Download or read book Explaining Lithium Enriched Red Giant Branch Stars written by Claudia Aguilera-Gómez and published by Springer. This book was released on 2018-11-28 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis provides new insights into the seemingly anomalous ubiquity of lithium-rich red giant stars. The theory of stellar evolution, one of the most successful models of modern astrophysics, predicts that red giant stars should display negligible levels of lithium (Li) on their surfaces. However, Li-rich giants, defined as those showing more than three times the Li content of the Sun, are found everywhere astronomers look in apparent defiance of established theory. The author addresses this problem, analyzing the different possible explanations for such an anomaly, which include interaction with a binary companion, the production of Li in the interior of the star with its subsequent transport to stellar exteriors, and the stellar interaction with planets. The author focuses on this last possibility, where the Li enrichment may be due to the ingestion of planets or brown dwarfs as the stars in question grew in size while becoming giants. She shows that this process is indeed able to explain an important fraction of giants with Li levels above the three times solar threshold, but that some other mechanism is needed to explain the remaining fraction. While this is an important discovery in its own right, the result that makes this thesis groundbreaking is its demonstration that the threshold between Li-normal and Li-rich is mass dependent rather than a fixed proportion of the Sun’s content. This corrects a fundamental misapprehension of the phenomenon and opens up a new framework in which to understand and solve the problem. Finally, the author presents interesting observational applications and samples with which to test this new approach to the problem of Li enrichment in giants.
Download or read book Red Gold written by Jennifer E. Telesca and published by U of Minnesota Press. This book was released on 2020-04-21 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Illuminating the conditions for global governance to have precipitated the devastating decline of one of the ocean’s most majestic creatures The International Commission for the Conservation of Atlantic Tunas (ICCAT) is the world’s foremost organization for managing and conserving tunas, seabirds, turtles, and sharks traversing international waters. Founded by treaty in 1969, ICCAT stewards what has become under its tenure one of the planet’s most prominent endangered fish: the Atlantic bluefin tuna. Called “red gold” by industry insiders for the exorbitant price her ruby-colored flesh commands in the sushi economy, the giant bluefin tuna has crashed in size and number under ICCAT’s custodianship. With regulations to conserve these sea creatures in place for half a century, why have so many big bluefin tuna vanished from the Atlantic? In Red Gold, Jennifer E. Telesca offers unparalleled access to ICCAT to show that the institution has faithfully executed the task assigned it by international law: to fish as hard as possible to grow national economies. ICCAT manages the bluefin not to protect them but to secure export markets for commodity empires—and, as a result, has become complicit in their extermination. The decades of regulating fish as commodities have had disastrous consequences. Amid the mass extinction of all kinds of life today, Red Gold reacquaints the reader with the splendors of the giant bluefin tuna through vignettes that defy technoscientific and market rationales. Ultimately, this book shows, changing the way people value marine life must come not only from reforming ICCAT but from transforming the dominant culture that consents to this slaughter.
Download or read book Instant Universe written by R. Pelius Cook and published by Lulu.com. This book was released on 2015-07-31 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring strange worlds and alien civilizations is one of the most exciting aspects of science fiction. =GALACTIC BAROQUE= INSTANT UNIVERSE generates exotic locales at any point from the big bang to the end of the Stelliferous Era that better reflect where super- and ultra-advanced technology will take us. Does humankind still live in trees or caves? Of course not! We learned to build our own habitations long ago. Likewise, INSTANT UNIVERSE determines technology levels of civilizations, indicating native life populations, star system development (including terraformed planets, megaengineered space colonies, and beyond), and interstellar colonization. Writers of any genre, gamers, roleplayers, world builders, astronomy enthusiasts, and more will find this heavily researched book useful, fascinating, and fun. It's a great way to introduce children and novices to the wonders of the universe, too!
Download or read book RED GIANTS AND WHITE DWARFS MANS DESCENT FORM THE STARS written by ROBERT JASTROW and published by . This book was released on 1969 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supernovae written by Paul Murdin and published by Cambridge University Press. This book was released on 1985-11-07 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised 1985 edition tells the story of supernovae, capturing the flavour of ancient astronomy.
Download or read book Fox Beware written by Judy Waite and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Universe written by Sol 90 and published by Encyclopaedia Britannica, Inc.. This book was released on 2012-12-01 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updated for 2013, the Universe, is one book in the Britannica Illustrated Science Library Series that covers today's most popular science topics, from digital TV to microchips to touchscreens and beyond. Perennial subjects in earth science, life science, and physical science are all explored in detail. Amazing graphics-more than 1,000 per title-combined with concise summaries help students understand complex subjects. Correlated to the science curriculum in grades 5-9, each title also contains a glossary with full definitions for vocabulary.
