Author: Omar Lopez-Cruz
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Photometric Properties of Low-redshift Galaxy Clusters
Photometric Properties of Low-redshift Galaxy Clusters
Photometric Redshifts and Physical Properties of Low Redshift Galaxies
The Distribution of Star-forming Galaxies in Intermediate Redshift Galaxy Clusters
Author: Steven Michael Crawford
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
Book Description
The Influence of Environment on High-redshift Cluster Galaxies
Author: Anna Delahaye
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"Galaxy properties such as colour, star-formation rate, and morphology are influenced by the environments in which they reside. In particular, the environments of galaxy clusters have been shown be very efficient at quenching star-formation and altering other observed galactic properties, although the specific mechanisms responsible for this evolution are not fully understood. Additionally, the effect that the cluster environment has on galaxies does not appear to be consistent at all redshifts, with high-redshift cluster galaxies having different observed properties compared to their local counterparts. In this thesis, two studies are presented that investigate the role of high-redshift galaxy cluster environments on their galactic populations.The first study is an extensive photometric survey of the supercluster RCS2319+00, a massive supercluster system comprising three virialized cluster cores in close proximity with one another in projected space as well as redshift space. The system is located at a redshift of z = 0.9 and is expected to merge into a single 10^15 solar mass cluster by z = 0.5, and is therefore a progenitor of the most massive cluster systems we see in the nearby universe today. Spectroscopic and submillimetre surveys have previously uncovered a complicated system of filamentary structure and infalling groups. To complement the previous studies, we assemble a large multiwavelength catalogue to identify cluster members based on photometric properties.With a photometric catalogue complete with photometric redshifts for over 16,000 objects across the central RCS2319 field, we compile a cluster catalogue of nearly 1,800 cluster members. Using proxies for both local and global environments, we investigate the mass and colour properties of cluster galaxies depending on their specific environments within the supercluster. While we do not find a strong dependence on global environment, we do recover both a mass-density and colour-density relation depending on the local overdensity suggesting that immediate surroundings influence galactic properties more strongly than the overall structure in which it resides.The second study presented investigates the presence of merging systems in high-redshift cluster environments compared to the field. We use a sample of four galaxy clusters (1.59
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"Galaxy properties such as colour, star-formation rate, and morphology are influenced by the environments in which they reside. In particular, the environments of galaxy clusters have been shown be very efficient at quenching star-formation and altering other observed galactic properties, although the specific mechanisms responsible for this evolution are not fully understood. Additionally, the effect that the cluster environment has on galaxies does not appear to be consistent at all redshifts, with high-redshift cluster galaxies having different observed properties compared to their local counterparts. In this thesis, two studies are presented that investigate the role of high-redshift galaxy cluster environments on their galactic populations.The first study is an extensive photometric survey of the supercluster RCS2319+00, a massive supercluster system comprising three virialized cluster cores in close proximity with one another in projected space as well as redshift space. The system is located at a redshift of z = 0.9 and is expected to merge into a single 10^15 solar mass cluster by z = 0.5, and is therefore a progenitor of the most massive cluster systems we see in the nearby universe today. Spectroscopic and submillimetre surveys have previously uncovered a complicated system of filamentary structure and infalling groups. To complement the previous studies, we assemble a large multiwavelength catalogue to identify cluster members based on photometric properties.With a photometric catalogue complete with photometric redshifts for over 16,000 objects across the central RCS2319 field, we compile a cluster catalogue of nearly 1,800 cluster members. Using proxies for both local and global environments, we investigate the mass and colour properties of cluster galaxies depending on their specific environments within the supercluster. While we do not find a strong dependence on global environment, we do recover both a mass-density and colour-density relation depending on the local overdensity suggesting that immediate surroundings influence galactic properties more strongly than the overall structure in which it resides.The second study presented investigates the presence of merging systems in high-redshift cluster environments compared to the field. We use a sample of four galaxy clusters (1.59
The Photometric Properties of Brightest Cluster Galaxies
Author: John Greg Hoessel
Publisher:
ISBN:
Category : Astronomical photometry
Languages : en
Pages : 124
Book Description
Publisher:
ISBN:
Category : Astronomical photometry
Languages : en
Pages : 124
Book Description
Star-Formation Rates of Galaxies
Author: Andreas Zezas
Publisher: Cambridge University Press
ISBN: 1316877523
Category : Science
Languages : en
Pages : 318
Book Description
Star-formation is one of the key processes that shape the current state and evolution of galaxies. This volume provides a comprehensive presentation of the different methods used to measure the intensity of recent or on-going star-forming activity in galaxies, discussing their advantages and complications in detail. It includes a thorough overview of the theoretical underpinnings of star-formation rate indicators, including topics such as stellar evolution and stellar spectra, the stellar initial mass function, and the physical conditions in the interstellar medium. The authors bring together in one place detailed and comparative discussions of traditional and new star-formation rate indicators, star-formation rate measurements in different spatial scales, and comparisons of star-formation rate indicators probing different stellar populations, along with the corresponding theoretical background. This is a useful reference for students and researchers working in the field of extragalactic astrophysics and studying star-formation in local and higher-redshift galaxies.
