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THE CATALOG OF GALAXY CLUSTERS OBTAINED BY AN ADAPTIVE
MATCHED FILTER METHOD APPLIED TO THE SLOAN DIGITAL SKY
SURVEY DATA RELEASE SIX
by
Thad P. Szabo
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(PHYSICS)
August 2010
Copyright 2010 Thad P. Szabo
Object Description
| Title | The catalog of galaxy clusters obtained by an adaptive matched filter method applied to the Sloan Digital Sky Survey Data Release Six |
| Author | Szabo, Thad P. |
| Author email | tszabo@usc.edu; thad.szabo@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Physics |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2010-04-30 |
| Date submitted | 2010 |
| Restricted until | Restricted until 07 Jun. 2011. |
| Date published | 2011-06-07 |
| Advisor (committee chair) | Pierpaoli, Elena |
| Advisor (committee member) |
Dappen, Werner Warner, Nicholas P. Chang, Tu-nan Anderson, J. Lawford |
| Abstract | We present a catalog of galaxy clusters detected by running an adaptive matched filter finder on Sloan Digital Sky Survey Data Release 6. We present the position, redshift, richness, radius and core radius of these optically determined clusters, as well as error estimates on these values. The advantages of using a finder that does not make assumptions about the colors of the constituent galaxies in a cluster are demonstrated through comparisons with other cluster catalogs derived from SDSS data. We also compare our clusters with known X–ray clusters in overlapping regions of the sky, and we find reasonable correlations between our optical observables and X–ray observables.; From our catalog and available SDSS data, we also present a list of brightest cluster galaxy (BCG) candidates for each cluster in the form of the three brightest galaxies in the r-band. Properties of these BCGs are compared with expected values from simulations and earlier observations. Our findings are in good agreement with the current understanding of these galaxies. We also examine BCGs for evidence of star formation. The types of galaxies that serve as BCGs are giant ellipticals, and are generally thought to be “red and dead.” Cooling flows in clusters can deposit gas into a BCG. We find evidence for star formation in about 20% of our BCGs.; Our catalog can also serve as a basis for choosing future targets for X–ray, ultraviolet, and Sunyaev-Zel’dovich studies. We provide the most extensive list to-date of optical clusters for potential research in other bands. |
| Keyword | galaxy clusters; cosmology; galaxies; adaptive matched filter; Sloan Digital Sky Survey; visible light; optical; likelihood optimization |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m3117 |
| Contributing entity | University of Southern California |
| Rights | Szabo, Thad P. |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@dots.usc.edu |
| Filename | etd-Szabo-3736 |
| Archival file | uscthesesreloadpub_Volume23/etd-Szabo-3736.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@dots.usc.edu |
| Full text | THE CATALOG OF GALAXY CLUSTERS OBTAINED BY AN ADAPTIVE MATCHED FILTER METHOD APPLIED TO THE SLOAN DIGITAL SKY SURVEY DATA RELEASE SIX by Thad P. Szabo A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (PHYSICS) August 2010 Copyright 2010 Thad P. Szabo |
