Spectral Constraints On Models Of Gas In Clusters Of Galaxies
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Spectral Constraints On Models Of Gas In Clusters Of Galaxies
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Author : Mark J. Henriksen
language : en
Publisher:
Release Date : 1985
Spectral Constraints On Models Of Gas In Clusters Of Galaxies written by Mark J. Henriksen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Galaxies categories.
Spectral Constraints On Models Of Gas In Clusters Of Galaxies
DOWNLOAD
Author : Mark J. Henriksen
language : en
Publisher:
Release Date : 1985
Spectral Constraints On Models Of Gas In Clusters Of Galaxies written by Mark J. Henriksen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Galaxies categories.
The Physical Characteristics Of The X Ray Emitting Gas In Clusters Of Galaxies And Constraints On Dark Matter
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Author : Mark Jeffrey Henriksen
language : en
Publisher:
Release Date : 1985
The Physical Characteristics Of The X Ray Emitting Gas In Clusters Of Galaxies And Constraints On Dark Matter written by Mark Jeffrey Henriksen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Galaxies categories.
Observational Constraints On The Assembly Of Galaxies And Galaxy Clusters
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Author : Julia Marie Comerford
language : en
Publisher:
Release Date : 2009
Observational Constraints On The Assembly Of Galaxies And Galaxy Clusters written by Julia Marie Comerford and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Nasa Technical Memorandum
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Author :
language : en
Publisher:
Release Date : 1985
Nasa Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Aeronautics categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
New Constraints On Dark Energy From The Observedgrowth Of The Most X Ray Luminous Galaxy Clusters
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Author :
language : en
Publisher:
Release Date : 2007
New Constraints On Dark Energy From The Observedgrowth Of The Most X Ray Luminous Galaxy Clusters written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
We present constraints on the mean matter density, [Omega]{sub m}, normalization of the density fluctuation power spectrum, [sigma], and dark energy equation of state parameter, w, obtained from the X-ray luminosity function of the Massive Cluster Survey (MACS) in combination with the local BCS and REFLEX galaxy cluster samples. Our analysis incorporates the mass function predictions of Jenkins et al. (2001), a mass-luminosity relation calibrated using the data of Reiprich and Bohringer (2002), and standard priors on the Hubble constant, H0, and mean baryon density, [Omega]{sub b} h2. We find [Omega]{sub m}=0.27 {sup +0.06} {sub -0.05} and [sigma]=0.77 {sup +0.07} {sub -0.06} for a spatially flat, cosmological constant model, and [Omega]{sub m}=0.28 {sup +0.08} {sub -0.06}, [sigma]8=0.75 ± 0.08 and w=-0.97 {sup +0.20} {sub -0.19} for a flat, constant-w model. Our findings constitute the first precise determination of the dark energy equation of state from measurements of the growth of cosmic structure in galaxy clusters. The consistency of our result with w=-1 lends strong additional support to the cosmological constant model. The constraints are insensitive to uncertainties at the 10-20 percent level in the mass function and in the redshift evolution o the mass-luminosity relation; the constraint on dark energy is additionally robust against our choice of priors and known X-ray observational biases affecting the mass-luminosity relation. Our results compare favorably with those from recent analyses of type Ia supernovae, cosmic microwave background anisotropies, the X-ray gas mass fraction of relaxed galaxy clusters and cosmic shear. A simplified combination of the luminosity function data with supernova, cosmic microwave background and cluster gas fraction data using importance sampling yields the improved constraints [Omega]{sub m}=0.263 ± 0.014, [sigma]8=0.79 ± 0.02 and w=-1.00 +- 0.05.
Multiwavelength Cosmology
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Author : Manolis Plionis
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-04-18
Multiwavelength Cosmology written by Manolis Plionis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-18 with Science categories.
The recent scientific efforts in Astrophysics & Cosmology have brought a revolution to our understanding of the Cosmos. Amazing results is the outcome of amazing experiments! The huge scientific, technological & financial effort that has gone into building the 10-m class telescopes as well as many space and balloon observatories, essential to observe the multitude of cosmic phenomena in their manifestations at different wavelengths, from gamma-rays to the millimetre and the radio, has given and is still giving its fruits of knowledge. These recent scientific achievements in Observational and Theoretical Cosmology were presented in the "Multiwavelength Cosmology" conference that took place on beautiful Mykonos island in the Aegean between 17 and 20 June 2003. More than 180 Cosmologists from all over the world gathered for a four-day intense meeting in which recent results from large ground based surveys (AAT/2-df, SLOAN) and space missions (WMAP, Chandra, XMM, ISO, HST) were presented and debated, providing a huge impetus to our knowledge of the Cosmos. The future of the subject (experiments, and directions of research) was also discussed. The conference was devoted mostly on the constraints on Cosmological models and galaxy formation theories that arise from the study of the high redshift Universe, from clusters of galaxies, and their evolution, from the cosmic microwave background, the large-scale structure and star-formation history.
Large Scale Structure Tracks And Traces Proceedings Of 12th Potsdam Cosmology Workshop
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Author : Volker Muller
language : en
Publisher: World Scientific
Release Date : 1998-08-08
Large Scale Structure Tracks And Traces Proceedings Of 12th Potsdam Cosmology Workshop written by Volker Muller and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-08-08 with categories.
Understanding the largest physical structures in the universe is essential for the comprehension of the cosmos as a whole. We want to know how our world is formed, what it is made of and how it evolves.Galaxies, as the most visible constituents of the universe, are interesting probes for the cosmic time sequence. Their formation and development provides us with unique clues to the cosmic evolution. This is tightly connected with the hierarchical cosmic structure: groups and clusters of galaxies and their embedding into the large scale structure offer the opportunity to study the dependencies.Galaxy redshift surveys delineate most impressively a large cosmic web, which is composed of sheets and filaments. Grand simulations of the cosmic evolution complement these observations from the theoretical side and allow one quantify and compare various model universes.Quasar absorption line studies, gravitational lensing and even the X-ray background radiation provide important quantitative measures of the history of matter clustering. Finally, the microwave radiation traces very early structures, which are supposed to originate in the phase of inflationary expansion shortly after the big bang.This volume constituting the proceedings of the 12th Potsdam Cosmology Workshop, deals with the basic aspects of cosmological structure formation on the largest physical scales.
The Interaction Of Gas And Galaxies Within Galaxy Clusters
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Author : Jill Cornell Tarter
language : en
Publisher:
Release Date : 1975
The Interaction Of Gas And Galaxies Within Galaxy Clusters written by Jill Cornell Tarter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Galaxies categories.