Angular Momentum Evolution Of Young Stars

Author : S Catalano,J.R Stauffer
Publisher : Springer Science & Business Media
Page : 462 pages
File Size : 51,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401135801

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Angular Momentum Evolution of Young Stars by S Catalano,J.R Stauffer Pdf

This book reports the Proceedings of the NATO Advanced Research Workshop on "An gular Momentum Evolution of Young Stars" held from 17 to 21 September 1990 at Noto, Italy. The workshop had its immediate origin in a discussion about the availability of stel lar rotation data, that took place in 1987 at Viana do Castelo Portugal during the NATO meeting, Formation and Evolution of Low Mass Stars. We recognized that nearly 20 years had passed since the last meeting on stellar rotation and that significant progress in the observation of rotation rates in low mass stars had been made. During the last 20 years, new efficient instrumentation (CCD and photon counting de tectors and echelle spectrographs) and new analysis techniques (profile Fourier analysis) have allowed us to measure rotational velocities as low as 1-2 km/s and to reach low mass stars in young clusters. Even with these advances, rotational velocities of low mass stars would have remained challenging to determine if all single, low mass stars later than GO had rotational velocities of order or less than 10 km/sec. Evidence that this is not always the case was first provided by the photometric variability data obtained by van Leeuwen and Alphenaar for K dwarfs in the Pleiades and more recently by the vsini measurements of low mass stars in several young clusters.

Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
Page : 396 pages
File Size : 49,6 Mb
Release : 2007
Category : Science
ISBN : 0521874653

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Star-Disk Interaction in Young Stars (IAU S243) by International Astronomical Union. Symposium Pdf

Reviews latest star-disk interaction region in young stars for graduate students and researchers.

Author : L.A. Willson,R. Stalio
Publisher : Springer Science & Business Media
Page : 366 pages
File Size : 47,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400921054

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Angular Momentum and Mass Loss for Hot Stars by L.A. Willson,R. Stalio Pdf

Fundamental unsolved problems of stellar astrophysics include the effects of angular momentum on stellar structure and evolution, the nature and efficiency of the processes by which angular momentum is redistributed within and lost from stars, and the role that stellar rotation plays in enhancing or driving stellar mass loss. There appears to be a qualitative change in the nature and efficiency of these mechanisms near spectral type FO: hotter (more massive) stars typically retain more angular momentum at least until they reach the main sequence, while cooler stars typically spin down quickly. For the hotter stars, recent work suggests a strong link between the type of pulsation behavior, the mass loss rates, and the rotation velocity. If the same mechanisms are able to drive mass loss from the main sequence A stars, as has recently been proposed, then the current interpretations of a number of observations will be drastically affected: e. g. the ages of clusters may be incorrect by up to a factor of two, and the surface abundances of isotopes of He, Li and Be may no longer give constraints on cosmological nucleosynthesis. There are also effects on the evolution of the abundances of elements in the interstellar medium and on the general evolution of populations of stars. Thus the questions of the mechanisms of angular momentum and mass loss of stars more massive than the sun is important not only for stellar studies but for the foundations of much of modern astrophysics.

Author : Jerome Bouvier,Immo Appenzeller
Publisher : Cambridge University Press
Page : 0 pages
File Size : 47,7 Mb
Release : 2008-01-21
Category : Science
ISBN : 0521874653

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Star-Disk Interaction in Young Stars (IAU S243) by Jerome Bouvier,Immo Appenzeller Pdf

Stars form surrounded by a circumstellar disk which is thought to be the cradle of planets. IAU Symposium 243 highlights the latest developments in understanding the structure and evolution of the star-disk interaction region in young stars, a critical component of our knowledge of star and planetary system formation processes. Discussions review the physical processes thought to be at work at the star-disk interface, confront the predictions of the latest numerical and analytical magnetohydrodynamic models of star-disk-jet systems with observations, and explore the consequences of these processes for stellar angular momentum evolution and inner disk structure. The most recent observational results, computer simulations and theoretical developments in this active field of research are included to provide a unique vision into this central aspect of the star and planet formation problem.

