Download or read book Helioseismic Diagnostics of Solar Convection and Activity written by Zdenek Svestka and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the recent advances in our understanding of solar convection and activity, and on new methods and results of helioseismic diagnostics. It provides a comprehensive overview of the current status of the field and presents new ideas and approaches.
Download or read book Advances in Solar Research at Eclipses from Ground and from Space written by Jean-Paul Zahn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this Advanced Study Institute was to give an account on the most recent results obtained in solar research. Bucharest was chosen to host it, because the capital city of Romania was located right in the middle of the totality path of the last eclipse of the millennium, on 11th August 1999; furthermore the phenomenon was close to reach there its longest duration: 2m 23s. Such a total eclipse is not only a very spectacular event which draws the crowds: to astronomers, solar eclipses still offer the best conditions for observing the lower part of the corona. The Sun plays a crucial role in our very existence. It was responsible for the formation of the Earth, and rendered this planet fit to host living beings, providing the right amount of heat, and this for a long enough span of time. Quite understandably, it has always been a prime target of human curiosity, and more recently one of scientific investigation. During the last century, it was realized that the Sun is a star like billions of others; we learned since that it draws its energy from the nuclear fusion of hydrogen, and we are now able to estimate its age and life expectancy.
Download or read book The Sun from Space written by Kenneth R. Lang and published by Springer Science & Business Media. This book was released on 2008-10-20 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First Edition of The Sun from Space, completed in 1999, focused on the early accomplishments of three solar spacecraft, SOHO, Ulysses, and Yohkoh, primarily during a minimum in the Sun’s 11-year cycle of magnetic activity. The comp- hensive Second Edition includes the main ndings of these three spacecraft over an entire activity cycle, including two minima and a maximum, and discusses the signi cant results of six more solar missions. Four of these, the Hinode, RHESSI, STEREO, and TRACE missions were launched after the First Edition was either nished or nearly so, and the other two, the ACE and Wind spacecraft, extend our investigations from the Sun to its varying input to the Earth. The Second Edition does not contain simple updates or cosmetic patch ups to the material in the First Edition. It instead contains the relevant discoveries of the past decade, integrated into chapters completely rewritten for the purpose. This provides a fresh perspective to the major topics of solar enquiry, written in an enjoyable, easily understood text accessible to all readers, from the interested layperson to the student or professional.
Download or read book The Century of Space Science written by J.A. Bleeker and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1819 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most attractive features of the young discipline of Space Science is that many of the original pioneers and key players involved are still available to describe their field. Hence, at this point in history we are in a unique position to gain first-hand insight into the field and its development. To this end, The Century of Space Science, a scholarly, authoritative, reference book presents a chapter-by-chapter retrospective of space science as studied in the 20th century. The level is academic and focuses on key discoveries, how these were arrived at, their scientific consequences and how these discoveries advanced the thoughts of the key players involved. With over 90 world-class contributors, such as James Van Allen, Cornelis de Jager, Eugene Parker, Reimar Lüst, and Ernst Stuhlinger, and with a Foreword by Lodewijk Woltjer (past ESO Director General), this book will be immensely useful to readers in the fields of space science, astronomy, and the history of science. Both academic institutions and researchers will find that this major reference work makes an invaluable addition to their collection.
Download or read book Solar Variability and Climate written by E. Friis-Christensen and published by Springer Science & Business Media. This book was released on 2000-12-31 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of an ISSI Workshop, 28 June - 2 July 1999, Bern, Switzerland
Download or read book The Sun written by Michael Stix and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wealth of new experimental and theoretical results has been obtained in solar physics since the first edition of this textbook appeared in 1989. Thus all nine chapters have been thoroughly revised, and about 100 pages and many new illustrations have been added to the text. The additions include element diffusion in the solar interior, the recent neutrino experiments, methods of image restoration, observational devices used for spectroscopy and polarimetry, and new developments in helioseismology and numerical simulation. The book takes particular advantage of the results of several recent space missions, which lead to substantial progress in our understanding of the Sun, from the deep interior to the corona and solar wind.
