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The Formation of Galactic Bulges

The Formation of Galactic Bulges
Author: C. Marcella Carollo
Publisher: Cambridge University Press
Total Pages: 248
Release: 1999
Genre: Science
ISBN: 9780521663342
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Bulges lie at the center of spiral galaxies. Until recently, they were thought to host uniquely old stellar populations and thus provide a key for understanding galaxy formation. Recent observations from the ground and space have drastically changed our view on the nature of bulges and shown that they can also contain dust, gas, and star-forming regions. This timely volume presents review articles by a panel of international experts who gathered at a conference at the Space Telescope Science Institute, Baltimore, to address several fundamental questions: What is a bulge? When and how did bulges form? And, on what timescales? This volume provides a state-of-the-art picture of our new understanding of these fundamental building-blocks of galaxies, and a stimulating reference point for all those interested in galaxy formation.

Galactic Bulges

Galactic Bulges
Author: Eija Laurikainen
Publisher: Springer
Total Pages: 480
Release: 2015-09-29
Genre: Science
ISBN: 3319193783
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This book consists of invited reviews on Galactic Bulges written by experts in the field. A central point of the book is that, while in the standard picture of galaxy formation a significant amount of the baryonic mass is expected to reside in classical bulges, the question what is the fraction of galaxies with no classical bulges in the local Universe has remained open. The most spectacular example of a galaxy with no significant classical bulge is the Milky Way. The reviews of this book attempt to clarify the role of the various types of bulges during the mass build-up of galaxies, based on morphology, kinematics and stellar populations and connecting their properties at low and high redshifts. The observed properties are compared with the predictions of the theoretical models, accounting for the many physical processes leading to the central mass concentration and their destruction in galaxies. This book serves as an entry point for PhD students and non-specialists and as a reference work for researchers in the field.

Formation and Evolution of Galaxy Bulges (IAU S245)

Formation and Evolution of Galaxy Bulges (IAU S245)
Author: International Astronomical Union. Symposium
Publisher: Cambridge University Press
Total Pages: 510
Release: 2008-09-04
Genre: Science
ISBN: 9780521874670
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Bulges lie at the heart of most galaxies, the building blocks of our universe. With a selection of reviews and topical presentations, IAU Symposium 245 provides an up-to-date overview of our knowledge on galaxy bulges, and a concise introduction to all current research on the subject. The structure, dynamics, and stellar populations of galaxy bulges, both near and far, are analysed through state-of-the-art observations. The leading models for the formation and evolution of galaxy bulges are described in detail, and the constraints observations put on these are dissected. Particular emphasis is placed on exploring evidence for both hierarchical merging and secular processes. Special attention is also devoted to disentangling the complex web relating galaxy bulges and central supermassive black holes, and on the lessons learned from our exquisite knowledge of the bulge of our own Milky Way. This volume is the best one-stop reference on galaxy bulges currently available.

The Formation of the Galactic Bulge of the Milky Way

The Formation of the Galactic Bulge of the Milky Way
Author: Melissa Kay Ness
Publisher:
Total Pages: 424
Release: 2013
Genre: Galactic bulges
ISBN:
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Infrared imaging with the COBE satellite shows that the Milky Way has a small boxy / peanut-shaped bulge. Disk galaxies with small bulges pose a problem for the ACDM model of galaxy formation, which predicts large central bulges formed in galaxies via merger activity. Dynamical N-body simulations of stellar disks show that small boxy / peanut bulges can form via dynamical instabilities from the buckling of an inner bar which evolves from the disk at early times. These bulges have cylindrical rotation and they contain potentially identifiable chemical signatures of the early disk trapped within the bulge.

