Download or read book The Evolution of Cluster Elliptical Galaxies microform written by Luis Felipe Barrientos and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Evolution of Cluster Elliptical Galaxies written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evolution of Elliptical Galaxies microform written by Teresa Lynn Kroeker and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Evolution of Cluster Elliptical Galaxies written by Luis Felipe Barrientos and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis work focuses on the understanding of the formation and subsequent evolution of the population of elliptical galaxies in rich galaxy clusters. Elliptical galaxies define a unique and simple laboratory to study the process of galaxy formation and the evolution of stellar populations. Observational data, including a sample of eight clusters observed at Cerro Tololo Inter-American Observatory (CTIO) and ten clusters observed with the Hubble Space Telescope (HST), have been used to conduct several related studies. A surface brightness analysis of the ellipticals in the cores of ten galaxy clusters observed with HST shows that elliptical galaxies are well-represented by an 'r'1/4-law light profile and follow a well-defined relation in the magnitude/size plane, up to 'z' = 1.2. This relation shifts, on average, towards higher luminosities (or equivalently, to smaller sizes) with increasing redshift. If we assume that the size of these galaxies are fixed during the period from 'z' = 1.2 to the present, then these galaxies are evolving monotonically in luminosity. This luminosity evolution amounts to [Delta]'MB' = -1.2 at 'z' = 1.2, when compared to the galaxies in local clusters, and is consistent with that expected for an old and passively evolving stellar population. The luminosity functions for the red galaxies from the eight clusters in the CTIO sample show that are well-represented by a Schechter function, consistent with a single value for their characteristic magnitude (M*). When compared to local cluster luminosity functions, there is evidence for a brightening of a few tenths of a magnitude in M* (the exact value depends on the cosmology). For a low density universe, the brightening observed in the luminosity function, up to 'z' = 0.45, is consistent with that observed from the surface brightness analysis. The cluster elliptical galaxies from the CTIO sample, selected morphologically using a galaxy light profile fitting technique, define a very tight sequence in the colour/magnitude plane. All the clusters are consistent with having a single value for their intrinsic colour dispersions, [delta] = 0.06 ± 0.02, in the restframe ('U' - 'V')/' V' colour relation. These small colour dispersions imply the stars in these galaxies have a typical age dispersion from galaxy to galaxy of ~20% of their age at 'z' = 0.45. Similarly, when comparing the mean colour for the different clusters, it was found that they are consistent with having a single mean colour, ('V' - 'I') = 2.055 ± 0.028. The small dispersion in the mean colours is completely accounted for by sampling uncertainties. With the addition of 'K'-band photometry, and data for local ellipticals, it has been possible to determine the evolutionary vector in the restframe ('U' - 'V')/(' V' - 'H') colour plane from 'z' = 0.45 to 'z' = 0. Predictions of current models have been tested against this observed vector. Most of the more popular models have failed to account for this colour change, and only a more sophisticated model--including infall of primordial gas and chemical enrichment during the assembly of the stellar population--was able to reproduce the observed evolution. The observations in this work strongly suggest that these galaxies are old systems formed at high redshift. However, given the quantitative uncertainties in the observations, population synthesis models, cosmology, and uncertainties in how much synchronicity in formation is reasonable, the observations do not rule out scenarios involving formation at lower redshifts.

Download or read book Galaxy Evolution in Groups and Clusters written by Catarina Lobo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galaxy groups and clusters provide excellent laboratories for studying galaxy properties in different environments and at different look-back times. In particular, the recent detections of high-redshift cluster candidates, only possible with the current high-technology instrumentation, add a new dimension to the problem. Along with the ever increasing computing power and sophisticated algorithms to model clusters of galaxies, it may help us to understand the origins of today's groups and clusters, as well as of their member galaxies. These workshop proceedings provide a snapshot of the current research in this subject, covering the observations, theory and numerical simulations relevant to galaxy evolution in groups and clusters. In this book, intended primarily to researchers in the field, particular emphasis is given to the recent impressive progress in the field, on important new results, and on the future prospects and open questions to be tackled.

Download or read book Globular Cluster Systems in Dwarf Elliptical Galaxies microform written by Patrick Durrell and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1996 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Evolution of Galaxies written by G. Hensler and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galaxies have a history: distant galaxies, formed early in the life of the universe, differ from the nearby ones. This book addresses the modeling of galaxy evolution from their cosmological formation to their presently observable structures, presenting the state of the art in the field.

Download or read book Extragalactic Globular Cluster Systems written by Markus Kissler-Patig and published by Springer Science & Business Media. This book was released on 2003-07-21 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dramatic progress is a trademark of the recent study of globular cluster systems. Considerations about the formation and evolution compose the first chapter, followed by a chapter on young star clusters. Then come four chapters reviewing the globular cluster system of early-type, late-type and dwarf galaxies, as well as of groups of galaxies. One chapter is dedicated to stellar population models and their applications to the field. Finally a chapter reviews the kinematics of galaxies derived from globular cluster systems and another their role in the context of galaxy formation and evolution studies. As a whole, the book gives an up-to-date view of the field at the beginning of the new decade, which will without doubt again bring significant progress in our understanding of globular cluster systems and galaxy formation and evolution.

Download or read book The Evolution of Galaxies written by José M. Vilchez and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galaxies have a history. This has become clear from recent sky surveys showing that distant galaxies, formed early in the life of the Universe, differ from the nearby ones. This book contains the proceedings of a 2000 conference addressing observational clues in this area.

Download or read book On the Evolution of the Clustering of Galaxies microform written by Charles William Shepherd and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2002 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Formation and Evolution of Elliptical Galaxies written by Richard Joseph Norman Brown and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deep CCD Photometry of the Rich Galaxy Cluster Abel 1656 Characteristics of the Dwarf Elliptical Galaxy Population in the Cluster Core microform written by Jeff Secker and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1995 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hierarchical pairs and the evolution of elliptical galaxies written by Philippe Prugniel and published by . This book was released on 1989 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Evolution of Elliptical Galaxies and a Test of World Models written by Neal Richard Todd and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book X ray Evolution of Model Elliptical Galaxies written by Annibale D'Ercole and published by . This book was released on 1989 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Second Stromlo Symposium written by Magda Arnaboldi and published by . This book was released on 1997 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Merging Processes in Galaxy Clusters written by L. Feretti and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mergers are the mechanisms by which galaxy clusters are assembled through the hierarchical growth of smaller clusters and groups. Major cluster mergers are the most energetic events in the Universe since the Big Bang. Many of the observed properties of clusters depend on the physics of the merging process. These include substructure, shock, intra cluster plasma temperature and entropy structure, mixing of heavy elements within the intra cluster medium, acceleration of high-energy particles, formation of radio halos and the effects on the galaxy radio emission. This book reviews our current understanding of cluster merging from an observational and theoretical perspective, and is appropriate for both graduate students and researchers in the field.