Download or read book Galaxy Scaling Relations Origins Evolution and Applications written by Luiz N. DaCosta and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: At close inspection every galaxy appears to have its own individuality.A galaxy can be warped, lop-sided, doubly-nucleated, boxy or disky, ... in its own specific, peculiar way. Hence, for a complete description, galaxy taxonomy may ask for finer and finer classification schemes. However, for some applications it may be more fruitful to let details aside and focus on some global properties of galaxies. One is then seeking to measure just a few quantities for each galaxy, a minimum set of globalobservables that yet captures some essential aspect of these objects. One very successful example of this approach is offered by the scaling rela tions of galaxies, the subject of the international workshop held at ESO head quarters in Garching on November 19-21, 1996. Discovered in the late 1970's, the Tully-Fisher relation for the spirals and the Faber-Jackson relation, or its more recent version the Fundamental Plane, for ellipticals have now become flourishing fields of astronomical research in their own right, as well as being widely used tools for a broad range of astronomical investigations. The work shop was designed to address three key issues on galaxy scaling relations, i.e., their Origins, Evolution, and Applications in astronomy. The Origins of galaxy scaling relations still escape our full understanding.
Download or read book Galaxy Scaling Relations written by Luiz Nicolaci Da Costa and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physical Origin of Galaxy Scaling Relations written by Simon D. M. White and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Galaxy Dynamics Formation and Evolution written by Ignacio Ferreras and published by UCL Press. This book was released on 2019-04-02 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The X ray Background written by Xavier Barcons and published by Cambridge University Press. This book was released on 1992-07-31 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the current observational knowledge and understanding of the cosmic X-ray background.
Download or read book Evolution of Galaxy Cluster Scaling Relations Over Half a Hubble Time written by Susan Wilson and published by . This book was released on 2016 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Production and Evolution of Scaling Laws Via Galaxy Merging written by Matthew D. Covington and published by . This book was released on 2008 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scaling Relations and Stellar Populations of Galaxy Clusters from Their First Epochs of Assembly to the Present written by Stefania Amodeo and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on the role of galaxy clusters in cosmology and galaxy evolution. I use multi-wavelenght photometric and spectroscopic observations (optical, mm, near/mid- IR) which I analyse with statistical methods. For a sample of clusters detected by the Planck satellite and re-observed with the Gemini optical telescope, I have studied the dynamics of member galaxies to probe their mass and understand possible systematics affecting such estimates, of crucial importance in cluster cosmology at present. Within the CARLA (Clusters Around Radio Loud AGN) collaboration, I examine morphology and stellar populations of galaxies in clusters and proto-clusters in their first assembly phases (z>1.4), with the aim of shedding light on the quenching of star formation and the role of the environment on galaxy evolution.
Download or read book Scaling Relations and Stellar Populations of Galaxy Clusters from Their First Epochs of Assembly to the Present written by Stefania Amodeo and published by . This book was released on 2018 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on the role of galaxy clusters in cosmology and galaxy evolution. I use multi-wavelenght photometric and spectroscopic observations (optical, mm, near/mid- IR) which I analyse with statistical methods. For a sample of clusters detected by the Planck satellite and re-observed with the Gemini optical telescope, I have studied the dynamics of member galaxies to probe their mass and understand possible systematics affecting such estimates, of crucial importance in cluster cosmology at present. Within the CARLA (Clusters Around Radio Loud AGN) collaboration, I examine morphology and stellar populations of galaxies in clusters and proto-clusters in their first assembly phases (z>1.4), with the aim of shedding light on the quenching of star formation and the role of the environment on galaxy evolution.
Download or read book The Scaling Relations of Elliptical Galaxies written by Carlo Nipoti and published by . This book was released on 2002* with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Galactic Bulges written by Eija Laurikainen and published by Springer. This book was released on 2015-09-29 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Physical Conditions and Scaling Relations of Multi phase Galactic Outflows written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Star formation injects energy and momentum into the interstellar medium, accelerating the gas outward in a galaxy-scale outflow. These outflows eject large amounts of gas out of star-forming regions, helping to control the number of stars formed in a galaxy. In this thesis, I present new observational studies of galactic outflows in the local universe that describe the physical conditions of outflows and how the physical conditions scale with host galaxy properties. I find shallow, yet statistically significant, scaling relations between the outflow velocity and both the star formation rate and the stellar mass of their host galaxies. These scaling relations describe the acceleration of gas out of galaxies, and provide constraints for galaxy evolution models. In particular, I find that low-mass galaxies (stellar mass less than 10^10.5) generate low-ionization outflows faster than their escape velocities, while high-mass galaxies generally do not, unless they are merging with another galaxy. I then explore a variety of ionic transitions that probe the different ionization stages of the outflow. The outflow velocity of each transition depends on the strength of the transition, and I model the outflows as a single co-moving phase. Photo-ionization models determine the ionization structure and metallicities of the outflows. For the local merger NGC 6090, I combine these ionization models with detailed fits to the optical depth and covering fraction of the Si IV absorption lines. These fits determine how the velocity, density, covering fraction and mass outflow rate scales with distance from the starburst. Finally, I study the molecular outflow of M 82 using three different CO emission lines. I model the temperature and density of the molecular gas to estimate the total molecular mass outflow rate, without relying on uncertain conversion factors. I compare the mass outflow rate to the star formation rate and an estimate of the inflow rate to characterize the molecular baryon cycle of M 82. Taken as a whole, this thesis explores the physical properties of nearby galactic outflows, studying how these physical properties scale with host galaxy properties. These results describe the efficiency of star formation, and the cycling of gas out galaxies.
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.
Download or read book An Investigation of Sloan Digital Sky Survey Data and Multi band Scaling Relations of Spiral Galaxies written by Melanie Hall and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have compiled a large sample of 3041 spiral galaxies with multi-band $gri$ photometry from the the Sloan Digital Sky Survey (SDSS) Data Release 7 archive. We compare our own extracted photometry with data products provided through the SDSS pipeline algorithms. This comparison benefits from an extensive compilation of galaxy rotational velocities, $V$, derived from HI linewidths. Galaxy sizes and luminosities can thus be compared against an unbiased and independent metric. We find the SDSS radial ($R$), and luminous, ($L$), data products to be unreliable for the construction of tight scaling relations of $R$ and $L$ with velocity ($V$). We use our own robust scaling parameters to yield the tightest $VRL$ relations possible. We further compile the largest scaling relation of galaxy baryonic mass (stars + gas) with velocity to find that the relation is not tighter, and thus no more significant, than the luminous $VL$ relation.
Download or read book Cosmic Evolution written by Eric J. Chaisson and published by Harvard University Press. This book was released on 2001-02-16 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chaisson addresses some of the most basic issues we can contemplate: the origin of matter and the origin of life, and the ways matter, life, and radiation interact and change with time. He designs for us an expansive yet intricate model depicting the origin and evolution of all material structures.
Download or read book Galaxies in the Local Volume written by Bärbel Silvia Koribalski and published by Springer Science & Business Media. This book was released on 2009-04-29 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely book presents an overview of the galaxies within the Local Volume, including the Local Group and our closest neighbours, the Andromeda Galaxy and the Magellanic Clouds. Presented here are the latest results from radio, infrared and optical surveys as well as detailed multi-wavelength studies of individual galaxies. The book aims to provide a vibrant forum for presentations and discussions across a broad range of astrophysical topics.
Download or read book The Physics and Evolution of Active Galactic Nuclei written by Hagai Netzer and published by Cambridge University Press. This book was released on 2013-09-16 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to the theory underpinning our study of active galactic nuclei and the ways we observe them.