Author : Astronomisches Rechen-Institut
Publisher : Springer Science & Business Media
Page : 1592 pages
File Size : 46,6 Mb
Release : 2013-06-29
Category : Science
ISBN : 9783662123768

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Literature 1991, Part 2 by Astronomisches Rechen-Institut Pdf

"Astronomy and Astrophysics Abstracts" appearing twice a year has become oneof the fundamental publications in the fields of astronomy, astrophysics andneighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. The abstrats are classified under more than a hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world.

Author : Henrik Beuther,Ralf S. Klessen,Cornelis Petrus Dullemond,Thomas K. Henning
Publisher : University of Arizona Press
Page : 945 pages
File Size : 44,9 Mb
Release : 2014-12-18
Category : Science
ISBN : 9780816531240

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Protostars and Planets VI by Henrik Beuther,Ralf S. Klessen,Cornelis Petrus Dullemond,Thomas K. Henning Pdf

Proceedings of a conference held in Heidelberg, Germany, July 15-20, 2013.

Author : Norbert S. Schulz
Publisher : Springer Science & Business Media
Page : 530 pages
File Size : 43,5 Mb
Release : 2012-05-24
Category : Science
ISBN : 9783642239267

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The Formation and Early Evolution of Stars by Norbert S. Schulz Pdf

Starburst regions in nearby and distant galaxies have a profound impact on our understanding of the early universe. This new, substantially updated and extended edition of Norbert Schulz’s unique book "From Dust to Stars" describes complex physical processes involved in the creation and early evolution of stars. It illustrates how these processes reveal themselves from radio wavelengths to high energy X-rays and gamma–rays, with special reference towards high energy signatures. Several sections devoted to key analysis techniques demonstrate how modern research in this field is pursued and new chapters are introduced on massive star formation, proto-planetary disks and observations of young exoplanets. Recent advances and contemporary research on the theory of star formation are explained, as are new observations, specifically from the three great observatories of the Spitzer Space Telescope, the Hubble Space Telescope and the Chandra X-Ray Observatory which all now operate at the same time and make high resolution space based observing in its prime. As indicated by the new title two new chapters have been included on proto-planetary disks and young exoplanets. Many more colour images illustrate attractive old and new topics that have evolved in recent years. The author gives updates in theory, fragmentation, dust, and circumstellar disks and emphasizes and strengthens the targeting of graduate students and young researchers, focusing more on computational approaches in this edition.

Author : Charles J. Lada,N.D. Kylafis
Publisher : Springer Science & Business Media
Page : 779 pages
File Size : 51,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401136426

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The Physics of Star Formation and Early Stellar Evolution by Charles J. Lada,N.D. Kylafis Pdf

The origin of stars is one of the principle mysteries of nature. During the last two decades advances in technology have enabled more progress to be made in the quest to understand stellar origins than at any other time in history. The study of star formation has developed into one of the most important branches of mod ern astrophysical research. A large body of observational data and a considerable literat ure now exist concerning this topic and a 1arge community of international astronomers and physicists devote their efforts attempting to decipher the secrets of stellar birth. Yet, the young astronomerjphysicist or more advanced researcher desiring to obtain a basic background in this area of research must sift through a very diverse and sometimes bewildering literature. A literature which includes research in many discip1ines and sub discip1ines of classical astrophysics from stel lar structure to the interstellar medium and encompasses the entire range of the electromagnetic spectrum from radio to gamma rays. Often, the reward of a suc cessfu1 foray through the current literature is the realization that the results can be obsolete and outdated as soon as the ink is dry in the journal or the conference proceeding in which they are published.

Author : Jack Randolph Jokipii,Charles P. Sonett,Mark S. Giampapa
Publisher : University of Arizona Press
Page : 1060 pages
File Size : 53,6 Mb
Release : 1997-10
Category : Science
ISBN : 0816518254

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Cosmic Winds and the Heliosphere by Jack Randolph Jokipii,Charles P. Sonett,Mark S. Giampapa Pdf

Contributors examine the physics of wind origin and physical phenomena in winds, including heliospheric shocks, magnetohydrodynamic turbulence, and kinetic phenomena--and their interactions with surrounding media. Contributions range from studies of the interstellar cloud surrounding the solar system to solar wind interaction with comets.

