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Author : Roger D. Burgess
Publisher :
ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.:/5 (111 download)
Download or read book UBVI Surface Photometry of the Andromeda Spiral Galaxy, M31 written by Roger D. Burgess and published by . This book was released on 1980 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roger D. Burgess
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (963 download)
Download or read book UBVI Surface Photometry of the Andromeda Spiral Galaxy, M31 written by Roger D. Burgess and published by . This book was released on 1984 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1977 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jonathan Sick
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (697 download)
Download or read book The Near-infrared Imaging of the Andromeda Galaxy written by Jonathan Sick and published by . This book was released on 2010 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Andromeda Galaxy (M31) is an ideal target for detailed studies of galaxy structure and tests of stellar population models. This thesis presents deep Canada-France-Hawaii Telescope WIRCam near-infrared J- and Ks-band photometric maps of M31. These near-infrared data alleviate the age-metallicity-dust degeneracy that plagues stellar population analysis of optical-only maps. For the sake of calibrating stellar population models, a detailed reconstruction of the M31 near-infrared surface brightness and a study of sky subtraction uncertainties is needed. The analysis of our 2007 and 2009 WIRCam data has revealed unexpected spatial variations in the sky background shapes over the width of the WIRCam fields. In order to solve for the offset caused by such fluctuations, we have used couplings between images. Scalar sky offsets are optimized to produce a mosaic that is seamless within 0.02% of the sky background. These offsets are solved hierarchically, to reduce the dimensionality of optimizations, and an adaptation of the Nelder Mead downhill simplex ensures a globally optimal solution. Variations in sky shape are well-characterised in median sky images built by nodding to a random ring of sky fields every 1.2 minutes. Sky shape appears consistent across the 3 ° ring of sky fields, while levels do change by ~2%, suggesting that the dominant sky structures extend beyond the M31 survey region. Planar sky offset optimization was tested and promises to significantly improve continuity across the outer disk of M31. Our near-infrared data are part of an effort to assemble a multi-wavelength data set for M31 to study a broad suite of topics in stellar and galaxy evolution.
Author :
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ISBN 13 :
Total Pages : 598 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1977 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Malcolm Stewart
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (66 download)
Download or read book Near Infrared Surface Photometry of Spiral Galaxies written by James Malcolm Stewart and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1032 pages
Book Rating : 4.:/5 (89 download)
Download or read book National Union Catalog written by and published by . This book was released on with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.
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ISBN 13 :
Total Pages : 904 pages
Book Rating : 4.F/5 ( download)
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bernard J. Rauscher
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (328 download)
Download or read book Near Infrared Surface Photometry and Morphology in Virgo Cluster Spiral Galaxy Nuclear Regions written by Bernard J. Rauscher and published by . This book was released on 1995 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yu. N. Efremov
Publisher : CRC Press
ISBN 13 : 9783718649266
Total Pages : 88 pages
Book Rating : 4.6/5 (492 download)
Download or read book Stellar Complexes written by Yu. N. Efremov and published by CRC Press. This book was released on 1989 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Described is the contribution of the comets in the Oort cloud to the angular momentum of the solar system.
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ISBN 13 :
Total Pages : 1008 pages
Book Rating : 4.F/5 ( download)
Download or read book Comprehensive Dissertation Index: Mathematics & statistics. Physics, A-E written by and published by . This book was released on 1984 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Josef Kallrath
Publisher : Springer Science & Business Media
ISBN 13 : 1475731280
Total Pages : 376 pages
Book Rating : 4.4/5 (757 download)
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.
