eprintid: 32691
rev_number: 14
eprint_status: archive
userid: 7159
dir: disk0/00/03/26/91
datestamp: 2023-01-20 08:10:07
lastmod: 2023-01-30 13:02:42
status_changed: 2023-01-20 08:10:07
type: doctoralThesis
metadata_visibility: show
creators_name: Giesel, Eileen Sophie
title: On astrophysical solutions in the constructive gravity program and cosmological tests for weakly birefringent spacetime
subjects: ddc-530
divisions: i-130001
adv_faculty: af-13
abstract: Via gravitational closure [Dü+18]; [Wol22]; [Due20]; [Wie18] could show, how gravitational
theories based on the matter content of spacetime can be systematically constructed. While
this successfully reproduces general relativity for metric spacetimes, finding a solution for the
simplest generalization of Maxwell electrodynamics with a vacuum birefringence allowing,
area-metric structure has in general not been possible so far. For highly symmetric FLRW
spacetimes a metric, as well as an area-metric solution could be derived [Due20]; [Fis17].
Based on this result, the constructive gravity program will be applied for spherically symmetric,
stationary metric spacetimes. Furthermore, an according ansatz is worked out for
area-metric geometries, and it is discussed which difficulties arise in finding a corresponding
solution. Furthermore, the Etherington-duality is violated in the case of weakly area-metric
gravitation [Sch+17]; [Ale20b]; [SW17], and this violation will be investigated with weak
gravitational lensing experiments. The observable is the surface brightness, which is, however,
heavily influenced by astrophysical processes like physical interaction of galaxies with tidal
fields. Beyond that, it is studied how galaxies also get bent due to tidal interactions and how
strong this effect is compared to its analog in gravitational lensing.
date: 2023
id_scheme: DOI
id_number: 10.11588/heidok.00032691
ppn_swb: 1831826445
own_urn: urn:nbn:de:bsz:16-heidok-326914
date_accepted: 2023-01-11
advisor: HASH(0x561a6280b648)
language: eng
bibsort: GIESELEILEONASTROPHY20230113
full_text_status: public
place_of_pub: Heidelberg
citation:   Giesel, Eileen Sophie  (2023) On astrophysical solutions in the constructive gravity program and cosmological tests for weakly birefringent spacetime.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/32691/1/Dissertation_Giesel_Eileen.pdf