[PDF] The Mystery Of Globular Clusters eBook

Author : Erin Marie O'Malley
Publisher :
Page : 390 pages
File Size : 48,78 MB
Release : 2017
Category :
ISBN :

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In recent years, evidence has grown for the existence of multiple stellar populations in globular clusters (GCs). However, questions remain regarding the nature of these populations. Photometric observations clearly show discrete populations while spectroscopic observations seem to show a continuous spread. This dissertation provides steps to better understanding GCs and the complexities associated with their evolution. Calibration of stellar evolution models at low metallicity is necessary for comparison to GCs. Accurate abundances of metal-poor subdwarfs are determined and used in this calibration. A Monte Carlo analysis is then performed in order to determine accurate distances, absolute ages, and integrated orbital trajectories for 24 GCs. These results are of critical importance as they not only incorporate the observational uncertainty, but also the uncertainty incurred by the models themselves. Lastly, high resolution spectra of three GCs (NGC 6681, NGC 6584 and NGC 7099) are obtained for a detailed abundance analysis of red giant branch stars. The high resolution and signal-to-noise achieved in these observations allows for the discovery of a statistically significant Na-O anticorrelation in all three clusters, the populations of which agree with those from photometric observations. Although we cannot determine precisely the nature of the polluters that were the predecessors to the enhanced populations, we do know that both s-process and r-process mechanisms contributed to the evolution and these results can be used to help constrain future models of GC polluter candidates

Author : Sue Becklake
Publisher : Silver Burdett Press
Page : 44 pages
File Size : 33,36 MB
Release : 1979
Category : Science
ISBN : 9780382066993

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Discusses how the mysteries of the universe are slowly being revealed to us by recent developments in space technology and provides basic information on the origin of our universe and its components.

Author : Jonathan E. Grindlay
Publisher : Springer Science & Business Media
Page : 767 pages
File Size : 28,33 MB
Release : 2012-12-06
Category : Science
ISBN : 9401511047

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In the centennial year, 1985-86, of Harlow Shapley's birth, the study of globular clusters was no less important to the development of astronomy than in 1915, when Shapley first noted their concentration on the sky. By 1917 Shapley had used the properties of the system of globular clusters to complete the Copernican revolution and locate the solar system, and its Earth-bound observers, far from the center of the Galaxy and the globular cluster distribution. Seven decades later, in the year of these proceedings, globular cluster research and the study of the system of globular clusters in our own and distant galaxies is undergoing a renaissance of activity. The introduction of new observational tools, particularly CCD imagers and digital spectrographs, as well as powerful theoretical methods have transformed the study of globular clusters into one of the main line areas of modern astrophysics. Thus it seemed particularly appropriate to one of us, when considering how the Harvard College Observatory might mark the Shapley centennial, to propose and plan for an IAU Symposium on Globular Cluster Systems in Galaxies. Planning for the Shapley Symposium, as it came to be called, was even more drawn out than the preparation of this volume. The Symposium was originally proposed to the IAU Secretariat in time for it to be held in August, 1985, so that it might occur in the centennial (calendar) year.

Author : Will Gater
Publisher : Penguin
Page : 226 pages
File Size : 32,28 MB
Release : 2020-09-01
Category : Juvenile Nonfiction
ISBN : 0744035619

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Travel to the furthest reaches of the Universe and visit 100 remarkable objects along the way with this stunning space book for curious kids aged 6-8. Space is so much bigger than young minds can fathom and there is always more to learn. The Mysteries of the Universe is a stunning space encyclopedia for young readers to explore, with reference pages packed with fascinating information, little learners will be captivated as they journey through the vastness of the Universe. From planets and asteroids to black holes and galaxies, every page of this enthralling space book reveals the secrets behind more than 100 celestial objects, and will inspire youngsters as they journey through the vastness of the Universe. Each celestial body is shown both photographically and illustrated, and children will love poring over the detailed close-up images. Get ready to explore fun facts and exciting new scientific discoveries as this best-selling picture book will illuminate imaginations and spark curious minds to explore the vastness of space. The engaging storybook-style descriptions and simple text shed a light on facts, myths, and key discoveries about the universe, perfect for children aged 6-8 to explore the wonders of our solar system and beyond. Celebrate your child’s curiosity as they: - Explore Beautiful illustrations and incredible photography that showcase the mysteries of space. - Reveal Engaging storybook-style descriptions that explain key discoveries about the universe - Uncover 100 remarkable objects in the cosmos. This space encyclopedia for children is the perfect blend of storybook style text with out of this world illustrations which makes it a fantastic space book for children who can't get enough of the solar system. Encourage early learners to go on a journey to explore a world of information, making this the ideal first reference book for kids aged 6-8 to enjoy for hours on end, whether reading with the family or reading alone, this fun fact book also doubles up as the perfect gift for curious kids who love to learn. Explore the vastness of space whilst uncovering: -Stunning Jacket Detail: gold foil, holographic foil & metallic gold edges -Striking photography & illustrations inside -A beautiful book for the whole family to treasure -A quality gift to be passed down through the generations More in the Series Mysteries of the Universe is part of the beautiful and informative Anthology series. Complete the series and nurture your child's curiosity as they explore the natural world with The Wonders of Nature or let them walk with the dinosaurs who ruled the earth before them in Dinosaurs and other Prehistoric Life.

