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Environments of strong gravitational...

The University of Arizona., Astronomy.

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Environments of strong gravitational lenses.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Environments of strong gravitational lenses./
Author:	Momcheva, Ivelina Gospodinova.
Description:	317 p.
Notes:	Adviser: Ann Zabludoff.
Contained By:	Dissertation Abstracts International70-03B.
Subject:	Physics, Astronomy and Astrophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3350066
ISBN:	9781109069143

Environments of strong gravitational lenses.
Momcheva, Ivelina Gospodinova.

Environments of strong gravitational lenses. - 317 p.

Adviser: Ann Zabludoff.

Thesis (Ph.D.)--The University of Arizona, 2009.

This dissertation focuses on determining the properties of the environments and the line-of-sight mass distributions for a sample of strong gravitational lenses as well as establishing their effects on the observed lens properties and the Hubble constant.

ISBN: 9781109069143Subjects--Topical Terms:

1019521
Physics, Astronomy and Astrophysics.

Environments of strong gravitational lenses.
LDR:03307nam 2200325 a 45 001 855736
005 20100708
008 100708s2009 ||||||||||||||||| ||eng d
020 $a 9781109069143
035 $a (UMI)AAI3350066
035 $a AAI3350066
040 $a UMI $c UMI
100 1 $a Momcheva, Ivelina Gospodinova. $3 1022405
245 1 0 $a Environments of strong gravitational lenses.
300 $a 317 p.
500 $a Adviser: Ann Zabludoff.
500 $a Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1712.
502 $a Thesis (Ph.D.)--The University of Arizona, 2009.
520 $a This dissertation focuses on determining the properties of the environments and the line-of-sight mass distributions for a sample of strong gravitational lenses as well as establishing their effects on the observed lens properties and the Hubble constant.
520 $a Strong gravitational lenses ought to be able to provide important constraints for cosmology, however the lack of understanding of their large--scale environments has hindered their use. Here, we present a spectroscopic survey of the environments and lines of sight of 28 strong galaxy--mass lenses. We determine redshifts for 9698 galaxies in the fields of these lenses and identify 163 structures with at least five members in 26 fields. We find that 12 of 26 lenses are group members. Six of these groups are newly discovered. Overall, between 38--67% of lenses are in groups, and in 8--31% of the lenses the group makes a significant contribution to the lens potential. Line-of-sight structures are present in virtually every lens field, and in 19% of lenses the structures appear to be a significant perturbation to the lens potential. We consider the effect of the environment on H 0 derived from gravitational lenses. We find that, when the environment is ignored, lenses in groups predict a systematically higher value of H0, inconsistent at the 1o level with H0 derived from isolated lenses. Correcting for the environment and line of sight structures brings the two values into agreement and lowers the combined value ( &parl0;H=66+3.4-3.2&parr0;. Without correction for the environment, the H 0 values from strong lenses should be considered a strict upper limit. We explore the correlation between the observed lens properties and external perturbations from the observational perspective. We find that four-image lenses are statistically more likely to be in groups than two-image lenses. Furthermore, the distributions of convergences are statistically different for quads and doubles. This finding strongly supports the idea that the high quad-to-double ratios are at least partially due to the effect of the environment. We also examine the connections between flux anomalies and environment and the correlations between image separations and convergence. We find no significant links due to the limitations of our sample.
590 $a School code: 0009.
650 4 $a Physics, Astronomy and Astrophysics. $3 1019521
650 4 $a Physics, Theory. $3 1019422
690 $a 0606
690 $a 0753
710 2 $a The University of Arizona. $b Astronomy. $3 1022404
773 0 $t Dissertation Abstracts International $g 70-03B.
790 $a 0009
790 1 0 $a Dave, Romeel $e committee member
790 1 0 $a Impey, Christopher $e committee member
790 1 0 $a Rieke, George $e committee member
790 1 0 $a Zabludoff, Ann, $e advisor
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3350066