Download or read book Neutrinos written by Arnold S. Lavro and published by Nova Publishers. This book was released on 2002 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutrinos are one of the most abundant particles in the universe. Because they have very little interaction with matter, however, they are incredibly difficult to detect. Neutrinos are similar to the more familiar electron, with one crucial difference: neutrinos do not carry electric charge. Because neutrinos are electrically neutral, they are not affected by the electromagnetic forces which act on electrons. Three types of neutrinos are known. Each type or 'flavour' of neutrino is related to a charged particle (which gives the corresponding neutrino its name). Hence, the 'electron neutrino' is associated with the electron, and two other neutrinos are associated with heavier versions of the electron called the muon and the tau. The book presents citations from the literature for the last three years from the journal literature and the existent book literature. Access is provided by subject, author and title indexes.
Download or read book Proceedings of the Third UN ESA NASA Workshop on the International Heliophysical Year 2007 and Basic Space Science written by Hans J. Haubold and published by Springer Science & Business Media. This book was released on 2009-12-01 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents Volume II of the Proceedings of the UN/ESA/NASA Workshop on the International Heliophysical Year 2007 and Basic Space Science, hosted by the National Astronomical Observatory of Japan, Tokyo, 18 - 22 June, 2007. It covers two programme topics explored in this and past workshops of this nature: (i) non-extensive statistical mechanics as applicable to astrophysics, addressing q-distribution, fractional reaction and diffusion, and the reaction coefficient, as well as the Mittag-Leffler function and (ii) the TRIPOD concept, developed for astronomical telescope facilities. The companion publication, Volume I of the proceedings of this workshop, is a special issue in the journal Earth, Moon, and Planets, Volume 104, Numbers 1-4, April 2009.
Download or read book The Sun and Space Weather written by Arnold Hanslmeier and published by Springer Science & Business Media. This book was released on 2002-06-30 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the Sun is the main source of space weather effects, the first part of the book is devoted to a general introduction to the physics of the Sun. A better understanding of the phenomena underlying solar activity is also important for prediction of solar outbursts and thus for establishing alert systems for space missions and telecommunication systems. The book contains the following topics: possible influence of the Sun on the Earth's climate; the effects of radiation on humans in space and the expected radiation dose from various solar events; disturbances of the Earth's ionosphere and the implications of radio communication at different wavelength ranges; possible hazardous asteroids and meteoroids and their detection; and space debris and special shielding of spacecraft. In the cited literature more detailed information about the topics may be found. This book provides an introduction and overview of modern solar-terrestrial physics for students as well as for researchers in the field of astrophysics, solar physics, geophysics, and climate research.
Download or read book An Introduction to Modern Astrophysics written by Bradley W. Carroll and published by Cambridge University Press. This book was released on 2017-09-07 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and engaging textbook, covering the entire astrophysics curriculum in one volume.