Author : Wolfgang Kapferer
Publisher : Springer Nature
Page : 181 pages
File Size : 37,32 MB
Release : 2021-04-17
Category : Science
ISBN : 3662622025

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Get ready to embark on the exciting search for dark matter—the invisible mass that dominates our universe. This popular science book explains why this mysterious dark matter has been incorporated into the standard model of the universe and how scientists are able to “observe” the invisible. The book starts with the early indications of the existence of dark matter, including the strange cohesion of galaxy clusters, before moving on to modern observations like cosmic background radiation. Along the way, you will learn about the direct and indirect methods being used by researchers to track down dark matter and whatever is behind this strange phenomenon. The Mystery of Dark Matter will appeal to general readers who wish to understand what scientists actually know about dark matter, along with the methods they use to help crack the mystery. This book is a translation of the original German 1st edition Das Rätsel Dunkle Materie by Wolfgang Kapferer, published by Springer-Verlag GmbH Deutschland in 2018.The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors.

Author : Wolfgang Steinicke
Publisher : Cambridge University Press
Page : 661 pages
File Size : 12,2 MB
Release : 2010-08-19
Category : Science
ISBN : 1139490109

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Providing the first comprehensive historical study of the New General Catalogue, this book is an important resource to all those interested in the history of modern astronomy and visual deep-sky observing. It covers the people, observatories, instruments and methods involved in nineteenth-century visual deep-sky observing, as well as prominent deep-sky objects.

Author : B.W. Carney
Publisher : Springer Science & Business Media
Page : 429 pages
File Size : 45,13 MB
Release : 2006-04-18
Category : Science
ISBN : 3540316345

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Star clusters are at the heart of astronomy, being key objects for our understanding of stellar evolution and galactic structure. Observations with the Hubble Space Telescope and other modern equipment have revealed fascinating new facts about these galactic building blocks. This book provides two comprehensive and up-to-date, pedagogically designed reviews on star clusters by two well-known experts in the field. Bruce Carney presents our current knowledge of the relative and absolute ages of globular clusters and the chemical history of our Galaxy. Bill Harris addresses globular clusters in external galaxies and their use as tracers of galaxy formation and cosmic distance indicators. The book is written for graduate students as well as professionals in astronomy and astrophysics.

Author : Charli M Sakari
Publisher : Morgan & Claypool Publishers
Page : 128 pages
File Size : 24,77 MB
Release : 2019-12-30
Category : Science
ISBN : 1643277502

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This book presents a brief compilation of results from nearly a century of research on the globular star clusters in the Andromeda Galaxy (M31). It explores the techniques and limitations of the observations, the successes and challenges of the models, and the paradigm for the formation of M31 that has gradually emerged. These results will eventually be superseded by new data, better analysis techniques, and more complex models. However, the emphasis of this book is on the techniques, thought processes, and connections with other studies.

Author : Andrew McWilliam
Publisher : Cambridge University Press
Page : 520 pages
File Size : 44,12 MB
Release : 2004-09-23
Category : Science
ISBN : 9780521755788

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This Carnegie volume discusses the origin and evolution of elements in our galaxy and others.

Author : Kenneth Glyn Jones
Publisher : Cambridge University Press
Page : 462 pages
File Size : 37,72 MB
Release : 1991-04-04
Category : Nature
ISBN : 9780521370790

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Charles Messier's catalog of nebulae and star clusters, published in 1784, marked the start of a new era of deep-sky astronomy. Today, this tradition of observing galaxies and clusters is kept alive by dedicated amateur astronomers. Nearly all the objects are visible in a small telescope, and many, such as the Crab Nebula and the Andromeda galaxy, are among the most fascinating objects in the universe. Kenneth Glyn Jones has revised his definitive version of Messier's catalog. His own observations and drawings, together with maps and diagrams, make this a valuable introduction to deep-sky observing. Historical and astrophysical notes bring the science of these nebulae right up to date. This is a unique handbook, unlikely ever to be equaled in its completeness and importance to the telescope owner.