Author ORCID Identifier
https://orcid.org/0000-0002-4917-7873
Date of Award
8-13-2019
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Physics and Astronomy
First Advisor
Dr. D. Michael Crenshaw
Second Advisor
Dr. Misty C. Bentz
Third Advisor
Dr. Steven B. Kraemer
Fourth Advisor
Dr. Alexander Kozhanov
Abstract
Observations reveal that supermassive black holes (SMBHs) grow through the accretion of gas at the centers of galaxies as luminous active galactic nuclei (AGN), releasing radiation that drives powerful outflows of ionized and molecular gas. These winds are thought to play a critical role in galaxy evolution by regulating star formation and the growth of galaxies and their SMBHs. To test this model, we must quantify the dynamic impact of outflows by measuring their mass outflow rates and energetics. Using spatially resolved spectroscopy and imaging from the Hubble Space Telescope and Cloudy photoionization models we mapped the ionized gas kinematics and mass distributions of narrow line region (NLR) outflows in nearby active galaxies. We find that the outflows contain up to several million solar masses of ionized gas and are limited to distances of 1 - 2 kiloparsecs from the nucleus. The maximum mass outflow rates are M = 3 - 12 solar masses per year and the outflow gas mass, velocity, radial extent, and energetics are positively correlated with AGN luminosity. We use our results to test simplified techniques with less stringent data requirements and find that they significantly overestimate the gas mass. These results are crucial for modeling powerful outflows at higher redshift that may considerably influence star formation rates and the formation of galactic structure.
DOI
https://doi.org/10.57709/14753204
Recommended Citation
Revalski, Mitchell, "Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies." Dissertation, Georgia State University, 2019.
doi: https://doi.org/10.57709/14753204
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