Download or read book The Chandra Hetgs X Ray Grating Spectrum of Eta Carinae written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-08 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eta Carinae may be the most massive and luminous star in the Galaxy and is suspected to be a massive, colliding wind binary system. The CHANDRA X-ray observatory has obtained a calibrated, high-resolution X-ray spectrum of the star uncontaminated by the nearby extended soft X-ray emission. Our 89 ksec CHANDRA observation with the High Energy Transmission Grating Spectrometer (HETGS) shows that the hot gas near the star is non-isothermal. The temperature distribution may represent the emission on either side of the colliding wind bow shock, effectively 'resolving' the shock. If so, the pre-shock wind velocities are approximately 700 and 1800 km/s in our analysis, and these velocities may be interpreted as the terminal velocities of the winds from 71 Carinae and from the hidden companion star. The forbidden-to-intercombination line ratios for the He-like ions of S, Si, and Fe are large, indicating that the line forming region lies far from the stellar photosphere. The iron fluorescent line at 1.93 angstroms, first detected by ASCA, is clearly resolved from the thermal iron line in the CHANDRA grating spectrum. The Fe fluorescent line is weaker in our CHANDRA observation than in any of the ASCA spectra. The CHANDRA observation also provides the first high-time resolution lightcurve of the uncontaminated stellar X-ray emission from 77 Carinae and shows that there is no significant, coherent variability during the CHANDRA observation. The 77 Carinae CHANDRA grating spectrum is unlike recently published X-ray grating spectra of single massive stars in significant ways and is generally consistent with colliding wind emission in a massive binary.
Download or read book High Resolution X Ray Spectroscopy written by Jelle Kaastra and published by Springer. This book was released on 2011-04-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-resolution X-ray spectroscopy has become a powerful tool for astrophysics since the launch of Chandra and XMM-Newton, ten years ago. The grating spectrometers on both instruments still continue to provide excellent data, while imaging calorimeters are being prepared for future missions like Astro-H and IXO. The synergy with other wavelength bands like the UV has been boosted by the addition of COS to HST. X-ray spectroscopy offers unique diagnostics to study almost any object in the Universe. This book contains review papers on highlights and the state-of-the-art of X-ray spectroscopy for a broad range of objects and on the prospects for future studies.
Download or read book The Chandra X ray Observatory written by Belinda Wilkes and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: NASA's Chandra X-Ray Observatory has ushered in a revolution in X-ray astronomy. Over the last two decades Chandra has captured stunning celestial X-ray images, measured spectra and monitored light curves to reveal and map the hottest, most energetic regions of the universe. Celebrating its 20th anniversary, this book includes current reviews of the major discoveries and scientific results made by Chandra, authored by leading experts in each sub-field. Documenting the progress, discoveries and developments implemented by the mission, this book provides its readers with a comprehensive review of the mission thus far and its potential future implications. The book includes beautiful images of celestial sources generated from Chandra and multi-wavelength data. 3D figures, movies and interactive illustrations are also used throughout to enhance the text.
Download or read book Spectral Analysis of Ultraluminous X ray Sources Using the Chandra Xray Observatory written by Akram Chandrajit Singha, A Senorita Devi and published by Sankalp Publication. This book was released on with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive introduction to the data analysis of ultraluminous X-ray sources. This book will provide the readers with a familiar environment in data analysis methods and the different software used in high energy astrophysical data analysis.
Download or read book The X Ray Spectral Evolution of Eta Carinae As Seen by Asca written by M. F. Corcoran and published by BiblioGov. This book was released on 2013-08 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Technical Reports Server (NTRS) houses half a million publications that are a valuable means of information to researchers, teachers, students, and the general public. These documents are all aerospace related with much scientific and technical information created or funded by NASA. Some types of documents include conference papers, research reports, meeting papers, journal articles and more. This is one of those documents.
