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Author : David K. Churches
Publisher :
ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (895 download)
Download or read book Numerical Simulations of the Chemical Evolution of Galaxies written by David K. Churches and published by . This book was released on 1999 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicolas Gaudin
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (889 download)
Download or read book Chemodynamical Simulations of Evolution of Galaxies written by Nicolas Gaudin and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulations are a useful tool to understand galaxies. In addition to gravitation, other processes can be included for chemodynamical simulations: star formation, feedback of newly formed and evolving stars, metal enrichment, cooling of the interstellar medium, etc. These simulations describe in a self-consistent way the hydrodynamical and chemical evolution of galaxies. I use chemodynamical simulations to build up a model of evolution of the dust mass, solid component of the interstellar medium, in our Galaxy and in dwarf galaxies. I have performed simulations of a massive galaxy to understand localeffects on dust evolution while simulations of dwarf galaxies have been carried out to follow the dust mass in low metallicity environments. Chemodynamical simulations have shown that they are useful. Indeed, local effects and transport mechanisms are naturally included and turn out to be important for a model of dust mass production and destruction.
Author : Francesca Matteucci
Publisher : Springer Science & Business Media
ISBN 13 : 3642224911
Total Pages : 237 pages
Book Rating : 4.6/5 (422 download)
Download or read book Chemical Evolution of Galaxies written by Francesca Matteucci and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term “chemical evolution of galaxies” refers to the evolution of abundances of chemical species in galaxies, which is due to nuclear processes occurring in stars and to gas flows into and out of galaxies. This book deals with the chemical evolution of galaxies of all morphological types (ellipticals, spirals and irregulars) and stresses the importance of the star formation histories in determining the properties of stellar populations in different galaxies. The topic is approached in a didactical and logical manner via galaxy evolution models which are compared with observational results obtained in the last two decades: The reader is given an introduction to the concept of chemical abundances and learns about the main stellar populations in our Galaxy as well as about the classification of galaxy types and their main observables. In the core of the book, the construction and solution of chemical evolution models are discussed in detail, followed by descriptions and interpretations of observations of the chemical evolution of the Milky Way, spheroidal galaxies, irregular galaxies and of cosmic chemical evolution. The aim of this book is to provide an introduction to students as well as to amend our present ideas in research; the book also summarizes the efforts made by authors in the past several years in order to further future research in the field.
Author : F. Matteucci
Publisher : Springer Science & Business Media
ISBN 13 : 9780792366799
Total Pages : 644 pages
Book Rating : 4.3/5 (667 download)
Download or read book The Evolution of The Milky Way written by F. Matteucci and published by Springer Science & Business Media. This book was released on 2000 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review of the most up-to-date observational and theoretical information concerning the chemical evolution of the Milky Way compares the abundances derived from field stars and clusters, giving information on the abundances and dynamics of gas.
Author : Houjun Mo
Publisher : Cambridge University Press
ISBN 13 : 0521857937
Total Pages : 841 pages
Book Rating : 4.5/5 (218 download)
Download or read book Galaxy Formation and Evolution written by Houjun Mo and published by Cambridge University Press. This book was released on 2010-05-20 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coherent introduction for researchers in astronomy, particle physics, and cosmology on the formation and evolution of galaxies.
Author : Nickolay Y. Gnedin
Publisher : Springer
ISBN 13 : 3662478900
Total Pages : 375 pages
Book Rating : 4.6/5 (624 download)
Download or read book Star Formation in Galaxy Evolution: Connecting Numerical Models to Reality written by Nickolay Y. Gnedin and published by Springer. This book was released on 2015-09-09 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the elaborated and updated versions of the 24 lectures given at the 43rd Saas-Fee Advanced Course. Written by four eminent scientists in the field, the book reviews the physical processes related to star formation, starting from cosmological down to galactic scales. It presents a detailed description of the interstellar medium and its link with the star formation. And it describes the main numerical computational techniques designed to solve the equations governing self-gravitating fluids used for modelling of galactic and extra-galactic systems. This book provides a unique framework which is needed to develop and improve the simulation techniques designed for understanding the formation and evolution of galaxies. Presented in an accessible manner it contains the present day state of knowledge of the field. It serves as an entry point and key reference to students and researchers in astronomy, cosmology, and physics.
Author : Carolyn Cynthia Peruta
Publisher :
ISBN 13 : 9781303347573
Total Pages : 135 pages
Book Rating : 4.3/5 (475 download)
Download or read book Modeling Galactic Chemical Evolution in Cosmological Simulations written by Carolyn Cynthia Peruta and published by . This book was released on 2013 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bernard E. J. Pagel
Publisher : Cambridge University Press
ISBN 13 : 9780521559584
Total Pages : 394 pages
Book Rating : 4.5/5 (595 download)
Download or read book Nucleosynthesis and Chemical Evolution of Galaxies written by Bernard E. J. Pagel and published by Cambridge University Press. This book was released on 1997-09-04 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lucid, wide-ranging graduate textbook on the topical subject of galactic chemical evolution - by a pioneer of the field.
