Download or read book Cosmic Explosions written by Edo Berger and published by Universal-Publishers. This book was released on 2004 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diversity of stellar death is revealed in the energy, velocity and geometry of the explosion debris ("ejecta''). Using multi-wavelength observations of gamma-ray burst (GRB) afterglows I show that GRBs, arising from the death of massive stars, are marked by relativistic, collimated ejecta ("jets'') with a wide range of opening angles. These results suggest that various cosmic explosions are powered by a common energy source, an "engine'' (possibly an accreting stellar-mass black hole), with their diverse appearances determined solely by the variable high velocity output. On the other hand, using radio observations I show that local type Ibc core-collapse supernovae generally lack relativistic ejecta and are therefore not powered by engines. Instead, the highest velocity debris in these sources, typically with a velocity lower than 100,000 km/sec, are produced in the (effectively) spherical ejection of the stellar envelope. The relative rates of engine- and collapse-powered explosions suggest that the former account for only a small fraction of the stellar death rate. Using the first radio and submillimeter observations of GRB hosts, I show that some are extreme starburst galaxies with the bursts directly associated with the regions of most intense star formation. I suggest, by comparison to other well-studied samples, that GRBs preferentially occur in sub-luminous, low mass galaxies, undergoing the early stages of a starburst process. If confirmed with future observations, this trend will place GRBs in the forefront of star formation and galaxy evolution studies.
Download or read book Cosmic Explosions written by J.M. Marcaide and published by Springer Science & Business Media. This book was released on 2005-11-21 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supernovae are among the most energetic phenomena in the Universe and - lated to almost all aspects of modern astrophysics including starburst gal- ies, cosmic ray acceleration, neutron star and black hole formation, nuc- osynthesis and ISM chemical enrichment, energy input to the ISM, cosmic distance scale determination, dark energy related cosmological acceleration, gamma-ray bursts, extra-solar system neutrino burst detection, gravity wave generation, and many more. Additionally, the past 15 years have been p- ticularly productive with many new results and new understanding due in particular to the closest SN in 400 years in SN 1987A in the Large M- ellanic Cloud, and the unusually bright and close SN 1993J and SN 1994I in the nearby galaxies M81 and M51, respectively. In addition, the disc- ery of the ?-ray burst GRB 980425 and its related supernova SN 1998bw, and the con?rmation of GRB 030329/SN 2003dh, tied the study of SNe and GRBs inextricably together. With the many developments since the last - jor supernova meeting in La Serena, Chile in 1997, we felt that it was an appropriate time to bring together experts and students interested in the subject for a meeting where SN and GRB properties and interrelationships could be discussed. The tenth anniversary of SN 1993J provided such an - portunity and, appropriately, the meeting was held in Spain where SN 1993J was discovered on the early morning of 28 March 1993 by a Spanish amateur astronomer, Francisco Garc ́ ?a.
Download or read book The Many Facets of Cosmic Explosions written by Alicia Soderberg and published by Universal-Publishers. This book was released on 2007-10 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type Ibc supernova (SN Ibc). While all these events result from the death of massive stars, the electromagnetic luminosities of GRBs and XRFs exceed those of ordinary Type Ibc SNe by many orders of magnitude. The observed diversity of stellar death corresponds to large variations in the energy, velocity, and geometry of the explosion ejecta. Using multi-wavelength (radio, optical, X-ray) observations of the nearest GRBs, XRFs, and SNe Ibc, I show that GRBs and XRFs couple at least 1048 erg to relativistic material while SNe Ibc typically couple less than 1048 erg to their fastest (albeit non-relativistic) outflows. Specifically, I find that less than 3 percent of local SNe Ibc show any evidence for association with a GRB or XRF. Interestingly, this dichotomy is not echoed by the properties of their optical SN emission, dominated by the radioactive decay of Nickel-56; I find that GRBs, XRFs, and SNe Ibc show significant overlap in their optical peak luminosity and photospheric velocities. Recently, I identified a new class of GRBs and XRFs that are under-luminous in comparison with the statistical sample of GRBs. Owing to their faint high-energy emission, these sub-energetic bursts are only detectable nearby (z
Download or read book Cosmic Explosions in Three Dimensions written by Peter Höflich and published by Cambridge University Press. This book was released on 2004-12-16 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supernovae and gamma-ray bursts are the strongest explosions in the Universe. Observations show that, rather than being symmetrical, they are driven by strong jets of energy and other asymmetrical effects. These observations demand theories and computations that challenge the biggest computers. This volume marks the transition to a fresh paradigm in the study of stellar explosions. It highlights the burgeoning era of routine supernova polarimetry and the insights into core collapse and thermonuclear explosions. With chapters by leading scientists, the book summarises the status of a fresh perspective on stellar explosions and should be a valuable resource for graduate students and research scientists.
