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50 Years Of Brown Dwarfs
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Book Synopsis 50 Years of Brown Dwarfs by : Viki Joergens
Download or read book 50 Years of Brown Dwarfs written by Viki Joergens and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The years 2012/2013 mark the 50th anniversary of the theoretical prediction that Brown Dwarfs, i.e. degenerate objects which are just not massive enough to sustain stable hydrogen fusion, exist. Some 20 years after their discovery, how Brown Dwarfs form is still one of the main open questions in the theory of star formation. In this volume, the pioneers of Brown Dwarf research review the history of the theoretical prediction and the subsequent discovery of Brown Dwarfs. After an introduction, written by Viki Joergens, reviewing Shiv Kumar's theoretical prediction of the existence of brown dwarfs, Takenori Nakano reviews his and Hayashi's calculation of the Hydrogen Burning Minimum Mass. Both predictions happened in the early 1960s. Jill Tarter then writes on the introduction of the term 'Brown Dwarf', before Ben Oppenheimer, Rafael Rebolo and Gibor Basri describe their first discovery of Brown Dwarfs in the 1990s. Lastly, Michael Cushing and Isabelle Baraffe describe the development of the field to the current state of the art. While the book is mainly aimed at the Brown Dwarf research community, the description of the pioneering period in a scientific field will attract general readers interested in astronomy as well.
Book Synopsis The Initial Mass Function 50 Years Later by : Edvige Corbelli
Download or read book The Initial Mass Function 50 Years Later written by Edvige Corbelli and published by Springer Science & Business Media. This book was released on 2007-10-06 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theideatocelebrate50yearsoftheSalpeterIMFoccurredduringtherecent IAU General Assembly in Sydney, Australia. Indeed, it was from Australia that in July 1954 Ed Salpeter submitted his famous paper "The Luminosity Function and Stellar Evolution" with the rst derivation of the empirical stellar IMF. This contribution was to become one of the most famous astrophysics papers of the last 50 years. Here, Ed Salpeter introduced the terms "original mass function" and "original luminosity function", and estimated the pro- bility for the creation of stars of given mass at a particular time, now known as the "Salpeter Initial Mass Function", or IMF. The paper was written at the Australian National University in Canberra on leave of absence from Cornell University (USA) and was published in 1955 as 7 page note in the Astroph- ical Journal Vol. 121, page 161. To celabrate the 50th anniversary of the IMF, along with Ed Salpeter’s 80th birthday, we have organized a special meeting that brought together scientists involved in the empirical determination of this fundamental quantity in a va- ety of astrophysical contexts and other scientists fascinated by the deep imp- cations of the IMF on star formation theories, on the physical conditions of the gas before and after star formation, and on galactic evolution and cosmology. The meeting took place in one of the most beautiful spots of the Tuscan countryside, far from the noise and haste of everyday life.
Book Synopsis Very Low-Mass Stars and Brown Dwarfs by : Rafael Rebolo
Download or read book Very Low-Mass Stars and Brown Dwarfs written by Rafael Rebolo and published by Cambridge University Press. This book was released on 2000-11-27 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a state-of-the-art review of our current knowledge of brown dwarfs and very low-mass stars. The hunt for and study of these elusive objects is currently one of the most dynamic areas of research in astronomy for two reasons. Brown dwarfs bridge the gap between stars and planets, and they may constitute an important part of the 'dark matter' of the Universe. This volume presents review articles from a team of international authorities who gathered at a conference in La Palma to assess the spectacular progress that has been made in this field in the last few years.