Planets, Stars and Stellar Systems

Planets, Stars and Stellar Systems
Author: Gerard Gilmore
Publisher: Springer
Total Pages: 0
Release: 2013-02-23
Genre: Science
ISBN: 9789400756113
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This is volume 5 of Planets, Stars and Stellar Systems, a six-volume compendium of modern astronomical research, covering subjects of key interest to the main fields of contemporary astronomy. This volume on “Galactic Structure and Stellar Populations”, edited by Gerard F. Gilmore, presents accessible review chapters on Stellar Populations, Chemical Abundances as Population Tracers, Metal-Poor Stars and the Chemical Enrichment of the Universe, The Stellar and Sub-Stellar Initial Mass Function of Simple and Composite Populations, The Galactic Nucleus, The Galactic Bulge, Open Clusters and Their Role in the Galaxy, Star Counts and the Nature of Galactic Thick Disk, The Infrared Galaxy, Interstellar PAHs and Dust, Galactic Neutral Hydrogen, High-Velocity Clouds, Magnetic Fields in Galaxies, Astrophysics of Galactic Charged Cosmic Rays, Gamma-Ray Emission of Supernova Remnants and the Origin of Galactic Cosmic Rays, Galactic Distance Scales, Globular Cluster Dynamical Evolution, Dynamics of Disks and Warps, Mass Distribution and Rotation Curve in the Galaxy, Dark Matter in the Galactic Dwarf Spheroidal Satellites, and History of Dark Matter in Galaxies. All chapters of the handbook were written by practicing professionals. They include sufficient background material and references to the current literature to allow readers to learn enough about a specialty within astronomy, astrophysics and cosmology to get started on their own practical research projects. In the spirit of the series Stars and Stellar Systems published by Chicago University Press in the 1960s and 1970s, each chapter of Planets, Stars and Stellar Systems can stand on its own as a fundamental review of its respective sub-discipline, and each volume can be used as a textbook or recommended reference work for advanced undergraduate or postgraduate courses. Advanced students and professional astronomers in their roles as both lecturers and researchers will welcome Planets, Stars and Stellar Systems as a comprehensive and pedagogical reference work on astronomy, astrophysics and cosmology.

The Center, Bulge, and Disk of the Milky Way

The Center, Bulge, and Disk of the Milky Way
Author: Leo Blitz
Publisher: Springer Science & Business Media
Total Pages: 175
Release: 2012-12-06
Genre: Science
ISBN: 9401128138
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Our view of our Galaxy has recently been undergoing an increasing divergence from the traditional standpoint. In this book ten authors discuss in eight chapters how the conceptions of the Milky Way have moved in new directions. Starting with the inner parsec and the Center of the Galaxy, the book gradually moves on to the bulge and its relation to the globular clusters and to the disk, of which the presence of a bar is argued. A new look on the HI distribution in the disk, a synthesis of molecular line surveys and the study of stellar populations are discussed in the last three chapters.

Formation and Evolution of Galactic Bulges

Formation and Evolution of Galactic Bulges
Author: Raúl Cacho Martínez
Publisher:
Total Pages:
Release: 2015
Genre:
ISBN:
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The main goal of this work is to understand the formation and evolution of galactic bulges. We face this problem from different points of view, achieving partial objectives: The comparative analysis between two samples of barred and unbarred galaxies from the Sloan Digital Sky Survey (SDSS) will allow us to understand the differences (if exist) about how barred and unbarred galaxies form their bulges. Bulges in galaxies are formed by different stellar components, each one with different properties (age, metallicity and kinematics). These properties are determined by the physical processes which gave place to their formation, which we want to understand. For a better comprehension of these subcomponents, we will try to di- sentangle the stellar populations in bulges from their integrated spec- trum. To do this we have to develop a new technique which will allow us to derive the kinematics, age and metallicity of each individual com- ponents contributing to the bulge...

The Road to Galaxy Formation

The Road to Galaxy Formation
Author: William C. Keel
Publisher: Springer Science & Business Media
Total Pages: 266
Release: 2002-09-20
Genre: Science
ISBN: 9781852335748
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Written by one of the leading authorities in the field, this is one of the first book's to describe one of today's most important problems in cosmology - the formation of galaxies. The book tackles this great puzzle by discusses the beginnings of the process from cosmological observations and calculations, considers the broad features of galaxies that we need to explain and what we know of their later history. The author compares the competing theories for galaxy formation and considers the progress expected from new generations of powerful telescopes both on earth and in space. An intriguing text on one of today's greatest and most profound puzzles.

Fundamentals of Galaxy Dynamics, Formation and Evolution

Fundamentals of Galaxy Dynamics, Formation and Evolution
Author: Ignacio Ferreras
Publisher: UCL Press
Total Pages: 200
Release: 2019-04-02
Genre: Science
ISBN: 1911307614
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Galaxies, along with their underlying dark matter halos, constitute the building blocks of structure in the Universe. Of all fundamental forces, gravity is the dominant one that drives the evolution of structures from small density seeds at early times to the galaxies we see today. The interactions among myriads of stars, or dark matter particles, in a gravitating structure produce a system with fascinating connotations to thermodynamics, with some analogies and some fundamental differences. Ignacio Ferreras presents a concise introduction to extragalactic astrophysics, with emphasis on stellar dynamics, and the growth of density fluctuations in an expanding Universe. Additional chapters are devoted to smaller systems (stellar clusters) and larger ones (galaxy clusters). Fundamentals of Galaxy Dynamics, Formation and Evolution is written for advanced undergraduates and beginning postgraduate students, providing a useful tool to get up to speed in a starting research career. Some of the derivations for the most important results are presented in detail to enable students appreciate the beauty of maths as a tool to understand the workings of galaxies. Each chapter includes a set of problems to help the student advance with the material.