Author : M. Barone
Publisher : Springer Science & Business Media
ISBN 13 : 1461525608
Total Pages : 588 pages
Book Rating : 4.4/5 (615 download)
Download or read book Frontiers of Fundamental Physics written by M. Barone and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Olympia conference Frontiers of Fundamental Physics was a gathering of about hundred scientists who carryon their research in conceptually important areas of physical science (they do "fundamental physics"). Most of them were physicists, but also historians and philosophers of science were well represented. An important fraction of the participants could be considered "heretical" because they disagreed with the validity of one or several fundamental assumptions of modern physics. Common to all participants was an excellent scientific level coupled with a remarkable intellectual honesty: we are proud to present to the readers this certainly unique book. Alternative ways of considering fundamental matters should of course be vitally important for the progress of science, unless one wanted to admit that physics at the end of the XXth century has already obtained the final truth, a very unlikely possibility even if one accepted the doubtful idea of the existence of a "final" truth. The merits of the Olympia conference should therefore not be judged a priori in a positive or in a negative way depending on one's refusal or acceptance, respectively, but considered after reading the actual of basic principles of contemporary science, new proposals and evidences there presented. They seem very important to us.
Author : Gerry A. Good
Publisher : Springer Science & Business Media
ISBN 13 : 9781852334987
Total Pages : 290 pages
Book Rating : 4.3/5 (349 download)
Download or read book Observing Variable Stars written by Gerry A. Good and published by Springer Science & Business Media. This book was released on 2003 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observing variable stars is one of the major contributions amateur astronomers make to science. There are 36,000 variable stars listed in the General Catalogue of Variable Stars, so it is clearly impossible for the limited number of professional observatories to target even the majority of them. That's where amateur astronomers come in - thousands of them turning their telescopes to the sky every night. Variable star observing is the most popular of "real science" activities for amateurs, and Gerry Good's book provides everything needed. The first part of the book provides a highly detailed account of the various classes of variable star, with examples, illustrations and physical descriptions. The second section covers practical aspects of observing, everything from preparation and planning, through observing techniques, to data management and reduction.
Author : Space Telescope Science Institute (U.S.). Symposium
Publisher : Cambridge University Press
ISBN 13 : 9780521630979
Total Pages : 328 pages
Book Rating : 4.6/5 (39 download)
Download or read book The Hubble Deep Field written by Space Telescope Science Institute (U.S.). Symposium and published by Cambridge University Press. This book was released on 1998-10-13 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hubble Deep Field (HDF) is the deepest optical image of the Universe ever obtained. It is the result of a 150-orbit observing programme with the Hubble Space Telescope. It provides a unique resource for researchers studying the formation and evolution of stars and galaxies. This timely volume provides the first comprehensive overview of the HDF and its scientific impact on our understanding in cosmology. It presents articles by a host of world experts who gathered together at an international conference at the Space Telescope Science Institute. The contributions combine observations of the HDF at a variety of wavelengths with the latest theoretical progress in our understanding of the cosmic history of star and galaxy formation. The HDF is set to revolutionize our understanding in cosmology. This book therefore provides an indispensable reference for all graduate students and researchers in observational or theoretical cosmology.
Author :
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ISBN 13 :
Total Pages : 764 pages
Book Rating : 4.F/5 ( download)
Download or read book Astronomy and Astrophysics Monthly Index written by and published by . This book was released on 1988 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. VALTAOJA (Ed)
Publisher : Cambridge University Press
ISBN 13 : 9780521413510
Total Pages : 484 pages
Book Rating : 4.4/5 (135 download)
Download or read book Variability of Blazars written by E. VALTAOJA (Ed) and published by Cambridge University Press. This book was released on 1992 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blazars (also known as BL Lac objects), first discovered in 1978, are unusually energetic objects in the extragalactic universe. About 200 are known or suspected. They are radio sources with highly variable optical and radio emission, as well as high polarisation, and their optical spectra normally have no distinguishable features. It is generally accepted that they belong to that class of galaxies with active galactic nuclei, which are presumed to be driven by infall of matter to a supermassive black hole. In this book researchers give a complete summary of the observations of blazars and the theoretical interpretation. A comprehensive listing of confirmed and candidate objects is included. Mechanisms in which the variability can arise from shocks and relativistic jets are discussed. There are at least four different answers given to the question: what is a blazar? This book is a complete overview of the violent activity observed in these extreme active galactic nuclei.
