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Investigating Expansion And Extinction In The Planetary Nebula Ngc 7027 With Hst
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Book Synopsis Investigating Expansion and Extinction in the Planetary Nebula NGC 7027 with HST by : Paula M. Moraga Baez
Download or read book Investigating Expansion and Extinction in the Planetary Nebula NGC 7027 with HST written by Paula M. Moraga Baez and published by . This book was released on 2021 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Planetary nebulae are a late stage of the evolution of intermediate-mass (~1-8 solar mass) stars. A planetary nebula is formed after an asymptotic giant branch star's ejected mass becomes ionized by the stellar core, which is on its way to becoming a white dwarf. The shaping of planetary nebulae is slowly unveiled through studies of young and evolving nebulae such as NGC 7027. I have conducted an extensive analysis of the first-ever suite of contemporaneous panchromatic Hubble Space Telescope Wide Field Camera 3 (HST/WFC3) images of NGC 7027, extending from near-UV to near-IR. Extinction correction is performed successfully on several HST/WFC3 images, facilitating analysis of the spatial distribution of H recombination and forbidden emission lines within the nebula. The resulting extinction-corrected line ratio images and line ratio diagnostic, as well as an analysis of forbidden emission lines, are used are used to distinguish between photoionization and shock-ionized regions and to place constraints on the gas densities in the shocked regions. This analysis revealed regions dominated by shocks in the NW and SE lobes of NGC 7027. All of these results provide insight on the strength of NGC 7027's outflows, confirming previous assertions that NGC 7027 is among the youngest and most rapidly evolving PNe."--Abstract.
Book Synopsis Planetary Nebulae by : Stuart R. Pottasch
Download or read book Planetary Nebulae written by Stuart R. Pottasch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to give a detailed description of the planetary nebulae including the relevant astronomical observations and their interpretation. Considerable attention is given to the evolution of these objects as well as to their physical characteristics. I t is hoped that the book be useful to both advanced research workers and to students with some background in astronomy. In this regard, the book should serve as a text as well as a reference work. The many tables included are expected to be useful for both purposes. The references are generally not included in the text except for historical purposes in an effort to improve readability. References are given at the end of each chapter together with sufficient text to describe their content. No attempt has been made to make the list of references complete; on the contrary it has generally been limited to the most recent literature on the subject which in turn refers to earlier research. Again, exceptions have been made for references of historical interest.
Book Synopsis The Expansion and Possible Structure of the Planetary Nebula NGC 2440 by : James B. Kaler
Download or read book The Expansion and Possible Structure of the Planetary Nebula NGC 2440 written by James B. Kaler and published by . This book was released on 1974 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Millimeter Spectroscopic Survey of Young Planetary Nebula NGC 7027 by : 黃昱瑾
Download or read book Millimeter Spectroscopic Survey of Young Planetary Nebula NGC 7027 written by 黃昱瑾 and published by . This book was released on 2007 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PASCAL. written by and published by . This book was released on 1994 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Astrophysics of Gaseous Nebulae by : Donald E. Osterbrock
Download or read book Astrophysics of Gaseous Nebulae written by Donald E. Osterbrock and published by W.H. Freeman. This book was released on 1974 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis To Measure the Sky by : Frederick R. Chromey
Download or read book To Measure the Sky written by Frederick R. Chromey and published by Cambridge University Press. This book was released on 2010-05-27 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a lively yet rigorous and quantitative approach, this textbook introduces the fundamental topics in optical observational astronomy for undergraduates. It explains the theoretical foundations for observational practices and reviews essential physics to support students' mastery of the subject. Student understanding is strengthened through over 120 exercises and problems.
Book Synopsis Challenges of Astronomy by : Wolfhard Schlosser
Download or read book Challenges of Astronomy written by Wolfhard Schlosser and published by New York, N.Y. : Springer-Verlag. This book was released on 1991 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique collection of thirty experiments ranging from ancient astronomy to cosmology, each containing one or more challenges for the reader. The progression here is from the Earth outward through the solar system to the stellar and galactic realm. Topics include the shape of the sky; Stonehenge as a stone-age abacus; determining the size of the Earth; the distance of the moon, stars and planets; planetary mass, density, temperature and atmosphere; the speed of light; the nature of the quiet and active sun; photometry and spectroscopy; star clusters and variable stars; and fundamental properties of stars.