Book Synopsis The Scientific American Book of the Cosmos by : David Levy
Download or read book The Scientific American Book of the Cosmos written by David Levy and published by St. Martin's Press. This book was released on 2014-07-22 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, the entire body of our scientific knowledge of the universe is available in one definitive volume. Scientific American, the oldest and most popular science magazine in the world, has prepared the most comprehensive and comprehensible book on the subject ever. Under the direction of renowned astronomer David H. Levy, this spectacular book assembles the best minds in science to give clear and accessible explanations of the nature of the cosmos. Newly commissioned essays by working scientists at the top of their fields and classic writings by such luminaries as Albert Einstein, Francis Crick, and Carl Sagan take us to the frontiers of space and time-from sub-atomic particles to the edge of the universe. Both thoughtful and provocative, this book asks-and answers-the big questions, such as: o How did our solar system evolve? o What forces lie at the center of the atom? o What is the size of the universe? o What is dark matter? o What is the possibility of extraterrestrial life? o What is the importance of superstrings? o How do galaxies form? Dazzling full-color and black-and-white photographs aid in articulating the latest theories about the size, age, nature, and expansion of the universe, and make this book a delight to behold. Essays are grouped by topic, from the largest phenomena, such as the formation of the universe, down to the smallest detail, such as the makeup of an atom. In addition, each section contains an illuminating introduction by David Levy that binds the essays together and creates a whole picture. The Scientific American Book of the Cosmos is a valuable addition to the bookshelf of both professional astronomers and science enthusiasts alike.
Book Synopsis New Worlds in the Cosmos by : Michel Mayor
Download or read book New Worlds in the Cosmos written by Michel Mayor and published by Cambridge University Press. This book was released on 2003-09-25 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
Book Synopsis A Story of More Than 5000 Worlds by : Dr. Alejandro Ruiz Rivera
Download or read book A Story of More Than 5000 Worlds written by Dr. Alejandro Ruiz Rivera and published by Alejandro Ruiz Rivera. This book was released on 2024-08-02 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Immerse yourself on an interstellar journey through "A Story of More than 5000 Worlds'' as it explores the fascinating story of celestial discovery and the enduring quest of researchers and scientists to find life beyond Earth. This comprehensive book navigates the intricacies of star and planet formation, shedding light on the enigmatic life cycle of stars like our Sun to pulsars and black holes and the dynamic processes that define the fate of planets. Marvel at the ingenuity of exoplanet detection methods, from the accurate detection of stellar wobbles to the precise monitoring of starlight dimming during transits, and peer into the future with innovative techniques that take advantage of the deformation or curvature of the space-time caused by massive objects. The classification of these distant worlds from rocky planets to gas giants lays the groundwork for the book's climax: the search for life. Exploring biosignatures and technosignatures, from the organic and chemical traces of potential life, to the echoes of advanced technological civilizations, this book expands our understanding of the dynamicity of the universe and our place within it. It's an invitation to ponder humanity's greatest question – are we alone? – while navigating through the Drake Equation and other Search for Extraterrestrial Intelligence (SETI) concepts, and the silence that has prompted ideas like the Fermi Paradox, and the Great Filter. The book, in addition to acting as an engaging read for anyone interested in these subjects and given the number of topics included and the breadth of the discussions, could also be used as a complementary textbook for students at both high school and non-science bachelor levels, in introductory or fundamental astronomy courses.
Download or read book The Lost Planets written by John Wenz and published by MIT Press. This book was released on 2019-10-08 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fascinating account of the pioneering astronomer who claimed (erroneously) to have discovered a planet outside the solar system. There are innumerable planets revolving around innumerable stars across our galaxy. Between 2009 and 2018, NASA's Kepler space telescope discovered thousands of them. But exoplanets—planets outside the solar system—appeared in science fiction before they appeared in telescopes. Astronomers in the early decades of the twentieth century spent entire careers searching for planets in other stellar systems. In The Lost Planets, John Wenz offers an account of the pioneering astronomer Peter van de Kamp, who was one of the first to claim discovery of exoplanets. Van de Kamp, working at Swarthmore College's observatory, announced in 1963 that he had identified a planet around Barnard's Star, the second-closest star system to the Sun. He cited the deviations in Barnard's star's path—“wobbles” that suggested a large object was lurching around the star. Van de Kamp became something of a celebrity (appearing on a television show with “Mr. Wizard,” Don Henry), but subsequent research did not support his claims. Wenz describes van de Kamp's stubborn refusal to accept that he was wrong, discusses the evidence found by other researchers, and explains recent advances in exoplanet detection, including transit, radial velocity, direct imaging, and microlensing. Van de Kamp retired from Swarthmore in 1972, and died in 1995 at 93. In 2009, Swarthmore named its new observatory the Peter van de Kamp Observatory. In the 1990s, astronomers discovered and confirmed the first planet outside our solar system. In 2018, an exoplanet was detected around Barnard's Star—not, however, the one van de Kamp thought he had discovered in 1963.