Download or read book Extreme Explosions written by David S. Stevenson and published by Springer Science & Business Media. This book was released on 2013-09-05 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: What happens at the end of the life of massive stars? At one time we thought all these stars followed similar evolutionary paths. However, new discoveries have shown that things are not quite that simple. This book focuses on the extreme –the most intense, brilliant and peculiar– of astronomical explosions. It features highly significant observational finds that push the frontiers of astronomy and astrophysics, particularly as before these objects were only predicted in theory. This book is for those who want the latest information and ideas about the most dramatic and unusual explosions detected by current supernova searches. It examines and explains cataclysmic and unusual events in stellar astrophysics and presents them in a non-mathematical but highly detailed way that non-professionals can understand and enjoy.
Download or read book The Big Bang and Other Explosions in Nuclear and Particle Astrophysics written by David N. Schramm and published by World Scientific. This book was released on 1996 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of important papers by one the world's leading astrophysicists provides a sweeping survey of the incisive and exciting applications of nuclear and particle physics to a wide range of problems in astrophysics and cosmology.The prime focus of the book is on Big Bang cosmology and the role of primordial nucleosynthesis in establishing the modern consensus on the Big Bang. This leads into the connection of cosmology to particle physics and the constraints put on various elementary particles by astrophysical arguments. Big Bang Nucleosynthesis has also led to the argument for nonbaryonic dark matter and is thus related to the major problem in physical cosmology today, namely, structure formation. The nuclear-particle interface with astrophysics also extends to the other topics of major interest such as the age of the universe, cosmic rays, supernovae, and solar neutrinos, each of which will be discussed in some detail. Each section contains historical papers, current papers, and frequently a popular article on the subject which provides an overview of the topic.This volume is testimony to the success of the integration of nuclear and particle physics with astrophysics and cosmology, and to the ingenuity of the work in this area which has earned the author numerous prestigious awards. The book, which is accessible to beginning graduate students, should be of particular interest to researchers and students in astronomy, astrophysics, cosmology and gravitation, and also in high energy and nuclear physics.
Download or read book COSMIC FORCE COSMOLOGY written by SOLATLE LU and published by American Academic Press. This book was released on 2023-06-01 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: LIGHT, the primordial, eternal, pure, almighty energy, is the brightest as well as darkest riddle that has been puzzling to all earthlings for millennia. Whoever truly knows light has already cracked the greatest mystery of the cosmos. Surprisingly! This riddle has been actually cracked independently by three thinkers of different ages. Heraclitus, the Hellenic thinker 2500 years ago, is the first cracker of the riddle with his doctrines that things are constantly changing (universal flux), that opposites coincide, and that fire is the source and nature of all things—We just decode his Fire into LIGHT. 2400 years later, there comes the second cracker Nikola Tesla, the modern Heraclitus, who, in 1899, explicitly declares that Everything is LIGHT. Matter is created from the original and eternal energy that we know as LIGHT. Solatle Lu is the third cracker, the first narrator of the riddle. He explicitly declares, in 2019 in his An Outline of Force Cosmology, that All particles are derived from photons and live forever, substantially honors LIGHT as the Creator of all things, hence elevates the common idea of the three to the Highest Knowledge of 21st century, the Primary Cause, the First Principle. This event marks a great leap in the continuous rational movement of mankind, a new start.
Download or read book Stellar Explosions written by Jordi Jose and published by CRC Press. This book was released on 2016-01-05 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stars are the main factories of element production in the universe through a suite of complex and intertwined physical processes. Such stellar alchemy is driven by multiple nuclear interactions that through eons have transformed the pristine, metal-poor ashes leftover by the Big Bang into a cosmos with 100 distinct chemical species. The products of
Download or read book History of Shock Waves Explosions and Impact written by Peter O. K. Krehl and published by Springer Science & Business Media. This book was released on 2008-09-24 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique and encyclopedic reference work describes the evolution of the physics of modern shock wave and detonation from the earlier and classical percussion. The history of this complex process is first reviewed in a general survey. Subsequently, the subject is treated in more detail and the book is richly illustrated in the form of a picture gallery. This book is ideal for everyone professionally interested in shock wave phenomena.
Download or read book Problems in the Theory of Point Explosion in Gases written by Viktor Pavlovich Korobeĭnikov and published by American Mathematical Soc.. This book was released on 1976 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supernova Explosions written by David Branch and published by Springer. This book was released on 2017-08-02 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Targeting advanced students of astronomy and physics, as well as astronomers and physicists contemplating research on supernovae or related fields, David Branch and J. Craig Wheeler offer a modern account of the nature, causes and consequences of supernovae, as well as of issues that remain to be resolved. Owing especially to (1) the appearance of supernova 1987A in the nearby Large Magellanic Cloud, (2) the spectacularly successful use of supernovae as distance indicators for cosmology, (3) the association of some supernovae with the enigmatic cosmic gamma-ray bursts, and (4) the discovery of a class of superluminous supernovae, the pace of supernova research has been increasing sharply. This monograph serves as a broad survey of modern supernova research and a guide to the current literature. The book’s emphasis is on the explosive phases of supernovae. Part 1 is devoted to a survey of the kinds of observations that inform us about supernovae, some basic interpretations of such data, and an overview of the evolution of stars that brings them to an explosive endpoint. Part 2 goes into more detail on core-collapse and superluminous events: which kinds of stars produce them, and how do they do it? Part 3 is concerned with the stellar progenitors and explosion mechanisms of thermonuclear (Type Ia) supernovae. Part 4 is about consequences of supernovae and some applications to astrophysics and cosmology. References are provided in sufficient number to help the reader enter the literature.