Download or read book Barbarians of Lemuria Legendary Edition written by Simon Washbourne and published by . This book was released on 2009-12-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "It is a savage age of sorcery and bloodshed, where strong men and beautiful women, warlords, priests, magicians and gladiators battle to carve a bloody path leading to the Throne of Lemuria. It is an age of heroic legends and valiant sagas too. And this is one of them..." Barbarians of Lemuria; swords & sorcery roleplaying, inspired by Thongor, Conan, Brak and Elric. Barbarians of Lemuria has been acclaimed by many as one of the best roleplaying games of this genre. This 'Legendary' version features updates and extra goodies to give you much more swords & sorcery role playing goodness.
Download or read book Bulletin written by and published by . This book was released on 1903 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sky Vistas written by Craig Crossen and published by Springer Science & Business Media. This book was released on 2004-01-27 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Praise for Craig Crossen and Gerald Rhemann's, Sky Vistas Astronomy "This is a practical and stunningly beautiful guide whose core is a descriptive tour of the best celestial sights: open and globular clusters, nebulae, galaxies, and large areas of sky. The photos in black and white and color, are magnificent. The text goes beyond ordinary descriptions to tell the reader something about each object’s nature." Sky & Telescope "Packed with information that I have encountered nowhere else in amateur-astronomy literature. Sky Vistas also includes 48 full-page color astrophotos by Gerald Rhemann, most of which are magnificent."
Download or read book Starlight written by Keith Robinson and published by Springer Science & Business Media. This book was released on 2009-10-03 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a book about the physics of stars and starlight. The story of starlight is truly fascinating. Astronomers analyze and interpret the light from stars using photometry and spectroscopy, then inspirational detective work combines with the laws of physics to reveal the temperatures, masses, luminosities and outer structure of these far away points of light. The laws of physics themselves enable us to journey to the very center of a star and to understand its inner structure and source of energy! Starlight provides an in-depth study of stellar astrophysics that requires only basic high school mathematics and physics, making it accessible to all amateur astronomers. Starlight teaches amateur astronomers about the physics of stars and starlight in a friendly, easy-to-read way. The reader will take away a profoundly deeper understanding of this truly fascinating subject – and find his practical observations more rewarding and fulfilling as a result.
Download or read book Colours of the Stars written by David Malin and published by CUP Archive. This book was released on 1984-08-30 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Colours of the stars uses spectacular photography to shw the coulours of stars, galaxies, and nebulae." -- dust jacket.
Download or read book Understanding the Universe written by George Greenstein and published by Cambridge University Press. This book was released on 2013-02-18 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: A student-active introduction to astronomy, emphasizing inquiry learning so students will clearly understand our universe and the scientific method. Within-text and end-of-chapter questions check understanding of concepts and require the student to think critically through astronomy-based problems. 'Nature of Science' and 'Detectives on the Case' sections in each chapter encourage students to take on the role of a scientist and so develop an understanding of how scientific progress is made, leading students through a chain of arguments of forming and testing hypotheses, in the context of specific astronomical topics. By focusing on key topics, the student is able to develop a deeper understanding of the core areas of astronomy. Math is used to make intuitive points and kept simple by using a two-track system to first describe the logic of the calculation followed by a more detailed example. Simple illustrations support the text and step students through concepts visually.
Download or read book The Influence of Mass Loss on the Evolution of a Red Giant Star of 5 Solar Masses written by Jack Eugene Forbes and published by . This book was released on 1966 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Library of Congress Subject Headings written by Library of Congress and published by . This book was released on 1991 with total page 1704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water in the Universe written by Arnold Hanslmeier and published by Springer Science & Business Media. This book was released on 2010-09-29 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to its specific chemical and physical properties, water is essential for life on Earth. And it is assumed that this would be the case for extraterrestrial life as well. Therefore it is important to investigate where water can be found in the Universe. Although there are places that are completely dry, places where the last rainfall happened probably several 100 million years ago, surprisingly this substance is quite omnipresent. In the outer solar system the large satellites of Jupiter and Saturn are covered by a thick layer of ice that could be hiding a liquid ocean below. This of course brings up the question of whether the recently detected extrasolar planets could have some water on their surfaces and how we can detect this. Water molecules are also found in interstellar gas and dust clouds. This book begins with an introductory chapter reviewing the physical and chemical properties of water. Then it illuminates the apparent connection between water and life. This is followed by chapters dealing with our current knowledge of water in the solar system, followed by a discussion concerning the potential presence and possible detection of water on exoplanets. The signature of water in interstellar space and stars are reviewed before the origin of water in the Universe is finally discussed. The book ends with an appendix on detection methods, satellite missions and astrophysical concepts touched upon in the main parts of the book. The search for water in the Universe is related to the search for extraterrestrial life and is of fundamental importance for astrophysics, astrobiology and other related topics. This book therefore addresses students and researchers in these fields.
Download or read book Report of the Dominion Agrostologist written by Canada. Department of Agriculture. Forage Crops Division and published by . This book was released on 1923 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
