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CC BY V4.0, Open Access
Dissertation
Construction and Analysis of an Active Dwarf Galaxy Database
Washington State University
Doctor of Philosophy (PhD), Washington State University
05/2025
DOI:
https://doi.org/10.7273/000007496
Abstract
At the center of all massive galaxies (M∗ ≳ 1010M⊙) resides a super massive black hole (SMBH). The growth and evolution of SMBHs alongside their host galaxies is not well understood. Dwarf galaxies serve as an avenue to investigate the progression of central BH and their host galaxy at lower mass scales which are reminiscent of massive systems at earlier times. However, the population of BHs in the center of dwarf galaxies is difficult to identify and
characterize. Accretion signatures of SMBHs form across the electromagnetic spectrum has been used to identify SMBH in massive galaxies. Within this thesis work, we work towards identifying actively accreting BHs in dwarf galaxies while investigating the biases of the selections methods built for massive galaxies. We select active BHs in galaxies across the mass range using ultraviolet variability and categorize their optical spectrum and infrared colors.
We use their x-ray emissions to construct spectral energy distribution models to explore relationships of emissions to massive active galaxies. Moreover, we compile a database of dwarf galaxies that were selected as active from a list of previous studies. Utilizing archival data, we investigate the recovery rate of each active BH selection technique applied to this database. Finally, we draw conclusions about the biases of each selection technique in connection with
host galaxy parameters.
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Details
- Title
- Construction and Analysis of an Active Dwarf Galaxy Database
- Creators
- Erik Joseph Wasleske
- Contributors
- Vivienne F Baldassare (Chair)Guy Worthey (Committee Member)Matt D Duez (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Department of Physics and Astronomy
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 219
- Identifiers
- 99901220448001842
- Language
- English
- Resource Type
- Dissertation