자료유형  

 학위논문

Control Number  

0017163830

International Standard Book Number  

9798384093725

Dewey Decimal Classification Number  

520

Main Entry-Personal Name  

Tran, Debby.

Publication, Distribution, etc. (Imprint  

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

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

159 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

General Note  

Advisor: Williams, Benjamin;Levesque, Emily.

Dissertation Note  

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

Summary, Etc.  

요약I analyze resolved near-ultraviolet (NUV) stellar photometry of star-forming galaxy NGC 6946 (The Fireworks Galaxy) taken with the Hubble Space Telescope's (HST) Wide Field Camera 3 (WFC3) with F275W and F336W filters to put new constraints on the relationships between the spatial distribution of ages, formation rate, masses, colors, and luminosity for massive stars and massive star clusters. In Chapter 2, we observe a correlation between age and density in the spiral arms and test diagnostics for star formation rate (SFR) and whether they are consistent with the unusually high observed rate of supernovae (10 in the past century). In Chapter 3, I modify a computer-vision algorithm to automate cluster candidate finding and produce a cluster and association candidate catalog. I measure the luminosity, effective radius, and color of each of the candidates. With the catalog obtained in Chapter 3, in Chapter 4, I constrain the cluster mass-radius relation and mass function of clusters. We measure the age of the clusters and determine the cluster formation efficiency of NGC 6946. We will publicly release this new clustering algorithm to the community and this observational data enabling detailed comparisons to numerical simulations. In Chapter 5, my future work, I discuss my progress and plans to measure an additional 13 bands (∼200 visits) of archival optical and infrared (IR) HST WFC3 and Advanced Camera for Surveys (ACS) photometry of individual stars and clusters covering some areas in NGC 6946. With the planned stellar photometry catalog, I will fit spectral energy distributions (SEDs) for over 8 million stars in NGC 6946 to investigate how local environments and large scale mechanisms influence the formation of stars.

Subject Added Entry-Topical Term  

Astronomy.

Subject Added Entry-Topical Term  

Astrophysics.

Subject Added Entry-Topical Term  

Physics.

Index Term-Uncontrolled  

Extragalactic

Index Term-Uncontrolled  

Massive stars

Index Term-Uncontrolled  

Star formation

Index Term-Uncontrolled  

Stellar populations

Index Term-Uncontrolled  

Spectral energy distributions

Added Entry-Corporate Name  

University of Washington Astronomy

Host Item Entry  

Dissertations Abstracts International. 86-03B.

Electronic Location and Access  

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Control Number  

joongbu:657142