Author : Marina Nielsen
Publisher : American Institute of Physics
ISBN 13 : 9780735408487
Total Pages : 0 pages
Book Rating : 4.4/5 (84 download)
Download or read book XI Hadron Physics written by Marina Nielsen and published by American Institute of Physics. This book was released on 2010-12-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The James Webb Space Telescope (JWST), Atacama Large Millimeter Array (ALMA) and a new generation of other ground-based instruments will soon glimpse the first primitive galaxies in the universe, yielding unprecedented insights into the properties of the first stars, the luminosities and spectra of protogalaxies, and the chemical evolution of the early intergalactic medium. In recent years, numerical simulations of the formation of the first stars and galaxies have made significant strides, but considerable work remains to be done to place estimates of the primordial IMF and the morphology, brightness, and colors of primeval galaxies on a firmer footing. The conference was organized around a number of key challenges, with the aim of bringing together leading experts on JWST and ALMA with theorists of early structure formation to forge roadmaps for the next several years.
Author : Elizabeth J. Tasker
Publisher :
ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.:/5 (162 download)
Download or read book Numerical Simulations of the Formation and Evolution of Galaxies written by Elizabeth J. Tasker and published by . This book was released on 2005 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Astronomical Union. Symposium
Publisher : Springer Science & Business Media
ISBN 13 : 9781402004483
Total Pages : 84 pages
Book Rating : 4.0/5 (44 download)
Download or read book Cosmic Chemical Evolution written by International Astronomical Union. Symposium and published by Springer Science & Business Media. This book was released on 2002-03-31 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IAU Symposium papers collected in this volume address virtually all aspects of the problem of nucleosynthesis, galactic chemical evolution, and cosmic chemical evolution. Discussions on theoretical models as well as observational studies are included. Theoretical models of nucleosynthesis in the Big Bang, in the first stellar generations, and in stars and supernovae over the histories of our Galaxy and other galaxies provide a measure of element production over the lifetime of the Universe. Observational studies of abundances in stars, galaxies, gas concentrations in galaxies and clusters of galaxies, the intergalactic medium, and gas clouds at high redshift are reviewed.
Author : Roberto Fusco-Femiano
Publisher :
ISBN 13 :
Total Pages : 568 pages
Book Rating : 4.3/5 (91 download)
Download or read book Chemical Enrichment of Intracluster and Intergalactic Medium written by Roberto Fusco-Femiano and published by . This book was released on 2002 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation The conference was designed as an opportunity of exchange and interaction between two groups of astrophysicists: those studying galaxy clusters, and those studying nucleosynthesis and stellar evolution. The 55 papers consider abundances in the two media, star formation and nucleosynthesis, modelling the chemical enrichment and energetics, numerical simulations of galaxy clusters, cosmic evolution, and other topics. They are not indexed. Annotation c. Book News, Inc., Portland, OR (booknews.com)
Author : Christopher Gareth Few
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Chemodynamical Adaptive Mesh Refinement Simulations of Disk Galaxies written by Christopher Gareth Few and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis I bring together three projects that comprise my postgraduate studies; using numerical simulations of galaxy formation in a cosmological context. The first of these projects involves the simulation of a suite of galaxies in loose group and field environments. This suite of galaxies is used to compare properties such as the metallicity gradients and morphology to determine if systematic differences are apparent as a function of subtle environmental differences. Almost no distinction is seen between galaxies in the field and the loose group environments: individual assembly histories of the galaxies dominate over ambient environmental effects with the exception of the vertical velocity dispersion of the stellar disc where loose group galaxies tend to exhibit a greater number of instances of impulsive heating of the disc. In the second project I present further analysis of this suite of galaxies and a comparison with other galaxies simulated using contrasting methodologies, in ad- dition to several semi-numerical galaxy formation models. The focus of this work is the evolution of metallicity gradients and star formation profiles, finding that galaxies form in an inside-out fashion. This leads to steeper metallicity gradients in young stellar populations at high redshift compared with the present day. By considering present day stellar populations with different ages in these galaxies the converse is found, older populations have flatter gradients. This suggests that while the metallicity gradient starts out steep, it flattens over time due to stellar migra- tion/mixing. This flattening due to stellar migration happens at a faster rate than the flattening of the gas phase metallicity gradient. Finally, I present an update to the N-body and adaptive mesh refinement hydrodynamical code ramses that introduces a more sophisticated feedback treatment, this code is dubbed ramses-ch. Under the new scheme, energetic and elemental feedback is contributed by stars throughout their lifetime rather than (as previously) in a single burst. This relaxation of the 'instantaneous feedback approximation' in ramses-ch opens up the opportunity for studying chemical evolution using adaptive mesh refinement hydrodynamics where previous studies were limited to smoothed particle hydrodynamical codes or semi-numerical models. The new code is applied to the simulation of a typical disc galaxy using different stellar initial mass functions and supernovae type-Ia progenitor models. The influence of these model inputs on the ratio of elemental abundances and supernovae rates in the simulated galaxies are compared as a means of constraining chemical evolution models. The conclu- sions drawn from this work are discussed in the broader context of galaxy formation simulations.
