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Author : International Astronomical Union. Colloquium
Publisher : Unknown
Page : 516 pages
File Size : 55,5 Mb
Release : 1979
Category : Astronomical photometry
ISBN : UIUC:30112077809405
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 40,6 Mb
Release : 1985
Category : Interferometry
ISBN : OCLC:946197921
Author : Henri M. J. Boffin,Gaitee Hussain,Jean-Philippe Berger,Linda Schmidtobreick
Publisher : Springer
Page : 274 pages
File Size : 43,9 Mb
Release : 2016-08-24
Category : Science
ISBN : 9783319397399
This book offers an essential compendium of astronomical high-resolution techniques. Recent years have seen considerable developments in such techniques, which are critical to advances in many areas of astronomy. As reflected in the book, these techniques can be divided into direct methods, interferometry, and reconstruction methods, and can be applied to a huge variety of astrophysical systems, ranging from planets, single stars and binaries to active galactic nuclei, providing angular resolution in the micro- to tens of milliarcsecond scales. Written by experts in their fields, the chapters cover adaptive optics, aperture masking imaging, spectra disentangling, interferometry, lucky imaging, Roche tomography, imaging with interferometry, interferometry of AGN, AGN reverberation mapping, Doppler- and magnetic imaging of stellar surfaces, Doppler tomography, eclipse mapping, Stokes imaging, and stellar tomography. This book is intended to enable a next generation of astronomers to apply high-resolution techniques. It informs readers on how to achieve the best angular resolution in the visible and near-infrared regimes from diffraction-limited to micro-arcsecond scales.
Author : J.G. Robertson,W.J. Tango
Publisher : Springer Science & Business Media
Page : 505 pages
File Size : 40,9 Mb
Release : 2013-12-01
Category : Science
ISBN : 9789401108805
The 1990s are proving to be a very exciting p&iod for high angular resolution astronomy. At radio wavelengths a combination of new array instruments and pow erful imaging algorithms have generated images of unprecedented resolution and quality. In the optical and infrared, the great technical difficulties associated with constructing separated-aperture interferometers have been largely overcome, and many new instruments are now operating or are being developed. As these pro grams start to produce observational results they will be able to draw extensively on the experience gained by the radio-interferometry community. Thus it seemed that the time was ripe for a meeting which would bring together workers from all wavelength ranges to discuss the details of the science and art of "Very High Angular Resolution Imaging" . While the main emphasis of Symposium No. 158 was on high resolution tech niques from the radio, mm-wave, infrared and optical bands, it also provided an opportunity for presentation of astronomical results from these techniques. As well as giving our colleagues from the Northern Hemisphere a break from midwinter, the location of the Symposium in Australia recognised the continuing development of astronomical interferometry in this country, especially the recent completion of the Australia Telescope radio array, and the progress toward com missioning of the Sydney University Stellar Interferometer. A number of the par ticipants visited these instruments during the post-symposium tour.
Author : International Astronomical Union. Colloquium
Publisher : Unknown
Page : 512 pages
File Size : 46,5 Mb
Release : 1979
Category : Astronomical photometry
ISBN : OCLC:869806106
Author : Andreas Glindemann
Publisher : Springer Science & Business Media
Page : 359 pages
File Size : 46,8 Mb
Release : 2011-01-04
Category : Science
ISBN : 9783642150289
The imaging process in stellar interferometers is explained starting from first principles on wave propagation and diffraction. Wave propagation through turbulence is described in detail using Kolmogorov statistics. The impact of turbulence on the imaging process is discussed both for single telescopes and for interferometers. Correction methods (adaptive optics and fringe tracking) are presented including wavefront sensing/fringe sensing methods and closed loop operation. Instrumental techniques like beam combination and visibility measurements (modulus and phase) as well as Nulling and heterodyne interferometry are described. The book closes with examples of observing programmes linking the theory with individual astrophysical programmes.
Author : J. C. Dainty,ROCHESTER UNIV NY INST OF OPTICS.
Publisher : Unknown
Page : 22 pages
File Size : 41,7 Mb
Release : 1982
Category : Electronic
ISBN : OCLC:227571105
The progress made an AFOSR grant 81-0003 is reviewed in six sections: 1. Space-time analysis of images, 2. Phase problem, one dimensional, 3. Phase problem, two dimensional, 4. Laboratory simulations, 5. Observational speckle and 6. Properties of atmospheric turbulence.