Download or read book National Optical Astronomy Observatories Newsletter written by and published by . This book was released on 1998 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Helioseismic Detections of Sunspot Regions written by Efstathios Ilonidis and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sunspots are regions where strong magnetic fields emerge from the solar interior and where major eruptive events occur. Sunspot studies are needed to understand the generation and emergence of magnetic fields in the photosphere and monitor the solar magnetic activity. In this thesis, local helioseismology methods are used to detect and study sunspot regions on the far-side of the Sun, the photosphere, and the deep convection zone, before these magnetic regions become visible on the solar disc. One of the successes of helioseismology is the imaging of solar far-side magnetic regions. Helioseismic holography and time-distance technique are capable of detecting sunspot regions on the far side of the sun and provide useful warnings for space weather forecasts. These techniques employ acoustic waves that travel to the far side and return to the front side after multiple bounces in the photosphere. We explore the possibility of far-side imaging by the time-distance technique using three-skip acoustic signals. This method is first validated with use of numerical simulation data and then it is used to detect sunspot regions on the solar far side using SOHO/MDI observations. It is shown that if these maps are combined with maps of existing methods, the appearance of spurious signals is reduced. Sunspot observations in the photosphere show that the acoustic power inside a sunspot region is significantly reduced compared to the quiet Sun. The power deficit is due to three main groups of physical mechanisms: absorption, emissivity reduction, and local suppression. These effects are separated with a measurement scheme that utilizes one- and double-skip waves in sunspots and quiet-sun regions. Using a large sample of sunspots observed with SOHO/MDI, the coefficients of each mechanism are measured as functions of travel distance and their relative contribution to the total power reduction is determined as well. The methods and the results of this study will be utilized for the detection of emerging sunspot regions in the convection zone. Helioseismic methods can be used to detect and study the properties of sunspot regions not only on the solar far side and the photosphere but also in the deep solar interior. We develop a measurement procedure which is capable of detecting emerging sunspot regions at depths around 60,000 km and 1-2 days before the detected magnetic structures emerge to the surface. The detection is based on measurements of the acoustic phase travel-time perturbations with the time-distance helioseismology technique using SOHO/MDI, SDO/HMI, and GONG datasets. The travel-time anomalies are related with cross-covariance frequency perturbations that depend strongly on the acoustic frequency. The implications of these measurements to studies of magnetic flux emergence in the solar convection zone and the potential applications to space weather forecasts are discussed.
Download or read book Dynamics and Control of Energy Systems written by Achintya Mukhopadhyay and published by Springer Nature. This book was released on 2019-10-14 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent advances in dynamics and control of different types of energy systems. It covers research on dynamics and control in energy systems from different aspects, namely, combustion, multiphase flow, nuclear, chemical and thermal. The chapters start from the basic concepts so that this book can be useful even for researchers with very little background in the area. A dedicated chapter provides an overview on the fundamental aspects of the dynamical systems approach. The book will be of use to researchers and professionals alike.
Download or read book Solar Activity Cycle and Particle Acceleration written by Jon Todd Hoeksema and published by . This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reports on Astronomy 2006 2009 IAU XXVIIA written by Karel A. van der Hucht and published by Cambridge University Press. This book was released on 2009-03-23 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Transactions XXVIIA Reports on Astronomy 2006-2009 provides a comprehensive and authoritative review of what has been achieved in astronomy during the years 2006 to 2009. These insightful and up-to-date reviews have been written by the presidents and chairpersons of the IAU scientific bodies: the Divisions, the Commissions, and the Working Groups. Topics covered in this wide-ranging volume include: fundamental astronomy; the Sun and heliosphere; planetary sciences; stars; variable stars; interstellar matter; the Galactic system; galaxies and the Universe; optical and infrared techniques; radio astronomy; space and high-energy astrophysics; and other IAU activities. The reviews have been written at a level suitable for colleagues in the same fields, but will also be useful for students and researchers wishing to gain an overview of astronomical fields beyond their own research area.
Download or read book The Pulsations of the Sun and the Stars written by Jean-Pierre Rozelot and published by Springer. This book was released on 2011-07-03 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of lecture notes brings together the knowledge on pulsations of the Sun and the stars, with a particular emphasis on recent observations and modelling, and on the influence of pulsations of other physical processes. The book begins with an extensive introduction to helioseismology. The solar cycle and gravity modes are discussed before the focus is widened from helioseismology to asteroseismology which is detailed in a series of specific chapters. Based on courses given at a graduate school, these tutorial lecture notes will be of interest and useful to a rather broad audience of scientists and students.
Download or read book Seismic Interferometry written by Deyan Draganov and published by SEG Books. This book was released on 2008 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including more than 70 papers, this invaluable source for researchers and students contains an editors' introduction with extensive references and chapters on seismic interferometry without equations, highlights of the history of seismic interferometry from 1968 until 2003, and offers a detailed overview of the rapid developments since 2004.
