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Gravitational Wave Echoes: Theory and Application.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Gravitational Wave Echoes: Theory and Application./
作者:	Conklin, Randy S.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	165 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-06, Section: B.
Contained By:	Dissertations Abstracts International83-06B.
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28768040
ISBN:	9798496548274

Gravitational Wave Echoes: Theory and Application.
Conklin, Randy S.

Gravitational Wave Echoes: Theory and Application. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 165 p.

Source: Dissertations Abstracts International, Volume: 83-06, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2021.

This item must not be sold to any third party vendors.

Black hole mimickers may compose some of what is assumed as the black hole population, and multiple groups have claimed evidence for this in the form of gravitational wave echoes. This thesis elaborates on work by the author and collaborators, detailing echo theory and discussing hints of echoes in gravitational wave data from the LIGO observatory.Echoes from a variety of exotic compact objects are compared, and the effects of spin are investigated. The most characteristic feature of echoes, a series of spectral resonances, is exploited to look for this structure in LIGO data via windowing methods.These resonances are modulated by an initial-condition-dependent source integral, and it is shown that echo features traditionally assumed to be known may be altered by generic production mechanisms. The complete modulation in all variables is calculated, and the impact on echoes is displayed. An analytical method is constructed to test asymptotic radial perturbations. Quantum quadratic gravity is a theory capable of producing echoes, and it can be made renormalizable with ultraviolet completions. It may also satisfy the optical theorem under certain conditions, and these are reviewed and further explored through two subjects: the physical particle spectrum and the complex prescription of propagators. Required conditions for unitarity are defined along with their consequences, and the consistency of the theory is tested against these.The search for echoes is then continued in a recently detected gravitational wave event, GW190521, by employing the latest developments in echo theory. Combining advancements in physical boundary conditions, numerical relativity, and complex representation of the echo spectrum, a model is built to seek for physically motivated echoes across background parameters of mass, spin, and geometry. The search is done over Monte Carlo chains distributed according to background parameter probabilities, with significance assessed by signal to noise ratios and statistical analysis.Potential echo detections in the LIGO events GW151226, GW170104, GW170608, GW170814, and GW170817 are presented with false alarm rates of 1 in 700 or less using the older windowing methods. The latest model is employed to find a false alarm rate of 1 in 50 in GW190521.

ISBN: 9798496548274Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Black holes

Gravitational Wave Echoes: Theory and Application.
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