Author : Benjamin F. Lane
Publisher : Universal-Publishers
Page : 169 pages
File Size : 49,5 Mb
Release : 2003
Category : Science
ISBN : 9781581122008
This dissertation describes work performed at the Palomar Testbed Interferometer (PTI) during 1998-2002. Using PTI, we developed a method to measure stellar angular diameters in the 1-3 milli-arcsecond range with a precision of better than 5%. Such diameter measurements were used to measure the mass-radius relations of several lower main sequence stars and hence verify model predictions for these stars. In addition, by measuring the changes in Cepheid angular diameters during the pulsational cycle and applying a Baade-Wesselink analysis we are able to derive the distances to two galactic Cepheids (h Aql & z Gem) with a precision of 10%; such distance determinations provide an independent calibration of the Cepheid period-luminosity relations that underpin current estimates of cosmic distance scales. Second, we used PTI and the adaptive optics facility at the Keck Telescope on Mauna Kea to resolve the low mass binary systems BY Dra and GJ 569B, resulting in dynamical mass determinations for these systems. GJ 569B most likely contains at least one sub-stellar component, and as such represents the first dynamical mass determination of a brown dwarf. Finally, a new observing technique, dual star phase referencing, was developed and demonstrated at PTI. Phase referencing allows interferometric observations of stars previously too faint to observe, and is a prerequisite for large-scale interferometric astrometry programs such as the one planned for the Keck Interferometer; interferometric astrometry is a promising technique for the study of extra-solar planetary systems, particularly ones with long-period planets.
Author : Nicolas Nardetto,Yveline Lebreton,Eric Lagadec
Publisher : EDP Sciences
Page : 158 pages
File Size : 41,5 Mb
Release : 2019-09-26
Category : Science
ISBN : 9782759823734
Imaging at high angular resolution (HRA) is a ?ourishing discipline. High performance instruments like the spectro-polarimeter SPHERE at VLT/ESO has recently been implemented. A harvest of splendid results is continuously coming from interferometry with PIONIER, MATISSE, and now GRAVITY (all at VLTI/ESO), VEGA and JouFlu (CHARA), and at longer wavelengths with ALMA at VLTI/ESO and NOEMA/IRAM. The future is already underway with the very close launch of JWST/NASA, and the development of ELT at ESO. HRA provides a unique way to study regions of stellar formation, proto-planetary discs as well as the surfaces of stars and their environments. This volume offers lectures given by world experts in the ?eld during the EvrySchatzman School on Stellar Physics (EES 2017) held in Roscoff, France. The addressed topics include a course of introduction to optical/IR interferometry covering the history and basic principles, a course on diffraction-dominated observational astronomy, and a course presenting the principles and instrumentation of optical long baseline interferometry. This book will be a valuable reference for researchers and students in the coming years.
Author : A. Labeyrie,S. G. Lipson,P. Nisenson
Publisher : Cambridge University Press
Page : 295 pages
File Size : 49,6 Mb
Release : 2006-06-29
Category : Science
ISBN : 9781139457682
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.
Author : Paulo J.V. Garcia,Andreas Glindemann,Thomas Henning,Fabien Malbet
Publisher : Springer Science & Business Media
Page : 313 pages
File Size : 45,5 Mb
Release : 2013-11-11
Category : Science
ISBN : 9789401701570
A JENAM 2002 Workshop, Porto, Portugal, 3-5 September 2002
Author : A. Lagrange,Denis Mourard,Pierre Léna
Publisher : Springer Science & Business Media
Page : 404 pages
File Size : 42,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400900417
Over the last decade many efforts have been made to develop high angular resolution techniques in astrophysics. Combined with imaging facilities, they have rapidly proved their efficiency and have already led to major astrophysical results. During the decade to come, astronomers will be offered new, even more sophisticated high angular resolution tools, especially in the IR and optical domains, coupled with much bigger telescopes, either on the ground or in space. In such a context of rapidly evolving techniques and a growing need for higher angular resolution to test theories or discover new objects, the present book reviews both instrumental and scientific aspects. The main questions addressed are: what kind of science will benefit from high angular resolution techniques? How can they best be used? Audience: The book is accessible to students and research workers in both instrumental and astrophysical aspects.
Author : Harold A. McAlister
Publisher : IOP Publishing Limited
Page : 288 pages
File Size : 55,6 Mb
Release : 2020
Category : Science
ISBN : 0750322063
This book provides a detailed history of stellar interferometry as practised at Mount Wilson Observatory. It covers the origin of the field in the early 19th Century, and its subsequent development throughout the last hundred years at the observatory, including the people, instruments, and methods involved in advancing high angular resolution astronomy. Additionally, two extensive appendices cover the importance of Mount Wilson today as well as an interferometry primer. It is an excellent book for historians, astronomers and anyone interested Mount Wilson. Key Features Describes the revolutionary work performed at the Mount Wilson Observatory in stellar astrophysics, extragalactic astronomy, and its role in high spatial resolution astronomy Focuses on the history and heritage of Mount Wilson Accessible to specialists, historians, and advanced amateur astronomers
Author : Anonim
Publisher : Unknown
Page : 268 pages
File Size : 51,8 Mb
Release : 1977
Category : Astronautics
ISBN : OSU:32435079706438
Author : Daniel Y. Gezari,François Roddier,Claude Roddier
Publisher : Unknown
Page : 266 pages
File Size : 55,5 Mb
Release : 1990
Category : Astronomy
ISBN : NASA:31769000527070