Book Synopsis Through the Eyes of Hubble by : R Naeye
Download or read book Through the Eyes of Hubble written by R Naeye and published by CRC Press. This book was released on 1997-09-01 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Robert Naeye is renowned for his lucid contributions to Astronomy, the world's biggest selling astronomy magazine. In Through the Eyes of Hubble: The Birth, Life and Violent Death of Stars, he uses 100 striking color images from the Hubble Space Telescope to illuminate the mind-stretching story of how stars are born, live, and die. Although focusing on astrophysics, the account is compelling, equation free, and accessible to everyone. In addition, there are eight beautiful paintings to appreciate, including works by the most famous living space artist, Michael Carroll.
Download or read book Exoplanets written by John Mason and published by Springer Science & Business Media. This book was released on 2008-08-29 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first collection of review articles in one volume covering the very latest developments in exoplanet research. This edited, multi-author volume will be an invaluable introduction and reference to all key aspects in the field this field. The reviews cover topics such as the properties of known exoplanets and searching for exoplanets in the stellar graveyard. The book provides an easily accessible point of reference in a fast moving and exciting field.
Book Synopsis Sources Of Dark Matter In The Universe - Proceedings Of The 1st International Symposium by : David B Cline
Download or read book Sources Of Dark Matter In The Universe - Proceedings Of The 1st International Symposium written by David B Cline and published by World Scientific. This book was released on 1995-02-21 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Astronomical Observatory Of Japan Publisher :World Scientific ISBN 13 :9813278536 Total Pages :1054 pages Book Rating :4.8/5 (132 download)
Book Synopsis Handbook Of Scientific Tables by : National Astronomical Observatory Of Japan
Download or read book Handbook Of Scientific Tables written by National Astronomical Observatory Of Japan and published by World Scientific. This book was released on 2022-04-07 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt: This data book of scientific information is an essential guide for all STEM researchers, teachers and students. It comprises six sections on astronomy, meteorology, physics/chemistry, earth science, biology, and environmental science.The book is useful not only for researchers and engineers, but also for science writers, as it covers carefully selected and important data that have been reviewed by experts from diverse fields for over 90 years.
Book Synopsis Stars and Their Spectra by : James B. Kaler
Download or read book Stars and Their Spectra written by James B. Kaler and published by Cambridge University Press. This book was released on 2011-07-28 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revised and expanded, the second edition of this popular book provides a thorough introduction to stellar spectra. Each chapter explores a different star type, including new classes L and T. With modern digital spectra and updates from two decades of astronomical discoveries, it is invaluable for amateur astronomers and students.
