Author: Jonathan I. Davies
Publisher: Cambridge University Press
ISBN: 9780521874663
Category : Science
Languages : en
Pages : 0
Book Description
Over the past century astronomers have discovered huge numbers of galaxies within our Universe by detecting the light from the stars they are made of. Now some astronomers believe that there are many other undetected galaxies that do not contain stars. IAU Symposium 244 saw heated debates surrounding the existence of these Dark Galaxies, discussing what a Dark Galaxy is and whether detections satisfy requirements for what one might be. Other contributions describe candidate Dark Galaxies, the baryon content of the Universe, and the discovery of the warm inter-galactic medium and low luminosity galaxies. Highlights include state-of-the-art observations of atomic hydrogen in the Universe that may be used to find Dark Galaxies, how gravitational lensing may be used to map the distribution of matter and inferences of dark structures, and the role of low luminosity galaxies in the formation of larger galaxies.
Dark Galaxies and Lost Baryons (IAU S244)
Author: Jonathan I. Davies
Publisher: Cambridge University Press
ISBN: 9780521874663
Category : Science
Languages : en
Pages : 0
Book Description
Over the past century astronomers have discovered huge numbers of galaxies within our Universe by detecting the light from the stars they are made of. Now some astronomers believe that there are many other undetected galaxies that do not contain stars. IAU Symposium 244 saw heated debates surrounding the existence of these Dark Galaxies, discussing what a Dark Galaxy is and whether detections satisfy requirements for what one might be. Other contributions describe candidate Dark Galaxies, the baryon content of the Universe, and the discovery of the warm inter-galactic medium and low luminosity galaxies. Highlights include state-of-the-art observations of atomic hydrogen in the Universe that may be used to find Dark Galaxies, how gravitational lensing may be used to map the distribution of matter and inferences of dark structures, and the role of low luminosity galaxies in the formation of larger galaxies.
Publisher: Cambridge University Press
ISBN: 9780521874663
Category : Science
Languages : en
Pages : 0
Book Description
Over the past century astronomers have discovered huge numbers of galaxies within our Universe by detecting the light from the stars they are made of. Now some astronomers believe that there are many other undetected galaxies that do not contain stars. IAU Symposium 244 saw heated debates surrounding the existence of these Dark Galaxies, discussing what a Dark Galaxy is and whether detections satisfy requirements for what one might be. Other contributions describe candidate Dark Galaxies, the baryon content of the Universe, and the discovery of the warm inter-galactic medium and low luminosity galaxies. Highlights include state-of-the-art observations of atomic hydrogen in the Universe that may be used to find Dark Galaxies, how gravitational lensing may be used to map the distribution of matter and inferences of dark structures, and the role of low luminosity galaxies in the formation of larger galaxies.
Proceedings of the Twenty Seventh General Assembly Rio de Janeiro 2009
Author: Ian F. Corbett
Publisher: Cambridge University Press
ISBN: 9780521768313
Category : Science
Languages : en
Pages : 548
Book Description
A complete record of the formal organisational and administrative proceedings of the XXVII General Assembly of the International Astronomical Union.
Publisher: Cambridge University Press
ISBN: 9780521768313
Category : Science
Languages : en
Pages : 548
Book Description
A complete record of the formal organisational and administrative proceedings of the XXVII General Assembly of the International Astronomical Union.
Information Bulletin
Author: International Astronomical Union
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 116
Book Description
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 116
Book Description
Baryonic Dark Matter
Author: D. Lynden-Bell
Publisher: Springer Science & Business Media
ISBN: 9400905653
Category : Science
Languages : en
Pages : 301
Book Description
The visible universe is a small perturbation on the material universe. Zwicky and Sinclair Smith in the 1930s gave evidence of invisible mass in the Coma and Virgo Clusters of Galaxies. Better optical data has only served to confound their critics and the X-ray data confirms that the gravitational potentials are many times larger than those predicted on the basis of the observed stars. Dynamical analyses of individual galaxies have found that significant extra mass is needed to explain their rotational velocities. On much larger scales, tens of megaparsecs, there is suggestive evidence that there is even more mass per unit luminosity. What is this non-luminous stuff of which the universe is made'? How much of it is there? Need there be only one kind of stuff? There are three basic possi bili ties:- all of it is ordinary (baryonic) matter, all of it is some other kind of (non-baryonic) matter, or some of it is baryonic and some is non-baryonic.
