Staff View
Measuring the growth of structure with multi-wavelength surveys of galaxy clusters

Descriptive

TitleInfo (displayLabel = Citation Title); (type = uniform)
Title
Measuring the growth of structure with multi-wavelength surveys of galaxy clusters
Name (ID = NAME001); (type = personal)
NamePart (type = family)
Sehgal
NamePart (type = given)
Neelima
DisplayForm
Neelima Sehgal
Role
RoleTerm (authority = RULIB)
author
Name (ID = NAME002); (type = personal)
NamePart (type = family)
Hughes
NamePart (type = given)
John
Affiliation
Advisory Committee
DisplayForm
John P Hughes
Role
RoleTerm (authority = RULIB)
chair
Name (ID = NAME003); (type = personal)
NamePart (type = family)
Williams
NamePart (type = given)
Theodore
Affiliation
Advisory Committee
DisplayForm
Theodore B Williams
Role
RoleTerm (authority = RULIB)
internal member
Name (ID = NAME004); (type = personal)
NamePart (type = family)
Haule
NamePart (type = given)
Kristjan
Affiliation
Advisory Committee
DisplayForm
Kristjan Haule
Role
RoleTerm (authority = RULIB)
internal member
Name (ID = NAME005); (type = personal)
NamePart (type = family)
Kosowsky
NamePart (type = given)
Arthur
Affiliation
Advisory Committee
DisplayForm
Arthur Kosowsky
Role
RoleTerm (authority = RULIB)
internal member
Name (ID = NAME006); (type = personal)
NamePart (type = family)
Haiman
NamePart (type = given)
Zoltan
Affiliation
Advisory Committee
DisplayForm
Zoltan Haiman
Role
RoleTerm (authority = RULIB)
outside member
Name (ID = NAME007); (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (ID = NAME008); (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2008
DateOther (qualifier = exact); (type = degree)
2008-05
Language
LanguageTerm
English
PhysicalDescription
Form (authority = marcform)
electronic
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xii, 96 pages
Abstract
Current and near-future galaxy cluster surveys at a variety of wavelengths are expected to provide a promising way to obtain precision measurements of the growth of structure over cosmic time. This in turn would serve as an important precision probe of cosmology. However, to realize the full potential of these surveys, systematic uncertainties arising from, for example, cluster mass estimates and sample selection must be well understood. This work follows several different approaches towards alleviating these uncertainties.
Cluster sample selection is investigated in the context of arcminute-resolution millimeter-wavelength surveys such as the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT). Large-area, realistic simulations of the microwave sky are constructed and cluster detection is simulated using a multi-frequency Wiener filter to separate the galaxy clusters, via their Sunyaev-Zel'dovich signal, from other contaminating microwave signals. Using this technique, an ACT-like survey can expect to obtain a cluster sample that is 90% complete and 85% pure above a mass of 3 x 10^14 Msun.
Cluster mass uncertainties are explored by comparing X-ray and weak-lensing mass estimates for shear-selected galaxy clusters in the Deep Lens Survey (DLS) to study possible biases in using cluster baryons or weak-lensing shear as tracers of the cluster total mass. Results are presented for four galaxy clusters that comprise the top-ranked shear-selected system in the DLS, and for three of these clusters there is agreement between X-ray and weak-lensing mass estimates. For the fourth cluster, the X-ray mass estimate is higher than that from weak-lensing by 2-sigma, and X-ray images suggest this cluster may be undergoing a merger with a smaller cluster, which may be biasing the X-ray mass estimate high.
The feasibility of measuring galaxy cluster peculiar velocities using an ACT-like instrument is also investigated. Such a possibility would allow one to measure structure growth via large-scale velocity fields and circumvent the uncertainties associated with measuring cluster masses. We show that such measurements are possible and yield statistical uncertainties of roughly 100 km/sec given either a temperature prior with 1-sigma errors of less than 2 keV or additional lower frequency millimeter-band observations.
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references.
Subject (ID = SUBJ1); (authority = RUETD)
Topic
Physics and Astronomy
Subject (ID = SUBJ2); (authority = ETD-LCSH)
Topic
Galaxies--Clusters
Subject (ID = SUBJ3); (authority = ETD-LCSH)
Topic
Cosmology--Observations
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17389
Identifier
ETD_874
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3902443
Back to the top

Rights

RightsDeclaration (AUTHORITY = GS); (ID = rulibRdec0006)
The author owns the copyright to this work.
Copyright
Status
Copyright protected
Availability
Status
Open
AssociatedEntity (AUTHORITY = rulib); (ID = 1)
Name
Neelima Sehgal
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
RightsEvent (AUTHORITY = rulib); (ID = 1)
Type
Permission or license
Detail
Non-exclusive ETD license
AssociatedObject (AUTHORITY = rulib); (ID = 1)
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Back to the top

Technical

Format (TYPE = mime); (VERSION = )
application/x-tar
FileSize (UNIT = bytes)
1131008
Checksum (METHOD = SHA1)
97a7c53c33d798b757320faaa0bbac205703b4b5
ContentModel
ETD
CompressionScheme
other
OperatingSystem (VERSION = 5.1)
windows xp
Format (TYPE = mime); (VERSION = NULL)
application/x-tar
Back to the top
Version 8.3.5
Rutgers University Libraries - Copyright ©2018