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Multi-wavelength applications of gravitational lensing
Descriptive
TypeOfResource
Text
TitleInfo
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Title
Multi-wavelength applications of gravitational lensing
Identifier
ETD_2891
Identifier
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http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056320
Language
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eng
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theses
Subject
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(authority = RUETD)
Topic
Physics and Astronomy
Subject
(ID = SBJ-2);
(authority = ETD-LCSH)
Topic
Gravitational lenses
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Cosmology
Subject
(ID = SBJ-4);
(authority = ETD-LCSH)
Topic
Dark matter (Astronomy)
Subject
(ID = SBJ-5);
(authority = ETD-LCSH)
Topic
Hubble Deep Field
Abstract
(type = abstract)
Using an array of multi-wavelength data, we examine a variety of astrophysical problems with gravitational lensing. First, we seek to understand the mass distribution of an early-type galaxy with an analysis of the lens Q0957+561. We dissect the lens galaxy into luminous and dark components, and model the environment using results from weak lensing. Combining constraints from newly-discovered lensed images and stellar population models we find the lens has a density profile which is shallower than isothermal, unlike those of typical early-type galaxies. Finally, using the measured time delay between the quasar images we find the Hubble constant to be H_0=79.3^{+6.7}_{-8.5} km s^{-1} Mpc^{-1}. One intriguing application of lensing is to exploit the lens magnification boost to study high-redshift objects in greater detail than otherwise possible. Here, we analyze the mid-infrared properties of two lensed z~2 star-forming galaxies, SDSS J120602.09+514229.5 and SDSS J090122.37+181432.3, using Spitzer/IRS spectra to study their rest-frame ~ 5-12 micron emission. Both systems exhibit strong polycyclic aromatic hydrocarbon (PAH) features in the spectra, indicating strong star formation and the absence of significant AGN activity. For SDSS J090122.37+181432.3, this detection belies that inferred from optical measurements, indicating mid-IR spectroscopy provides key information needed to understand the properties of high-redshift star-forming galaxies. While lensing provides measurements of the macroscopic properties of lens systems, it can also shed light on small-scale structure of galaxies. To identify and understand lens substructure, we examine the multi-wavelength properties of flux ratios for six lenses. Variations of the flux ratios with wavelength can be used to study the lensed quasars and the small-scale mass distribution of lens galaxies. We detect strong multi-wavelength variations in the lenses HE 0435-1223 and SDSS 0806+2006. For HE 0435-1223, we study its substructure with a series of lens models which add clumps of mass near the lensed images. We detect the presence of a clump near image A, with a mass of log(M_A(<Rein))=7.68^{+0.92}_{-0.85}. We also find support for a second clump, near image B, with mass log(M_B(<Rein))=6.6^{+1.02}_{-1.52}, although evidence for this clump is not decisive. Using Monte Carlo simulations, we connect these clumps to their associated populations, finding the mass fraction in substructure to be > 0.00092.
PhysicalDescription
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electronic resource
Extent
xii, 198 p. : ill.
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Note
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Ph.D.
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Includes bibliographical references
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Includes vita
Note
(type = statement of responsibility)
by Ross Fadely
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Fadely
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Ross
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Ross Fadely
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Keeton
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Charles R
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chair
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Charles R Keeton
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Baker
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Andrew J
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Advisory Committee
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Andrew J Baker
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Joseph
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Charles
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Advisory Committee
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Charles Joseph
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Ransome
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Ronald
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Ronald Ransome
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Bernstein
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Gary M
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outside member
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Advisory Committee
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Gary M Bernstein
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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school
OriginInfo
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2010
DateOther
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2010-10
Place
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xx
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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NjNbRU
Identifier
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doi:10.7282/T35X28QF
Genre
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ETD doctoral
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Rights
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The author owns the copyright to this work.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Name
FamilyName
Fadely
GivenName
Ross
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DateTime
2010-09-22 16:26:30
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Ross Fadely
Affiliation
Rutgers University. Graduate School - New Brunswick
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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.
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