Book Synopsis Physics of Thermal Gaseous Nebulae by : L.H. Aller
Download or read book Physics of Thermal Gaseous Nebulae written by L.H. Aller and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gaseous nebulae offer outstanding opportunities to atomic physicists, spectroscopists, plasma experts, and to observers and theoreticians alike for the study of attenuated ionized gases. These nebulae are often dusty, heated by radiation fields and by shocks. They are short-lived phenomena on the scale of a stellar lifetime, but their chemical compositions and internal kinematics may give important clues to advanced stages of stellar evolution. The material herein presented is based on lectures given at the University of Michigan, University of Queensland, University of California, Los Angeles, and in more abbreviated form at the Raman Institute, at the Scuola Internazionale di Trieste, and elsewhere. Much of it is derived origionally from the series "Physical Processes in Gaseous Nebulae" initiated at the Harvard College Observatory in the late 1930s. I have tried to emphasize the basic physics of the mechanisms involved and mention some of the uncertainties that underlie calculations of many basic parameters. Emphasis is placed on ionized plasmas with electron temperatures typically in the neighborhood of 10,OOOoK. Dust and other ingredients of the cold component of the interstellar medium are treated briefly from the point of view of their relation to hot plasmas of H II regions and planetaries. Chemical composition determinations for nebulae are discussed in some detail while the last section deals with interpretations of elemental abundances in the framework of stellar evolution and nucleogenesis. Gaseous nebulae offer some particularly engaging opportunities for studies of stellar evolution.
Book Synopsis Lecture Notes and Essays in Astrophysics by : Ana Ulla
Download or read book Lecture Notes and Essays in Astrophysics written by Ana Ulla and published by . This book was released on 2004 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fifty Years of Quasars by : Mauro D'Onofrio
Download or read book Fifty Years of Quasars written by Mauro D'Onofrio and published by Springer. This book was released on 2014-10-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 50th anniversary of the discovery of quasars in 1963 presents an interesting opportunity to ask questions about the current state of quasar research. Formatted as a series of interviews with noted researchers in the field, each of them asked to address a specific set of questions covering topics selected by the editors, this book deals with the historical development of quasar research and discusses how advances in instrumentation and computational capabilities have benefitted quasar astronomy and have changed our basic understanding of quasars. In the last part of the book the interviews address the current topic of the role of quasars in galaxy evolution. They summarise open issues in understanding active galactic nuclei and quasars and present an outlook regarding what future observational facilities both on the ground and in space might reveal. Its interview format, the fascinating topic of quasars and black holes, and the lively recollections and at times controversial views of the contributors make this book both rewarding and a pleasure to read!
Book Synopsis The Diffuse Interstellar Bands by : A.G.G.M. Tielens
Download or read book The Diffuse Interstellar Bands written by A.G.G.M. Tielens and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mystery of the diffuse interstellar bands has been variously a curiosity, a co nundrum, and a nuisance for astronomers in the seven decades since the features were first noticed, but recently they have become a forefront issue in astrophysics. Ever since Paul Merrill, in a series of papers starting in 1934, pointed out the interstellar and unidentified nature of the bands, a Who's Who of twentieth century astronomers have tried their hands at solving the problem of identifying the carriers. Henry Norris Russell, Pol Swings, Otto Struve, Paul Ledoux, W. W. Morgan, Walter Adams, Jesse Greenstein, Lawrence Aller, and Gerhard Herzberg all briefly entered the stage, only to move on quickly to other problems where the chances for progress appeared more realistic. In more recent times a number of equally prominent scientists have pursued the bands, but generally only as a sideline to their real astronomical research. But in the past decade, and particularly in the past three years, the view of the search for the diffuse band absorbers as an interesting but perhaps quixotic quest has changed. Today there are several astronomers, as well as laboratory chemists, who are devoting substantial research time and resources to the problem and, as perhaps the most reliable indicator of the newly elevated status of research in this field, some research grants have now been awarded for the study of the bands.