Download or read book CNN主播教你說關鍵時刻的英語 written by LiveABC編輯群 and published by 希伯崙股份有限公司. This book was released on 2018 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: start-up 新創企業 foot traffic 客流量 superbug（不能被抗生素殺滅的）超級病菌 influenza（= the flu） 流行性感冒 microplastics 塑膠微粒 genetically modified 基因改造的 新聞主播都用這些關鍵字彙，你認得幾個呢? CNN官方授權 LiveABC主編為你解析重點新聞單字、用語 讓你說一口流利英語，隨時暢談全球大事！ 快速聽看懂新聞英語，重點在掌握關鍵字彙！ 新聞英語中往往夾雜特殊詞彙，可能是時下流行語、涉及相關知識的專業術語等，即使學習英語多年，要想跟上即時英語新聞的播報速度，完全理解一整篇國際英語新聞，仍舊不是件易事。如果能夠迅速掌握各領域新聞英語的關鍵字彙，即使無法從頭到尾聽懂主播所說的每一個字，但是一定能夠快速擷取新聞重點，進而汲取新聞新知，累積英語實力！ 熟悉國際新聞中高頻率出現的新聞用語，讓你輕鬆聽懂CNN！ 本書取材自CNN，精選近年來的重點新聞共計35篇，彙整5大主題新聞關鍵字彙，包含商業、科技、科學、保健及環境等多元領域的新聞要事。在每一大主題新聞之前，會先彙整該類型新聞相關的關鍵字彙，這些字彙都是國際新聞中高頻率出現的新聞用語，將有效幫助快速掌握新聞重點。 關鍵字彙依詞性區分為三大類，系統化條列字彙之音標、詞性、字義及例句，並提供詳盡解說。同時輔以同反義字、相關用語、補充說明等延伸學習。每篇文章皆採中英對照，幫助讀者迅速了解文章內容。針對各篇文章彙整重點單字，提供情境例句加深學習印象。延伸學習說明文章內的重要片語、常用口語或句型解析。此外，豐富的圖片、圖表及數據等相關資訊補充，讓閱讀新聞訪談兼具知識性及實用性。每篇文章最後皆附上課後測驗，學完可立即驗收學習成效。 目錄介紹 商業 Business 商業新聞關鍵字彙 Key Words for Business News 新零售逆勢崛起無人商店遍地開花 Cashierless Stores 比特幣一飛沖天將成下一個泡沫？ The New Age of Currency 網購未來新趨勢虛擬實境電商 3D-Simulated Shopping 蓬勃發展的非洲新興市場——奈及利亞 Luxurious Lagos 航空公司機票超賣陋習大剖析 Plain Problems in the Air 轉角遇見販賣機日本一日飲食就靠它！ Coin-Operated Convenience 無現金社會免接觸支付、機器人與APP交易的未來 Currency to Come 科學 Science 科學新聞關鍵字彙 Key Words for Science News 天才是先天還是後天的？ Inspiration or Perspiration? 恨者恆恨原來是大腦作崇 Haters Gonna Hate 揭開人腦超級記憶的秘密 Inside the Palace of Memory 作弊是人性使然？科學家解密 Penchant for Cheating 科技 Technology 科技新聞關鍵字彙 Key Words for Tech News 新世代仿生環保材料向大自然取經 Web Design 自駕科技再進化！日本車廠追求極致精準與安全性 The Cars of Tomorrow SpaceX 獵鷹重型火箭成功升空 Ready for Liftoff 大廚在我家美味熟食即可印 3D Cooking 行動通訊科技的未來樣貌 Synthetic Sight and Interactive Images 跨越空間侷限機器人帶病童遠端逛博物館 Robotic Remedy 資料儲存新世代DNA編碼與玻璃蝕刻 Immortal Information 虛擬化身特效表演捕捉實戰操演 Performance Capture Pipe Dreams 保健 Health 保健新聞關鍵字彙 Key Words for Health News 及早診斷阿茲海默症十七歲科學家找到解方 A New Hope for Alzheimer’s 一夜之間成了歪果人？都是外國口音症候群惹的禍 Excuse My French Accent 意念控制仿生手臂讓斷肢者重拾人生 Smart Prosthetics 療癒狗醫生溫暖癌症病童的心 Kid’s Best Friend 人工生殖科技大躍進胚胎冷凍25年後成功誕生 Miracle Baby 眼科飛機醫院讓偏鄉眼疾患者重見光明 A Hospital with Wings 臍帶血幹細胞療法為自閉症帶來曙光 Stem Cell Solutions 3D模型立大功顱部連體嬰分割成功 Separation Anxiety 環境 Environment 環境新聞關鍵字彙 Key Words for Environment News 科學家成功移植珊瑚大堡礁復育有望 Lab-Bred Coral to the Rescue 替代能源新選擇：風箏發電 Taking to the Skies 海岸線消失中！氣候變遷否認者不願面對的真相 Blind to a Sea Change 拯救蜜蜂拯救生態 Hanoi’s Honeypot 大象將從非洲大陸消失！ Imperiled Behemoths 拯救地球第一步少吃肉！？ The Search for Sustainable Sustenance 從中途島看人類的垃圾災難！ A Plastic Paradise 第六次大滅絕？雨林中兩棲類聲音消逝露端倪 Echoes of Eradication
Book Synopsis Brown Dwarf Companions to Young Solar an by : Stanimir Metchev
Download or read book Brown Dwarf Companions to Young Solar an written by Stanimir Metchev and published by Universal-Publishers. This book was released on 2006-02 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from an adaptive optics survey conducted with the Palomar and Keck telescopes over 3 years, which measured the frequency of stellar and sub-stellar companions to Sun-like stars. The survey sample contains 266 stars in the 3-10000 million year age range at heliocentric distances between 8 and 200 parsecs and with spectral types between F5-K5. A sub-sample of 101 stars, between 3-500 million years old, were observed in deep exposures with a coronagraph to search for faint sub-stellar companions. A total of 288 candidate companions were