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Author : Katharine Grace Johnston
Publisher :
ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (744 download)
Download or read book Observational Signatures of Massive Star Formation written by Katharine Grace Johnston and published by . This book was released on 2011 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Katharine Grace Johnston
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (744 download)
Download or read book Observational Signatures of Massive Star Formation written by Katharine Grace Johnston and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Edward B. Churchwell
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (313 download)
Download or read book Massive Star Formation written by Edward B. Churchwell and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roberto J. Galván-Madrid
Publisher : Springer Science & Business Media
ISBN 13 : 1461433088
Total Pages : 131 pages
Book Rating : 4.4/5 (614 download)
Download or read book On the Formation of the Most Massive Stars in the Galaxy written by Roberto J. Galván-Madrid and published by Springer Science & Business Media. This book was released on 2012-06-08 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most massive stars in the galaxy - those with more than 15 to 20 solar masses - are lilkely to ionize their surroundings before they reach their final mass. How can they accrete in spite of the presence of over-pressurized gas? This thesis presents results of Submillimeter Array (SMA) and Very Large Array (VLA) studies of massive star formation regions in the early stages of ionization, as well as an analysis of numerical simulations of the evolution of these young HII regions. The results favor a picture in which very massive stars form in accretion flows that are partially ionized and that keep accreting material from their environment.
Author : Heather Danielle Blythe Cooper
Publisher :
ISBN 13 :
Total Pages : 273 pages
Book Rating : 4.:/5 (879 download)
Download or read book Observational Studies of Regions of Massive Star Formation written by Heather Danielle Blythe Cooper and published by . This book was released on 2013 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Petr Kabáth
Publisher : Springer Nature
ISBN 13 : 3030385094
Total Pages : 418 pages
Book Rating : 4.0/5 (33 download)
Download or read book Reviews in Frontiers of Modern Astrophysics written by Petr Kabáth and published by Springer Nature. This book was released on 2020-06-17 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a collection of focused review papers on the advances in topics in modern astronomy, astrophysics, cosmology and planetary science. The chapters are written by expert members of an EU-funded ERASMUS+ program of strategic partnership between several European institutes. The 13 reviews comprise the topics: Space debris, optical measurements Meteors, light from comets and asteroids Extrasolar enigmas: from disintegrating exoplanets to exo-asteroids Physical conditions and chemical abundances in photoionized nebulae from optical spectra Observational Constraints on the Common Envelope Phase A modern guide to quantitative spectroscopy of massive OB stars Explosion mechanisms of core-collapse supernovae and their observational signatures Low-mass and substellar eclipsing binaries in stellar clusters Globular cluster systems and Galaxy Formation Hot atmospheres of galaxies, groups, and clusters of galaxies The establishment of the Standard Cosmological Model through observations Exploiting solar visible-range observations by inversion techniques: from flows in the solar subsurface to a flaring atmosphere Starburst galaxies The book is intended for the general astronomical community as well as for advanced students who could use it as a guideline, inspiration and overview for their future careers in astronomy.
Author : Peter K. Sollins
Publisher :
ISBN 13 :
Total Pages : 163 pages
Book Rating : 4.:/5 (625 download)
Download or read book Accretion and Outflow in Massive Star Formation written by Peter K. Sollins and published by . This book was released on 2005 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andre Maeder
Publisher : Springer Science & Business Media
ISBN 13 : 3540769498
Total Pages : 832 pages
Book Rating : 4.5/5 (47 download)
Download or read book Physics, Formation and Evolution of Rotating Stars written by Andre Maeder and published by Springer Science & Business Media. This book was released on 2008-12-19 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotation is ubiquitous at each step of stellar evolution, from star formation to the final stages, and it affects the course of evolution, the timescales and nucleosynthesis. Stellar rotation is also an essential prerequisite for the occurrence of Gamma-Ray Bursts. In this book the author thoroughly examines the basic mechanical and thermal effects of rotation, their influence on mass loss by stellar winds, the effects of differential rotation and its associated instabilities, the relation with magnetic fields and the evolution of the internal and surface rotation. Further, he discusses the numerous observational signatures of rotational effects obtained from spectroscopy and interferometric observations, as well as from chemical abundance determinations, helioseismology and asteroseismology, etc. On an introductory level, this book presents in a didactical way the basic concepts of stellar structure and evolution in "track 1" chapters. The other more specialized chapters form an advanced course on the graduate level and will further serve as a valuable reference work for professional astrophysicists.