Book Synopsis The Trans-Neptunian Solar System by : Dina Prialnik
Download or read book The Trans-Neptunian Solar System written by Dina Prialnik and published by Elsevier. This book was released on 2019-11-28 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Trans-Neptunian Solar System is a timely reference highlighting the state-of-the-art in current knowledge on the outer solar system. It not only explores the individual objects being discovered there, but also their relationships with other Solar System objects and their roles in the formation and evolution of the Solar System and other planets. Integrating important findings from recent missions, such as New Horizons and Rosetta, the book covers the physical properties of the bodies in the Trans-Neptunian Region, including Pluto and other large members of the Kuiper Belt, as well as dynamical indicators for Planet 9 and related objects and future prospects. Offering a complete look at exploration and findings in the Kuiper Belt and the rest of the outer solar system beyond Neptune, this book is an important resource to bring planetary scientists, space scientists and astrophysicists up-to-date on the latest research and current understandings. - Provides the most up-to-date information on the exploration of the Trans-Neptunian Solar System and what it means for the future of outer solar system research - Contains clear sections that provide comprehensive coverage on the most important facets of the outer Solar System - Includes four-color images and data from important missions, including New Horizons and Rosetta - Concludes with suggestions and insights on the future of research on Trans-Neptunian objects
Download or read book Science Citation Index written by and published by . This book was released on 1995 with total page 2552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1964- have guides and journal lists.
Book Synopsis Dust in the Galactic Environment by : D.C.B Whittet
Download or read book Dust in the Galactic Environment written by D.C.B Whittet and published by CRC Press. This book was released on 2018-10-08 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dust is a ubiquitous feature of the cosmos, impinging directly or indirectly on most fields of modern astronomy and astrophysics. Dust in the Galactic Environment, Second Edition provides a thorough overview of the subject, covering general concepts, methods of investigation, important results and their significance, relevant literature, and some suggestions for promising avenues of future research. Since the publication of the first edition of this popular graduate text, major advances have been made in our understanding of astrophysical dust, especially in the light of exciting new results from space- and ground-based telescopes, together with advances in laboratory astrophysics and theoretical modeling. This new, expanded edition highlights the latest results and provides a context for future research opportunities. The first chapter provides a historical perspective for current research and an overview of interstellar environments and the role of dust in astrophysical processes, followed by a discussion of the cosmic history of the chemical elements expected to be present in dust and an examination of the effect of gas-dust interactions on gas phase abundances. The next several chapters describe the observed properties of interstellar grains, such as their extinction, polarization, absorption, and emission characteristics. Then, the book explores the origin and evolution of dust, tracing its life cycle in a succession of environments from circumstellar shells to diffuse interstellar clouds, molecular clouds, protostars, and protoplanetary disks. The final chapter summarizes progress toward a unified model. Dust in other galaxies is discussed as an integral part of the text rather than as a distinct topic requiring separate chapters. Containing extensive references and problems to aid understanding and illustrate basic principles, the book is ideally suited for graduate and advanced undergraduate courses. It will also be an invaluable reference for postgraduate students and researchers working in this important field.
Book Synopsis Einstein's Jury by : Jeffrey Crelinsten
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.
Book Synopsis Planetary Nebulae (IAU S323) by : Xiaowei Liu
Download or read book Planetary Nebulae (IAU S323) written by Xiaowei Liu and published by Cambridge University Press. This book was released on 2017-09-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planetary nebulae, glowing shells of ionized gas, are the spectacular products of the evolution of low- and intermediate-mass stars. For astrophysicists, they are important laboratories for the understanding of atomic, molecular, dust, and plasma processes in different cosmic environments; they enable the exploration of the fundamental physics of single and binary star evolution including nucleosynthesis, rotation, mass transfer and loss, and magnetic fields; and they help trace stellar populations, the kinematics, and chemistry of galaxies including our own galaxy, the Milky Way. This volume reviews the current status of this vibrant research field in the form of invited reviews, contributed talks, and posters presented at the IAU Symposium 323. It should be of interest to researchers and advanced students interested in this field and in related fields, including stellar physics, the interstellar medium, and Galactic and extragalactic astronomy.
