Dissertation/Thesis Abstract

Modeling the Obscuring Features in Active Galactic Nuclei: An X-Ray Analysis of NGC 1052
by Cabral, Samantha E., M.S., University of Massachusetts Boston, 2020, 60; 27838127
Abstract (Summary)

We present a multi-epoch analysis of the X-ray spectrum of NGC 1052, a nearby galaxy notorious for its well-studied spectral variability. We utilize observations from NuSTAR, XMM-Newton, Chandra, Swift, Suzaku, BeppoSAX, and ASCA to create a comprehensive set of data that spans roughly 20 years. Organizing our data by observation date and grouping into specific epochs allows us to explore a model allowed to flex and accommodate any spectral changes that occur over time in the X-ray spectrum of NGC 1052. We find that the spectrum takes on a relatively flat nature and is best modeled with two neutral absorption components in addition to a component representing torus reprocessing. We are able to successfully constrain properties of the dense obscuring torus, reporting a high covering factor of ∼ 80%.

Indexing (document details)
Advisor: Arnason, Stephen
Commitee: Celli, Jonathan, Yelleswarapu, Chandra, Balokovic, Mislav, Kulkarni, Rahul
School: University of Massachusetts Boston
Department: Applied Physics (MS)
School Location: United States -- Massachusetts
Source: MAI 82/3(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Astrophysics, Astronomy, Physics
Keywords: Active galactic nuclei, AGN, Torus, X-ray
Publication Number: 27838127
ISBN: 9798664791303
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