discovered around the sample stars, which were re-imaged at subsequent epochs to determine physical association with the candidate host stars by checking for common proper motion. Benefitting from a highly accurate astrometric calibration of the observations, we were able to successfully apply the common proper motion test in the majority of the cases, including stars with proper motions as small as 20 milli-arcseconds/year. The results from the survey include the discovery of three new brown dwarf companions (HD 49197B, HD 203030B, and ScoPMS 214B), 43 new stellar binaries, and a triple system. The physical association of an additional, a priori-suspected, candidate sub-stellar companion to the star HII 1348 is astrometrically confirmed. The newly-discovered and confirmed young brown dwarf companions span a range of spectral types between M5 and T0.5, and will be of prime significance for constraining evolutionary models of young brown dwarfs and extra-solar planets. Based on the 3 new detections of sub-stellar companions in the 101 star sub-sample and following a careful estimate of the survey incompleteness, a Bayesian statistical analysis shows that the frequency of 0.012-0.072 solar-mass brown dwarfs in 30-1600 AU orbits around young solar analogs is 6.8% (-4.9%, +8.3%; 2-sigma limits). While this is a factor of 3 lower than the frequency of stellar companions to G-dwarfs in the same orbital range, it is significantly higher than the frequency of brown dwarfs in 0-3 AU orbits discovered through precision radial velocity surveys. It is also fully consistent with the observed frequency of 0-3 AU extra-solar planets. Thus, the result demonstrates that the radial-velocity "brown dwarf desert" does not extend to wide separations, contrary to previous belief.
Download or read book New Scientist written by and published by . This book was released on 1992 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Scientist written by and published by . This book was released on 1942 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Analysis of Starlight by : John B. Hearnshaw
Download or read book The Analysis of Starlight written by John B. Hearnshaw and published by Cambridge University Press. This book was released on 2014-03-17 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1986, this is the story of the analysis of starlight by astronomical spectroscopy. Beginning with Joseph Fraunhofer's discovery of spectral lines in the early nineteenth century, this new edition continues the story through to the year 2000. In addition to the key discoveries, it presents the cultural and social history of stellar astrophysics by introducing the leading astronomers and their struggles, triumphs and disagreements. Basic concepts in spectroscopy and spectral analysis are included, so both observational and theoretical aspects are described, in a non-mathematical framework. This new edition covers the final decades of the twentieth century, with its major advances in stellar astrophysics: the discovery of extrasolar planets, new classes of stars and the observation of the ultraviolet spectra of stars from satellites. The in-depth coverage makes it essential reading for graduate students working in stellar spectroscopy, professional and amateur astronomers, and historians of science.