Publisher: Springer Science & Business Media
ISBN: 9400905653
Category : Science
Languages : en
Pages : 301
Book Description
The visible universe is a small perturbation on the material universe. Zwicky and Sinclair Smith in the 1930s gave evidence of invisible mass in the Coma and Virgo Clusters of Galaxies. Better optical data has only served to confound their critics and the X-ray data confirms that the gravitational potentials are many times larger than those predicted on the basis of the observed stars. Dynamical analyses of individual galaxies have found that significant extra mass is needed to explain their rotational velocities. On much larger scales, tens of megaparsecs, there is suggestive evidence that there is even more mass per unit luminosity. What is this non-luminous stuff of which the universe is made'? How much of it is there? Need there be only one kind of stuff? There are three basic possi bili ties:- all of it is ordinary (baryonic) matter, all of it is some other kind of (non-baryonic) matter, or some of it is baryonic and some is non-baryonic.
Dark Sky, Dark Matter
Author: J.M Overduin
Publisher: CRC Press
ISBN: 1420034510
Category : Science
Languages : en
Pages : 216
Book Description
Olbers' paradox states that given the Universe is unbounded, governed by the standard laws of physics, and populated by light sources, the night sky should be ablaze with light. Obviously this is not so. However, the paradox does not lie in nature but in our understanding of physics. A Universe with a finite age, such as follows from big-bang theor
Publisher: CRC Press
ISBN: 1420034510
Category : Science
Languages : en
Pages : 216
Book Description
Olbers' paradox states that given the Universe is unbounded, governed by the standard laws of physics, and populated by light sources, the night sky should be ablaze with light. Obviously this is not so. However, the paradox does not lie in nature but in our understanding of physics. A Universe with a finite age, such as follows from big-bang theor
Structures in the Universe by Exact Methods
Author: Krzysztof Bolejko
Publisher: Cambridge University Press
ISBN: 0521769140
Category : Science
Languages : en
Pages : 257
Book Description
Reviews developments in applications of inhomogeneous models to cosmology, for graduate students and academic researchers in astrophysics.
Publisher: Cambridge University Press
ISBN: 0521769140
Category : Science
Languages : en
Pages : 257
Book Description
Reviews developments in applications of inhomogeneous models to cosmology, for graduate students and academic researchers in astrophysics.
History of the IAU
Author: Adriaan Blaauw
Publisher: Springer Science & Business Media
ISBN: 9401109788
Category : Science
Languages : en
Pages : 311
Book Description
This History has its origin in a suggestion, made in September 1990 by former IAU General Secretary Derek McNally, who felt "that a 75 year history of the Union was needed before the col lective memory of those who knew the Union before the Second World War vanished. It would then be a preparatory volume to a centennial history in 2019. " Indeed, of those who knew the Union that long ago, few are still with us. Six years ago, at Baltimore on August 2, 1988, listening and reminiscing at the Inaugural Ceremonies of the Union's 20th General Assembly, I realized that it was almost exactly half a century ago that, at the age of 24, I attended the Inaugurations at my "first" Assembly: on August 3, 1938 in Stockholm. Now, in 1994, this is almost 56 years ago, three quarters of the Union's age. Only vague recollections - no better than that -lead me back to this event, just before World War II. And so, this is not a history based on recollection, far from it. Recollection was helpful in that it allowed me, better perhaps than a younger author, to appreciate circumstances under which the letters and reports which form the basis for this History were written. The account is largely based on archival documents, collected from a wide variety of sources.