Author : Ke Wang
Publisher : Springer
ISBN 13 : 9783662524282
Total Pages : 0 pages
Book Rating : 4.5/5 (242 download)
Download or read book The Earliest Stages of Massive Clustered Star Formation: Fragmentation of Infrared Dark Clouds written by Ke Wang and published by Springer. This book was released on 2016-08-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an in-depth, high-resolution observational study on the very beginning of the formation process: the fragmentation of dense molecular clouds known as infrared dark clouds (IRDCs). Using the Submillimeter Array (SMA) and Very Large Array (VLA) radio interferometers, the author has discovered a common picture of hierarchical fragmentation that challenges some of the leading theoretical models and suggests a new, observation-driven understanding of how massive star formation in clustered environments may begin: it is initiated by the hierarchical fragmentation of a dense filament from 10 pc down to 0.01 pc, and the stellar mass buildup is simultaneously fed by hierarchical accretion at similar scales. The new scenario points out the importance of turbulence and filamentary structure, which are now receiving increasing attention and further tests from both observers and theorists.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309157994
Total Pages : 324 pages
Book Rating : 4.3/5 (91 download)
Download or read book New Worlds, New Horizons in Astronomy and Astrophysics written by National Research Council and published by National Academies Press. This book was released on 2011-02-04 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven by discoveries, and enabled by leaps in technology and imagination, our understanding of the universe has changed dramatically during the course of the last few decades. The fields of astronomy and astrophysics are making new connections to physics, chemistry, biology, and computer science. Based on a broad and comprehensive survey of scientific opportunities, infrastructure, and organization in a national and international context, New Worlds, New Horizons in Astronomy and Astrophysics outlines a plan for ground- and space- based astronomy and astrophysics for the decade of the 2010's. Realizing these scientific opportunities is contingent upon maintaining and strengthening the foundations of the research enterprise including technological development, theory, computation and data handling, laboratory experiments, and human resources. New Worlds, New Horizons in Astronomy and Astrophysics proposes enhancing innovative but moderate-cost programs in space and on the ground that will enable the community to respond rapidly and flexibly to new scientific discoveries. The book recommends beginning construction on survey telescopes in space and on the ground to investigate the nature of dark energy, as well as the next generation of large ground-based giant optical telescopes and a new class of space-based gravitational observatory to observe the merging of distant black holes and precisely test theories of gravity. New Worlds, New Horizons in Astronomy and Astrophysics recommends a balanced and executable program that will support research surrounding the most profound questions about the cosmos. The discoveries ahead will facilitate the search for habitable planets, shed light on dark energy and dark matter, and aid our understanding of the history of the universe and how the earliest stars and galaxies formed. The book is a useful resource for agencies supporting the field of astronomy and astrophysics, the Congressional committees with jurisdiction over those agencies, the scientific community, and the public.
Author : Volker Bromm
Publisher : Springer
ISBN 13 : 9783642119644
Total Pages : 240 pages
Book Rating : 4.1/5 (196 download)
Download or read book The First Stars written by Volker Bromm and published by Springer. This book was released on 2016-09-07 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of the first stars (Pop III stars) and galaxies is one of the great outstanding challenges in modern astrophysics and cosmology. The first stars are likely key drivers for early cosmic evolution and will be at the center of attention over the next decade. The best available space and ground-based telescopes like the Hubble Space Telescope probe the Universe to high redshifts and provide us with tantalizing hints; but they cannot yet directly detect the first generation of stars and the formation of the first galaxies. This is left as key science for future telecopes like the James Webb Space Telescope. This book is based in part on classroom tested lectures related to Pop III stars, but also draws from the author's review articles of the main physical principles involved. The book will thus combine pedagogical introductory chapters with more advanced ones to survey the cutting-edge advances from the frontier of research. It covers the theory of first star formation, the relation between first stars and dark matter, their impact on cosmology, their observational signatures, the transition to normal star formation as well as the assembly of the first galaxies. It will prepare students for interpreting observational findings and their cosmological implications.