Download or read book Signals from Space written by Robert Naeye and published by Steck-Vaughn. This book was released on 2001 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chandra X-ray Observatory is the largest object ever carried into space by the Space Shuttle. Scientists and engineers faced many challenges before they completed the powerful new satellite. But their hard work paid off. The National Aeronautics and Space Administration (NASA) launched Chandra in July 1999. Today, this remarkable satellite sends vivid and astounding X-ray images back to Earth.
Download or read book The Restless Universe written by Eric Matthew Schlegel and published by . This book was released on 2002 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carl Sagan once noted that there is only one generation that gets to see things for the first time. We are in the midst of such a time right now, standing on the threshold of discovery in the young and remarkable field of X-ray astronomy. In The Restless Universe, astronomer Eric Schlegel offers readers an informative survey of this cutting-edge science. Two major space observatories launched in the last few years--NASA's Chandra and the European Newton--are now orbiting the Earth, sending back a gold mine of data on the X-ray universe. Schlegel, who has worked on the Chandra project for seven years, describes the building and launching of this space-based X-ray observatory. But the book goes far beyond the story of Chandra. What Schlegel provides here is the background a nonscientist would need to grasp the present and follow the future of X-ray astronomy. He looks at the relatively brief history of the field, the hardware used to detect X-rays, the satellites--past, present, and future--that have been or will be flown to collect the data, the way astronomers interpret this data, and, perhaps most important, the insights we have already learned as well as speculations about what we may soon discover. And throughout the book, Schlegel conveys the excitement of looking at the universe from the perspective brought by these new observatories and the sharper view they deliver. Drawing on observations obtained from Chandra, Newton, and previous X-ray observatories, The Restless Universe gives a first look at an exciting field which significantly enriches our understanding of the universe.
Download or read book Eta Carinae and Other Mysterious Stars written by Theodore R. Gull and published by . This book was released on 2001 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Observational data, laboratory measurements, and modeling efforts are reported in these papers from a conference on the massive star Eta Carinae and other stars with peculiar spectroscopic signatures. Organized in sections on the spectroscopy of Eta Carinae from X-rays to radio, questions from spectroscopy of other peculiar emission line stars, fluorescence and radiative processes, and spectra of Eta Carinae and Weigelt blobs BD, the papers deal with aspects of the field such as Raman scattering and symbiotic stars, the origin of strings in the outer regions in Eta Carinae, selective emission lines in O-type spectra, and cool star chromospheres and the sun. Annotation c. Book News, Inc., Portland, OR (booknews.com)
Download or read book CNO in the Universe written by Corinne Charbonnel and published by . This book was released on 2003 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Data for the Chandra X ray Observatory written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides data for the Emission Line Project in support of analyses of astronomical data from the Chandra X-Ray Observatory, including tables of wavelengths, energy levels, line classifications, and transition probabilities for ionized spectra of neon, magnesium, silicon, and sulfur. Database may be searched by element, stage of ionization, and output fields.
Download or read book Building Galaxies From The Primordial Universe To The Present Procs Of The Xixth Rencontres De Moriond written by Veronique Cayatte and published by World Scientific. This book was released on 2000-07-17 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings provide a summary of the state-of-the-art in the understanding of physical processes which control galaxy formation. Many topics are discussed which present the latest observational results: dust extinction, the role of AGNs in the formation of massive galaxies, etc. How future instruments such as NGST, ALMA, FIRST, KMT and SKAI can help to resolve these questions is also addressed. The book will serve as a useful reference in the field for many years to come.
Download or read book The High Energy Universe at Sharp Focus written by Eric Matthew Schlegel and published by . This book was released on 2002 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revista Mexicana de Astronom a Y Astrof sica written by and published by . This book was released on 2008-09 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploring the X ray Universe written by Frederick D. Seward and published by Cambridge University Press. This book was released on 2010-08-26 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Capturing the excitement and accomplishments of X-ray astronomy, this second edition now includes a broader range of astronomical phenomena and dramatic new results from the most powerful X-ray telescopes. Covering all areas of astronomical research, ranging from the smallest to the largest objects, from neutron stars to clusters of galaxies, this textbook is ideal for undergraduate students. Each chapter starts with the basic aspects of the topic, explores the history of discoveries, and examines in detail modern observations and their significance. This new edition has been updated with results from the most recent space-based instruments, including ROSAT, BeppoSAX, ASCA, Chandra, and XMM. New chapters cover X-ray emission processes, the interstellar medium, the Solar System, and gamma-ray bursts. The text is supported by over 300 figures, with tables listing the properties of the sources, and more specialized technical points separated in boxes.