Publisher: Springer Science & Business Media
ISBN: 9401109788
Category : Science
Languages : en
Pages : 311
Book Description
This History has its origin in a suggestion, made in September 1990 by former IAU General Secretary Derek McNally, who felt "that a 75 year history of the Union was needed before the col lective memory of those who knew the Union before the Second World War vanished. It would then be a preparatory volume to a centennial history in 2019. " Indeed, of those who knew the Union that long ago, few are still with us. Six years ago, at Baltimore on August 2, 1988, listening and reminiscing at the Inaugural Ceremonies of the Union's 20th General Assembly, I realized that it was almost exactly half a century ago that, at the age of 24, I attended the Inaugurations at my "first" Assembly: on August 3, 1938 in Stockholm. Now, in 1994, this is almost 56 years ago, three quarters of the Union's age. Only vague recollections - no better than that -lead me back to this event, just before World War II. And so, this is not a history based on recollection, far from it. Recollection was helpful in that it allowed me, better perhaps than a younger author, to appreciate circumstances under which the letters and reports which form the basis for this History were written. The account is largely based on archival documents, collected from a wide variety of sources.
Relativistic Cosmology
Author: George F. R. Ellis
Publisher: Cambridge University Press
ISBN: 0521381150
Category : Science
Languages : en
Pages : 637
Book Description
Surveying key developments and open issues in cosmology for graduate students and researchers, this book focuses on the general concepts and relations that underpin the standard model of the Universe. It also examines anisotropic and inhomogeneous models, and deeper issues, such as quantum cosmology and the multiverse proposal.
Publisher: Cambridge University Press
ISBN: 0521381150
Category : Science
Languages : en
Pages : 637
Book Description
Surveying key developments and open issues in cosmology for graduate students and researchers, this book focuses on the general concepts and relations that underpin the standard model of the Universe. It also examines anisotropic and inhomogeneous models, and deeper issues, such as quantum cosmology and the multiverse proposal.
The Discourse Reader
Author: Adam Jaworski
Publisher: Psychology Press
ISBN: 9780415346313
Category : Language Arts & Disciplines
Languages : en
Pages : 560
Book Description
The Discourse Reader collects in one volume the most important and influential articles on discourse analysis. Designed as a structured sourcebook and divided into clear sections, the book covers the foundations of modern discourse analysis and represents all of its contemporary methods and traditions. The second edition: has been revised and updated throughout includes six new articles from authors including Teun A. van Dijk, Judith Butler, and Gillian Rose includes 'discussion points' to help readers engage with key issues covers the foundations of modern discourse analysis and represents all of its contemporary methods and traditions. The second edition of The Discourse Reader remains an essential resource for all students of discourse analysis.
Publisher: Psychology Press
ISBN: 9780415346313
Category : Language Arts & Disciplines
Languages : en
Pages : 560
Book Description
The Discourse Reader collects in one volume the most important and influential articles on discourse analysis. Designed as a structured sourcebook and divided into clear sections, the book covers the foundations of modern discourse analysis and represents all of its contemporary methods and traditions. The second edition: has been revised and updated throughout includes six new articles from authors including Teun A. van Dijk, Judith Butler, and Gillian Rose includes 'discussion points' to help readers engage with key issues covers the foundations of modern discourse analysis and represents all of its contemporary methods and traditions. The second edition of The Discourse Reader remains an essential resource for all students of discourse analysis.
Theoretical and Observational Cosmology
Author: Marc Lachièze-Rey
Publisher: Springer Science & Business Media
ISBN: 9780792359456
Category : Science
Languages : en
Pages : 428
Book Description
Proceedings of the NATO Advanced Study Institute, held in Cargèse, France from 17-29 August 1998
Publisher: Springer Science & Business Media
ISBN: 9780792359456
Category : Science
Languages : en
Pages : 428
Book Description
Proceedings of the NATO Advanced Study Institute, held in Cargèse, France from 17-29 August 1998