Author : J.E. Dyson
Publisher : CRC Press
ISBN 13 : 100016313X
Total Pages : 207 pages
Book Rating : 4.0/5 (1 download)
Download or read book The Physics of the Interstellar Medium written by J.E. Dyson and published by CRC Press. This book was released on 2020-07-26 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition of The Physics of the Interstellar Medium continues to introduce advanced undergraduates to the fundamental processes and the wide range of disciplines needed to understand observations of the interstellar medium and its role in the Milky Way galaxy. The book is suitable for undergraduate students studying physics, astronomy, and astrophysics. The book also provides concise and straightforward discussions of interstellar physics and chemistry that are useful for more experienced readers. The book leads readers through the range of physical processes operating on both large and small scales that occur in the interstellar medium. It explores the relationship between the dusty, tenuous gas in interstellar space and the formation of stars and planets. This new edition also describes exciting developments in the field of astrochemistry and its interaction with interstellar physics, and the roles played by interstellar dust grains in interstellar physics and chemistry. Simple models in each chapter, together with problems at the end of each chapter, encompass interdisciplinary applications in atomic, molecular, solid state, and surface physics, and gas dynamics. This popular textbook provides a useful overview and grounding in the study of the interstellar medium and brings insight into many aspects of physics. Features An authoritative textbook in the field at this academic level Provides a wide introduction to the interstellar medium whilst remaining accessible and concise Revised throughout, presenting a modern understanding of the interstellar medium
Author : Henrik Beuther
Publisher :
ISBN 13 :
Total Pages : 514 pages
Book Rating : 4.F/5 ( download)
Download or read book Massive Star Formation written by Henrik Beuther and published by . This book was released on 2008 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Henrik Beuther
Publisher : University of Arizona Press
ISBN 13 : 0816531242
Total Pages : 945 pages
Book Rating : 4.8/5 (165 download)
Download or read book Protostars and Planets VI written by Henrik Beuther and published by University of Arizona Press. This book was released on 2014-12-18 with total page 945 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a conference held in Heidelberg, Germany, July 15-20, 2013.
Author : J.E Dyson
Publisher : CRC Press
ISBN 13 : 9780585368115
Total Pages : 184 pages
Book Rating : 4.3/5 (681 download)
Download or read book The Physics of the Interstellar Medium, Second Edition written by J.E Dyson and published by CRC Press. This book was released on 1997-01-01 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book leads the advanced undergraduate through the wide range of disciplines related to an understanding of the interstellar medium and is suitable for any student studying either physics or astrophysics. The study of the interstellar medium incorporates a large range of physical More...processes on both large and small scales all of which are covered in this text. Together with the inclusion of simple models and problems at the end of each chapter this text provides a comprehensive overview and grounding in the study of the interstellar medium.
Author : Alexander Leonard DeSouza
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (17 download)
Download or read book Observational Signatures from Self-gravitating Protostellar Disks written by Alexander Leonard DeSouza and published by . This book was released on 2014 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protostellar disks are the ubiquitous corollary outcome of the angular momentum con-serving, gravitational collapse of molecular cloud cores into stars. Disks are an essential component of the star formation process, mediating the accretion of material onto the pro-tostar, and redistributing excess angular momentum during the collapse. We present a model to explain the observed correlation between mass accretion rates Ṁ and stellar mass M ∗ that has been inferred from the observations of intermediate to upper mass T Tauri stars--that is Ṁ ∝ M 1 . 3 ± 0 . 3 ∗ . We explain this correlation within the framework of gravit ationally driven torques parameterized in terms of Toomre's Q criterion. Our models reproduce both the ob- served correlation and spread in the Ṁ − M ∗ relation as has been observed for protostars with masses of 0 . 2 M ⊙ ≤ M ∗ ≤ 3 . 0 M ⊙ , such as those found in the Ophiuchus and Taurus star forming regions. We also examine the formation and long-term evolution of pri mordial protostellar disks har- bored by the first stars (Population III stars), using 2+1D nu merical hydrodynamics simulations in the thin-disk limit. The disks that form in the primordial environment are very massive and subject to vigorous fragmentation. Fragments torqued inward due to gravitational interactions with sub-structure within the disk give rise to accretion an d luminosity bursts several orders of magnitude above the mean rate--the first evidence for the burs t mode of accretion among Pop- ulation III stars. By considering the cosmological landscape in this epoch, we argue from the Jeans criterion for the existence of clusters of Population III stars. A simultaneity of burst mode accretion events among several cluster members results in fluctuations that are nearly 1000 × greater than the mean cluster luminosity, resulting in a total luminosity above 10 8 L ⊙ . This phenomenon arises solely as a result of the gravitational-instability-driven episodic fragmen- tation and accretion that characterizes this early stage of protostellar evolution. We speculate as to how these extrema may provide a window through which next-generation telescopes will be able to gather observational evidence for the existence of the first stars.
Author : E. Churchwell
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (125 download)
Download or read book Massive Star Formation: the Role of Bipolar Outflows written by E. Churchwell and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
