자료유형  

 학위논문

Control Number  

0017162261

International Standard Book Number  

9798383227077

Dewey Decimal Classification Number  

523

Main Entry-Personal Name  

Storer, Dara.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of Washington., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

202 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-01, Section: B.

General Note  

Advisor: Morales, Miguel.

Dissertation Note  

Thesis (Ph.D.)--University of Washington, 2024.

Summary, Etc.  

요약The 21 cm signal from neutral hydrogen is a powerful probe for observing the Epoch of Reionization, a period in cosmological history when the first stars and galaxies were forming. Observing this epoch would give astronomers tremendous insight into the underlying physics driving structure formation in the early universe. However, the 21 cm signal is incredibly faint, and therefore measurements will require high precision instruments and analysis techniques.This thesis works with data from the Hydrogen Epoch of Reionization Array, a radio interferometer designed to observe the 21 cm signal. We present efforts to identify and mitigate instrumental systematics, and explore their direct influence on our ability to achieve successful measurements. Through this, we present new and informative tools for data quality assessment in a many-element interferometer. This includes both statistical and visual data inspection techniques that allow observers to succinctly inspect extremely large volumes of data. Additionally, we make use of interferometric imaging techniques to pursue a power spectrum measurement. This work represents the first imaging-based power spectrum results with HERA phase II. We find a feature that inhibits our power spectrum measurement at some modes, but are noise limited at others. Our results indicate that with a deeper integration HERA has the potential to place scientifically interesting upper limits on the 21 cm signal at some power spectrum modes.

Subject Added Entry-Topical Term  

Astrophysics.

Subject Added Entry-Topical Term  

Astronomy.

Subject Added Entry-Topical Term  

Physics.

Index Term-Uncontrolled  

21 cm

Index Term-Uncontrolled  

Cosmology

Index Term-Uncontrolled  

Epoch of Reionization

Index Term-Uncontrolled  

Interferometry

Index Term-Uncontrolled  

Radio

Added Entry-Corporate Name  

University of Washington Physics

Host Item Entry  

Dissertations Abstracts International. 86-01B.

Electronic Location and Access  

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Control Number  

joongbu:653831