Publisher: Cambridge University Press
ISBN: 1316877523
Category : Science
Languages : en
Pages : 318
Book Description
Star-formation is one of the key processes that shape the current state and evolution of galaxies. This volume provides a comprehensive presentation of the different methods used to measure the intensity of recent or on-going star-forming activity in galaxies, discussing their advantages and complications in detail. It includes a thorough overview of the theoretical underpinnings of star-formation rate indicators, including topics such as stellar evolution and stellar spectra, the stellar initial mass function, and the physical conditions in the interstellar medium. The authors bring together in one place detailed and comparative discussions of traditional and new star-formation rate indicators, star-formation rate measurements in different spatial scales, and comparisons of star-formation rate indicators probing different stellar populations, along with the corresponding theoretical background. This is a useful reference for students and researchers working in the field of extragalactic astrophysics and studying star-formation in local and higher-redshift galaxies.
A Pan-Chromatic View of Clusters of Galaxies and the Large-Scale Structure
Author: Manolis Plionis
Publisher: Springer Science & Business Media
ISBN: 1402069405
Category : Science
Languages : en
Pages : 476
Book Description
The reviews presented in this volume cover a huge range of cluster of galaxies topics. Readers will find the book essential reading on subjects such as the physics of the ICM gas, the internal cluster dynamics, and the detection of clusters using different observational techniques. The expert chapter authors also cover the huge advances being made in analytical or numerical modeling of clusters, weak and strong lensing effects, and the large scale structure as traced by clusters.
Publisher: Springer Science & Business Media
ISBN: 1402069405
Category : Science
Languages : en
Pages : 476
Book Description
The reviews presented in this volume cover a huge range of cluster of galaxies topics. Readers will find the book essential reading on subjects such as the physics of the ICM gas, the internal cluster dynamics, and the detection of clusters using different observational techniques. The expert chapter authors also cover the huge advances being made in analytical or numerical modeling of clusters, weak and strong lensing effects, and the large scale structure as traced by clusters.
Galaxy Interactions at Low and High Redshift
Author: J.E. Barnes
Publisher: Springer Science & Business Media
ISBN: 9401146659
Category : Science
Languages : en
Pages : 530
Book Description
These proceedings offer professional astronomers an overview of the rapidly advancing subject of galaxy interactions at low and high redshifts. The symposium gave participants an exciting glimpse of a developing synthesis highlighting galactic encounters and their role in the history of the Universe.
Publisher: Springer Science & Business Media
ISBN: 9401146659
Category : Science
Languages : en
Pages : 530
Book Description
These proceedings offer professional astronomers an overview of the rapidly advancing subject of galaxy interactions at low and high redshifts. The symposium gave participants an exciting glimpse of a developing synthesis highlighting galactic encounters and their role in the history of the Universe.
Photometric Redshifts and High Redshift Galaxies
Author: Ray J. Weymann
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 410
Book Description
The 52 papers respond to the explosion of the search for and discovery of high redshift galaxies and the application of broad-band photometry to obtain remarkably reliable estimates of the redshifts of galaxies at all redshifts, spurred not only by the Hubble Deep Fields, but also by the advent of wide-field CCDs on ground-based telescopes and the development of sensitive infrared, submillimeter, and millimeter instrumentation. They discuss techniques, findings, and integrating new data into existing models of galaxy formation and evolution.
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 410
Book Description
The 52 papers respond to the explosion of the search for and discovery of high redshift galaxies and the application of broad-band photometry to obtain remarkably reliable estimates of the redshifts of galaxies at all redshifts, spurred not only by the Hubble Deep Fields, but also by the advent of wide-field CCDs on ground-based telescopes and the development of sensitive infrared, submillimeter, and millimeter instrumentation. They discuss techniques, findings, and integrating new data into existing models of galaxy formation and evolution.