Author : Bo Reipurth,David Jewitt,Klaus Keil
Publisher : University of Arizona Press
Page : 994 pages
File Size : 52,6 Mb
Release : 2007
Category : Science
ISBN : 0816526540

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Protostars and Planets V by Bo Reipurth,David Jewitt,Klaus Keil Pdf

'Protostars and Planets V' builds on the latest results from recent advances in ground and space-based astronomy and in numerical computing techniques to offer the most detailed and up-to-date picture of star and planet formation - including the formation and early evolution of our own solar system.

Author : Space Telescope Science Institute (U.S.)
Publisher : Cambridge University Press
Page : 780 pages
File Size : 55,7 Mb
Release : 2000-04-13
Category : Science
ISBN : 0521780918

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Unsolved Problems in Stellar Evolution by Space Telescope Science Institute (U.S.) Pdf

The most comprehensive and up-to-date survey available on stellar structure and evolution, with a special emphasis on currently unsolved problems.

Author : Norbert S. Schulz
Publisher : Springer Science & Business Media
Page : 409 pages
File Size : 46,8 Mb
Release : 2007-03-06
Category : Science
ISBN : 9783540273219

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From Dust To Stars by Norbert S. Schulz Pdf

Studies of stellar formation in galaxies have a profound impact on our understanding of the present and the early universe. The book describes complex physical processes involved in the creation of stars and during their young lives. It illustrates how these processes reveal themselves from radio wavelengths to high energy X-rays and gamma -rays, with special reference towards high energy signatures. Several sections devoted to key analysis techniques demonstrate how modern research in this field is pursued.

Author : Leopoldo Infante
Publisher : UNAM
Page : 262 pages
File Size : 47,5 Mb
Release : 2006
Category : Science
ISBN : 9703228046

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XI IAU Regional Latin American Meeting of Astronomy by Leopoldo Infante Pdf

Author : Michael David Smith
Publisher : Imperial College Press
Page : 268 pages
File Size : 54,6 Mb
Release : 2004
Category : Science
ISBN : 1860945015

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The Origin of Stars by Michael David Smith Pdf

Whre do stars come from and how do they form? These are profound questions which link the nature of our Universe to the roots of mankind. Yet, until a recent revolution in understanding, the proposed answers have been raw speculation. Now, accompanying penetrating observations, a new picture has come into prominence. This book presents the latest astounding observations and scientific ideas covering star formation, star birth and early development. It encompasses all aspects, from the dramatic stories of individual objects, to the collective influence of entire stellar systems. The very first stars to come into existence and the nurturing of planets are discussed to provide the reader with a comprehensive overview. Presenting background information with only the essential mathematics, this book will appeal to scientists wishing to expand their horizons, students seeking solid foundations, and general readers with enquiring minds.

Author : Carl J. Hansen,Steven D Kawaler,Virginia Trimble
Publisher : Springer Science & Business Media
Page : 533 pages
File Size : 40,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781441991102

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Stellar Interiors by Carl J. Hansen,Steven D Kawaler,Virginia Trimble Pdf

The?rsteditionofthistextappearedin1994.Shortlyafterthethirdprinting, our editor suggested that we attempt a second edition because new devel- mentsinstellarstructureandevolutionhadmadeouroriginalworkoutdated. We (the original authors, CJH and SDK) reluctantly agreed but with res- vations due to the e?ort involved. Our initial reluctance disappeared when we were able to convince (cajole, twist the arm of, etc.) our new coauth- colleague Virginia Trimble to join us. (Welcome Virginia!) We (i.e., all three of us) hope that you agree that the present edition is a great improvement compared to the 1994 e?ort. Our objectives in this edition are the same ones we set forth in 1994: Whatyouwill?ndisatextdesignedforourtargetaudience:thety- cal senior undergraduate or beginning graduate student in astronomy or astrophysics who wishes an overview of stellar structure and e- lution with just enough detail to understand the general picture. She or he can go on from there to more specialized texts or directly to the research literature depending on talent and interests. To this end, this text presents the basic physical principles without chasing all the (interesting!) details. For those of you familiar with the ?rst edition, you will ?nd that some things have not been changed substantially (F = ma is still F = ma), while othersde?nitelyhave.Forexample,Chapter2hasbeencompletelyrewritten.