Download or read book The X ray Universe written by Wallace H. Tucker and published by . This book was released on 1985 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beyond the range of optical perception--and of ordinary imaginings--a new and violent universe lay undetected until the advent of space exploration. Supernovae, black holes, quasars and pulsars--these were the secrets of the highenergy world revealed when, for the first time, astronomers attached their instruments to rockets and lofted them beyond the earth's x-ray-absorbing atmosphere. The X-Ray Universe is the story of these explorations and the fantastic new science they brought into being. It is a first-hand account: Riccardo Giacconi is one of the principal pioneers of the field, and Wallace Tucker is a theorist who worked closely with him at many critical periods. The book carries the reader from the early days of the Naval Research Laboratory through the era of V-2 rocketry, Sputnik, and the birth of NASA, to the launching of the Einstein X-Ray Observatory. But this is by no means just a history. Behind the suspenseful, sometimes humorous details of human personality grappling with high technology lies a sophisticated exposition of current cosmology and astrophysics, from the rise and fall of the steady-state theory to the search for the missing mass of the universe.
Download or read book Physics and Evolution of Supernova Remnants written by Jacco Vink and published by Springer Nature. This book was released on 2020-11-10 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a leading expert, this monograph presents recent developments on supernova remnants, with the inclusion of results from various satellites and ground-based instruments. The book details the physics and evolution of supernova remnants, as well as provides an up-to-date account of recent multiwavelength results. Supernova remnants provide vital clues about the actual supernova explosions from X-ray spectroscopy of the supernova material, or from the imprints the progenitors had on the ambient medium supernova remnants are interacting with - all of which the author discusses in great detail. The way in which supernova remnants are classified, is reviewed and explained early on. A chapter is devoted to the related topic of pulsar wind nebulae, and neutron stars associated with supernova remnants. The book also includes an extended part on radiative processes, collisionless shock physics and cosmic-ray acceleration, making this book applicable to a wide variety of astronomical sub-disciplines. With its coverage of fundamental physics and careful review of the state of the field, the book serves as both textbook for advanced students and as reference for researchers in the field.
Download or read book Einstein s Jury written by Jeffrey Crelinsten and published by Princeton University Press. This book was released on 2016-05-31 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Einstein's Jury is the dramatic story of how astronomers in Germany, England, and America competed to test Einstein's developing theory of relativity. Weaving a rich narrative based on extensive archival research, Jeffrey Crelinsten shows how these early scientific debates shaped cultural attitudes we hold today. The book examines Einstein's theory of general relativity through the eyes of astronomers, many of whom were not convinced of the legitimacy of Einstein's startling breakthrough. These were individuals with international reputations to uphold and benefactors and shareholders to please, yet few of them understood the new theory coming from the pen of Germany's up-and-coming theoretical physicist, Albert Einstein. Some tried to test his theory early in its development but got no results. Others--through toil and hardship, great expense, and perseverance--concluded that it was wrong. A tale of international competition and intrigue, Einstein's Jury brims with detail gleaned from Crelinsten's far-reaching inquiry into the history and development of relativity. Crelinsten concludes that the well-known British eclipse expedition of 1919 that made Einstein famous had less to do with the scientific acceptance of his theory than with his burgeoning public fame. It was not until the 1920s, when the center of gravity of astronomy and physics shifted from Europe to America, that the work of prestigious American observatories legitimized Einstein's work. As Crelinsten so expertly shows, the glow that now surrounds the famous scientist had its beginnings in these early debates among professional scientists working in the glare of the public spotlight.