Author : Jacqueline Bergeron
Publisher : Springer Science & Business Media
ISBN 13 : 3540497099
Total Pages : 448 pages
Book Rating : 4.5/5 (44 download)
Download or read book The Early Universe with the VLT written by Jacqueline Bergeron and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second ESO workshop in aseries dedicated to science oppor tunities with the VLT. At the first workshop all areas of astronomical research were discussed. This second workshop is dedicated to research projects on the early Universe and has provided a forum for discussing strategies for studying faint distant objects in the optical and infrared spectral regions. This field is evolving very rapidly. There are several new surveys of galax ies and clusters of galaxies at intermediate redshift and quasars at very high redshift. Major advances in the morphological studies of distant galaxies, surveys of galaxies at high redshift and searches for primeval galaxies have been rendered possible by the new facilities provided by the Rubble Space Telescope and the Keck Telescope. Observational constraints on the evolution and formation of galaxies and large-scale structures as well as the cosmic chemical evolution were criti cally discussed with regard to theory and numerical simulations. In this context, the VLT first generation instrument capabilities were presented comprehensively and their use as cosmological tools discussed . The concluding remarks of the workshop focussed on the analysis of var ious possibilities for the VLT second generation instrumentation. Many of these topics were covered by invited reviews and talks, as well as some contributed talks. They are included in this volume together with the poster papers.
Author : Bernard Ephraim Julius Pagel
Publisher : Cambridge University Press
ISBN 13 : 0521840309
Total Pages : 485 pages
Book Rating : 4.5/5 (218 download)
Download or read book Nucleosynthesis and Chemical Evolution of Galaxies written by Bernard Ephraim Julius Pagel and published by Cambridge University Press. This book was released on 2009-01-15 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lucid introduction for advanced undergraduates and graduate students, and an authoritative overview for researchers and professional scientists.
Author : Jeremy Steven Ritter
Publisher :
ISBN 13 :
Total Pages : 374 pages
Book Rating : 4.:/5 (15 download)
Download or read book Supernova-driven Evolution of the First Stars and Galaxies written by Jeremy Steven Ritter and published by . This book was released on 2018 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy elements like carbon and oxygen are ubiquitous throughout the observed Universe yet only hydrogen, helium, and a few trace light elements are predicted to have been created in the Big Bang. Massive stars fuse light elements to form heavier elements during their brief lifetimes and die as supernova (SN) explosions that enrich the surrounding gas clouds. The chemical evolution history of a galaxy can be traced back through cosmic time from the highly enriched young stars like the Sun to the ancient, extremely metal-poor stars in the outer halo. This dissertation presents a series of high-resolution cosmological numerical simulations designed to explore the initial stages of SN-driven galactic evolution, from the collapse of the very first stars in unenriched dark matter halos to the formation of hot, enriched outflows in a first galaxy. These 3D hydrodynamical simulations of discrete, expanding SN remnants show that they were capable of enriching their host dark matter mini halos and the surrounding gas sufficiently to satisfy the theoretical minimum threshold required to form new low mass metal-enriched stars. Hydrodynamical biases skew our ability to trace the enrichment of individual stars back to a single progenitor SN, however there is hope that we can characterize the enrichment signature of the first stars from the elemental abundance trends observed in the most ancient, metal-poor stars. Primordial gas enriched by a single progenitor SN, assuming Type II-like yields, can have abundance ratios that fall within the parameter-space for the observed populations of extremely metal-poor stars. Finally, galactic outflows are a common feature found in the outer halos of star-forming galaxies. It has long been theorized that the combined effects of many SNe could be responsible for powering the supersonic velocities observed in these outflows. A pilot simulation is performed to explore the effects of a continuous succession of discrete SNe, exploding one at a time in a small starburst galaxy, the results of which will provide insights into the expected thermodynamic and spectroscopic features we might expect when future missions like the James Webb Space Telescope begin to unlock this era in our cosmic history.
Author : Kate Pilkington
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (862 download)
Download or read book Chemodynamical Properties of Simulated Late-type Galaxies written by Kate Pilkington and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
