On The Formation Of The Most Massive Stars In The Galaxy
Download On The Formation Of The Most Massive Stars In The Galaxy full books in PDF, epub, and Kindle. Read online free On The Formation Of The Most Massive Stars In The Galaxy ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
| Author | : Roberto J. Galván-Madrid |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 131 |
| Release | : 2012-06-08 |
| Genre | : Science |
| ISBN | : 1461433088 |
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 | : Volker Bromm |
| Publisher | : Springer |
| Total Pages | : 240 |
| Release | : 2016-09-07 |
| Genre | : Science |
| ISBN | : 9783642119644 |
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 | : Emily M. Levesque |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2017 |
| Genre | : Astrophysics |
| ISBN | : 9780750313292 |
"Astrophysics of Red Supergiants' is the first book of its kind devoted to our current knowledge of red supergiant stars, a key evolutionary phase that is critical to our larger understanding of massive stars. It provides a comprehensive overview of the fundamental physical properties of red supergiants, their evolution, and their extragalactic and cosmological applications. It serves as a reference for researchers from a broad range of fields (including stellar astrophysics, supernovae, and high-redshift galaxies) who are interested in red supergiants as extreme stages of stellar evolution, dust producers, supernova progenitors, extragalactic metallicity indicators, members of massive binaries and mergers, or simply as compelling objects in their own right. The book is accessible to a range of experience levels, from graduate students up to senior researchers."--Source : résumé de l'éditeur.
| Author | : Andreas Zezas |
| Publisher | : Cambridge University Press |
| Total Pages | : 318 |
| Release | : 2021-04-29 |
| Genre | : Science |
| ISBN | : 1316877523 |
Star-formation is one of the key processes that shape the current state and evolution of galaxies. This volume provides a comprehensive presentation of the different methods used to measure the intensity of recent or on-going star-forming activity in galaxies, discussing their advantages and complications in detail. It includes a thorough overview of the theoretical underpinnings of star-formation rate indicators, including topics such as stellar evolution and stellar spectra, the stellar initial mass function, and the physical conditions in the interstellar medium. The authors bring together in one place detailed and comparative discussions of traditional and new star-formation rate indicators, star-formation rate measurements in different spatial scales, and comparisons of star-formation rate indicators probing different stellar populations, along with the corresponding theoretical background. This is a useful reference for students and researchers working in the field of extragalactic astrophysics and studying star-formation in local and higher-redshift galaxies.
| Author | : Edvige Corbelli |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 551 |
| Release | : 2007-10-06 |
| Genre | : Science |
| ISBN | : 1402034075 |
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.
| Author | : Mark R. Krumholz |
| Publisher | : World Scientific Publishing Company |
| Total Pages | : 507 |
| Release | : 2017 |
| Genre | : Science |
| ISBN | : 9789813142039 |
Observing the cold interstellar medium -- Observing young stars -- Chemistry and thermodynamics -- Gas flows and turbulence -- Magnetic fields and magnetized turbulence -- Gravitational instability and collapse -- Stellar feedback -- Giant molecular clouds escales -- The star formation rate at galactic scales: observations -- The star formation rate at galactic scales: theory -- Stellar clustering -- The initial mass function: observations -- The initial mass function: theory -- Protostellar disks and outflows: observations -- Protostellar disks and outflows: theory -- Protostar formation -- Protostellar evolution -- Massive star formation -- The first stars -- Late-stage stars and disks -- The transition to planet formation
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 324 |
| Release | : 2011-02-04 |
| Genre | : Science |
| ISBN | : 0309157994 |
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 | : Pierre-Yves Bely |
| Publisher | : Cambridge University Press |
| Total Pages | : 361 |
| Release | : 2017-03-23 |
| Genre | : Science |
| ISBN | : 131661526X |
Contains 250 questions and answers about astronomy, particular for the amateur astronomer.
| Author | : Richard Hinckley Allen |
| Publisher | : |
| Total Pages | : 598 |
| Release | : 1899 |
| Genre | : Constellations |
| ISBN | : |
| Author | : Jorick S. Vink |
| Publisher | : Springer |
| Total Pages | : 277 |
| Release | : 2014-10-25 |
| Genre | : Science |
| ISBN | : 331909596X |
This book presents the status of research on very massive stars in the Universe. While it has been claimed that stars with over 100 solar masses existed in the very early Universe, recent studies have also discussed the existence and deaths of stars up to 300 solar masses in the local Universe. This represents a paradigm shift for the stellar upper-mass limit, which may have major implications far beyond the field of stellar physics. The book comprises 7 chapters, which describe this discipline and provide sufficient background and introductory content for graduate (PhD) students and researchers from different branches of astronomy to be able to enter this exciting new field of very massive stars.
