as the ground, the use of interferometers at millimeter and infrared wavelengths, image analysis and spectral diagnostic techniques, and High Angular Resolution studies of the inner regions of circumstellar disks that play a fundamental role in jet launching.

Estimation and Tracking of Atmospheric Delay Noise in a Long baseline Optical Stellar Interferometer and Determination of the Expected Estimation Error

Author : Jeffrey Meisner
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Astronomical and Astrophysical Objectives of Sub Milliarcsecond Optical Astrometry

Author : International Astronomical Union. Symposium
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Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry contains a series of papers that discuss the major changes occurring in modern astrometry. The results of space missions in astrometry, Hipparcos and some results from the Hubble Space telescope are presented for the first time. Combined with ground based results, this provides astrometry results at milliarcsecond resolution. At the same time, the extragalactic reference frame, based on very long baseline interferometry radio positions, is being introduced as the fundamental reference frame. It is now also evident that future optical interferometry space missions can provide an additional improvement in future of orders of magnitude. In addition to presenting the results, the book also discusses different applications based on such accurate astrometric positions. This startling improvement in resolution will encourage all astronomers to consider what can be done in future, providing a great stimulus to forthcoming research.

Very Long Baseline Interferometry Applied to Polar Motion Relativity and Geodesy

Author : Chopo Ma
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"The causes and effects of diurnal polar motion are described. An algorithm is developed for modeling the effects on very long baseline interferometry observables. Five years of radio-frequency very long baseline interferometry data from stations in Massachusetts, California, and Sweden are analyzed for diurnal polar motion. It is found that the effect is larger than predicted by McClure. Corrections to the standard nutation series caused by the deformability of the earth have a significant effect on the estimated diurnal polar motion scaling factor and the post-fit residual scatter. Simulation3 of high precision very long baseline interferometry experiments taking into account both measurement uncertainty and modeled errors are described. It is found that the Wide-Band Optical Very Long Baseline Interferometer may be useful in studying gravitational deflection near Jupiter. A selection is made between two three-station networks for monitoring polar motion. The effects of scheduling and the number of sources observed on estimated baseline errors are discussed. It is found that a moderate number of sources should yield the best results. A comparison of actual and simulated experiments indicates that the present variability of real data is not well predicted."--Page [i].

New Frontiers in Stellar Interferometry

Author : Wesley A. Traub
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Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.

International Trends in Optics

Author : Joseph W. Goodman
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International Trends in Optics ...

Science Cases for Next Generation Optical infrared Interferometric Facilities the Post VLTI Era

Author : Jean Surdej
File Size : 89.11 MB
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Very Long Baseline Interferometer

Author : Fujinobu Takahashi
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VLBI is an acronym for Very Long Baseline Inferometry, and can be roughly divided into two areas of application. The first area is in geodesy, which is covered in considerable detail in this book. The second area is in astrometry, or radio astronomy, which is only briefly treated in the book.

Amplitude and Intensity Spatial Interferometry II

Author : James B. Breckinridge
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Diffraction Limited Imaging with Very Large Telescopes

Author : D.M. Alloin
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A few years ago, a real break-through happened in observational astronomy: the un derstanding of the effect of atmospheric turbulence on the structure of stellar images, and of ways to overcome this dramatic degradation. This opened a route to diffraction-limited observations with large telescopes in the optical domain. Soon, the first applications of this new technique led to some outstanding astrophysical results, both at visible and infrared wavelengths. Yet, the potential of interferometric observations is not fully foreseeable as the first long-baseline arrays of large optical telescopes are being built or cOIIllnissioned right now. In this respect a comparison with the evolution of radio-astronomy is tempting. From a situation where, in spite of the construction of giant antennas, low angular resolution was prevailing, the introduction of long baseline and very long baseline interferometry and the rapid mastering of sophisticated image reconstruction techniques, have brought on a nearly routine basis high dynamic range images with milliarcseconds resolution. This, of course, has completely changed our views of the radio sky.

Fiber optics weekly update

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Aperture Synthesis

Author : Swapan Kumar Saha
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This book deals with the fundamentals of stellar interferometry with emphasis on aperture synthesis using sparse array of telescopes particularly at optical/IR wavelengths, the origin, properties, and optical effects of turbulence in the Earth's atmosphere, techniques developed to overcome image degradation. Studded with more than one hundred and fifty illustrations and tens of footnotes, it addresses the basic tricks of trade, current trend, motivation, methods, and path to future promise of true interferometry both from the ground and space. Also discussed are the technical challenge involved, such as beam transportation and recombination, detecting fringes using modern sensors, and image synthesis. Astronomical science that benefits from aperture synthesis imaging are highlighted as well.

14th Congress of the International Commission for Optics

Author : International Commission for Optics. Congress
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Spatial Interferometry in Optical Astronomy

Author : Daniel Y. Gezari
File Size : 82.48 MB
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