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Supermassive Black Hole Scaling Relations, Ismaeel Abdulla Akhlite Al-Baidhany
Supermassive Black Hole Scaling Relations, Ismaeel Abdulla Akhlite Al-Baidhany
Theses and Dissertations
In this dissertation, the determination of the masses of supermassive black holes (SMBHs) and the properties of their host spiral galaxies are focused for the purposes of constraining scaling relations and with the aim of understanding the role of SMBHs in the evolution of galaxies. The several techniques in this work as summarized are focused on in Chapter 2. Direct techniques (reverberation mapping, stellar and gas dynamics, maser modeling) and indirect techniques (the SMBH mass versus stellar/gas velocity dispersion relation and the SMBH mass versus spiral arm pitch angle relation) have been used to estimate SMBH masses. Then the measurement …
Determination Of Resonance Locations In Barred Spiral Galaxies, Amber Sierra
Determination Of Resonance Locations In Barred Spiral Galaxies, Amber Sierra
Theses and Dissertations
We applied a method identified by Puerari & Dottori (1997) to find the corotation radii of 57 galaxies. This entailed taking Fourier transforms along radial cuts in the u, g, r, i, and z wavebands and comparing the phase angles as a function of radius between them. The radius at which the phase angles cross indicates the location of the corotation radius. We then calculated the relative bar pattern speed, R and classified the bar as fast, less than 1.4, or slow, greater than or equal to 1.4. Finally, we found that our results were consistent with previously determined values …