Download or read book Introduction to Gasdynamics of Explosions written by A. K. Oppenheim and published by Springer. This book was released on 2014-05-04 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forbidden History written by J. Douglas Kenyon and published by Simon and Schuster. This book was released on 2005-03-29 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Challenges the scientific theories on the establishment of civilization and technology • Contains 42 essays by 17 key thinkers in the fields of alternative science and history, including Christopher Dunn, Frank Joseph, Will Hart, Rand Flem-Ath, and Moira Timmes • Edited by Atlantis Rising publisher, J. Douglas Kenyon In Forbidden History writer and editor J. Douglas Kenyon has chosen 42 essays that have appeared in the bimonthly journal Atlantis Rising to provide readers with an overview of the core positions of key thinkers in the field of ancient mysteries and alternative history. The 17 contributors include among others, Rand Flem-Ath, Frank Joseph, Christopher Dunn, and Will Hart, all of whom challenge the scientific establishment to reexamine its underlying premises in understanding ancient civilizations and open up to the possibility of meaningful debate around alternative theories of humanity's true past. Each of the essays builds upon the work of the other contributors. Kenyon has carefully crafted his vision and selected writings in six areas: Darwinism Under Fire, Earth Changes--Sudden or Gradual, Civilization's Greater Antiquity, Ancestors from Space, Ancient High Tech, and The Search for Lost Origins. He explores the most current ideas in the Atlantis debate, the origins of the Pyramids, and many other controversial themes. The book serves as an excellent introduction to hitherto suppressed and alternative accounts of history as contributors raise questions about the origins of civilization and humanity, catastrophism, and ancient technology. The collection also includes several articles that introduce, compare, contrast, and complement the theories of other notable authors in these fields, such as Zecharia Sitchin, Paul LaViolette, John Michell, and John Anthony West.
Download or read book Weird Universe written by David A. J. Seargent and published by Springer. This book was released on 2014-10-10 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: As new discoveries complicate the scientific picture of the universe, the evolving theories about the nature of space and time and the origins and fate of the universe threaten to become overwhelming. Enter David Seargent. Continuing the author's series of books popularizing strange astronomy facts and knowledge, Weird Universe explains the bizarre, complicated terrain of modern cosmology for lay readers. From exploring some of the strange consequences of the theories of special and general relativity, to probing time dilation and the twin and mother-and-baby “paradoxes” and the theory that the universe can be mathematically considered as a hologram, all of the latest findings and conjectures are clearly described in non-technical language. The development of quantum physics and the more recent developments of string and M-theory are looked at, in addition to several hypotheses that have not won wide acceptance from the scientific community, such as modified gravity. Enter the wonderfully weird world of these theories and gain a new appreciation for the latest findings in cosmological research.
Download or read book Gamma Ray Bursts written by Gilbert Vedrenne and published by Springer Science & Business Media. This book was released on 2009-03-20 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since their discovery was first announced in 1973, gamma-ray bursts (GRBs) have been among the most fascination objects in the universe. While the initial mystery has gone, the fascination continues, sustained by the close connection linking GRBs with some of the most fundamental topics in modern astrophysics and cosmology. Both authors have been active in GRB observations for over two decades and have produced an outstanding account on both the history and the perspectives of GRB research.
Download or read book Focusing Telescopes in Nuclear Astrophysics written by Peter von Ballmoos and published by Springer Science & Business Media. This book was released on 2006-12-20 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: HESS (High Energy Stereoscopic System), a ground-based Cerenkov array telescopes has been operated since a few years and in 2004 has performed the ?rst Galactic plane scan with a sensitivity of a few percent of the Crab at energies above 100 GeV, resulting in the discoveryofeightsources,mostofwhichwithoutanycounterpartatdifferentenergies[1,2]. ParticularattentionwasdevotedtoHESSJ1813-178,notidenti?edwithanyknownX/gamma ray emitter and hypothesised to be a dark particle accelerator. Independently, and at the same time, INTEGRAL discovered a new soft gamma-ray source, namely IGR J18135-1751, identi?edasthecounterpartofHESSJ1813-178.Thishighenergyemitter,whosenaturewas still mysterious at the time of the discovery was then associated with the supernova remnant (SNR) G12.82 0.02 [6, 10, 18]. Even if a chance coincidence cannot be completely ruled out in view of the 2 arcmin INTEGRAL error box and the possible angular extension in the high energy,theoverallcharacteristicsofthisstarformingregion[7]comprisingSNRG12.82 0.02 areconsistentwithsupernova/plerionorigin.Morerecently,theMAGIC(MajorAtmospheric Gamma Imaging Cerenkov telescope) collaboration has reported a positive observations of HESSJ1813–178,resultinginagamma-ray?uxconsistentwiththepreviousHESSdetection and showing a hard power law with? = 2.1 in the range from 0.4–10TeV [3].
Download or read book NASA Technical Translation written by and published by . This book was released on 1969 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
