Browsing by Author "Dai, Xinyu"
Now showing items 1-15 of 15
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ACTIVE GALACTIC NUCLEI IN THE ULTRAVIOLET SPECTRUM
Cooper, Erin (2016-05-13)Active Galactic Nucleus (AGN) produce rich, luminescent spectra across the electro- magnetic spectrum. This work focuses on topics in the ultraviolet region, where lie the broad absorption line outflows innate to Broad ... -
AGN and their environment: a multi-wavelength photometric and spectroscopic study of AGN and galaxy clusters, and the co-evolution of AGN and the large scale structures
Mishra, Hora (2022)Active galactic nuclei (AGN) are the central engines hosted by most of the galaxies in the universe and are believed to be actively accreting supermassive black holes. The growth of the central black hole is very closely ... -
Baryogenesis Scenarios for Natural Supersymmetric Particle Physics Models
Zhang, Yifan (2019-12-06)Supersymmetric models with radiatively-driven electroweak naturalness require a light higgsino of mass ∼ 100 − 300 GeV. Naturalness in the QCD sector is invoked via the Peccei-Quinn (PQ) axion leading to mixed axion-higgsino ... -
BARYON CONTENT TO THE OUTSKIRTS OF LOW-TEMPERATURE POOR GALAXY GROUPS
Nugent, Jenna (2019-12-05)Little is known concerning the overall properties of galaxy groups, especially at large radii. A better understanding of them will constrain numerical simulations regarding their formation and evolution, as well as reveal ... -
Co-Spatial UV-Optical HST/STIS Spectra of Seven Galactic Planetary Nebulae: Nebular and Stellar Properties
Miller, Timothy (2017)This project had two main goals: (1) to investigate to what extent planetary nebulae (PNe) are chemically homogeneous; and (2) to provide physical constraints on the central star properties of each PN. The first goal was ... -
COMPLEX P-LAPLACIAN ON KAHLER MANIFOLDS AND ITS APPLICATIONS
Qu, Hong (2014-12)From a geometric point of view, we use coordinates as the main tool to define the holomorphic gradient, the antiholomorphic gradient, and the complex gradient of a complex-valued function on Kahler manifolds. Then we define ... -
COSMOLOGY WITH TYPE IA SUPERNOVAE: ROBUST TECHNIQUES FOR DATA ANALYSIS AND PHOTOMETRIC CLASSIFICATION
Dai, Mi (2017-05)Since the accelerating expansion of the Universe was discovered by observing distant Type Ia supernovae (SNe Ia), SNe Ia have been playing an important role in constraining the unknown cause behind the observed cosmic ... -
Dust Formation and Destruction in Core Collapse Supernovae Explosions
Stangl, Sarah (2024)Dust is a crucial component of the Interstellar Medium (ISM) and an important driver in many astrophysical processes. Dust formed from evolved stars increases the metallicity of the ISM, enriching it with heavier elements. ... -
Dwarf galaxies in N-body+SPH simulations
Van Nest, Jordan (2023-12)I present a study of various dwarf galaxies from N-body+SPH simulations in Lambda Cold Dark Matter cosmology. While the science results of this thesis pertain to dwarf galaxies of varying classifications and environments, ... -
Galaxy Clusters Across the Electromagnetic Spectrum
Griffin, Rhiannon (2016-12)Galaxy clusters are the largest gravitationally bound objects in the Universe. From radio to X-ray, we have observed these objects across the electromagnetic spectrum. Formation theories suggest that clusters even emit ... -
The Search for White Dwarf Binaries in Astronomical Survey Data
Kosakowski, Alekzander (2021-07-23)Extremely low mass (ELM) white dwarfs are excellent laboratories for studying a variety of astrophysical phenomena, including common-envelope evolution, gravitational wave emission, and merger physics. A significant amount ... -
Spectrum Formation at Late Times in Type Ia Supernovae
Friesen, Brian (2015-05-08)I present a study of radiative transfer effects in type Ia supernovae ranging from 3-4 months to nearly 2 years post-maximum light. I explore several components of spectrum formation, beginning with a semi-analytic model ... -
Spotting clusters, hunting for planets: a combined study of galaxy clusters in the X-ray and optical regime
Bhatiani, Saloni (2022-08)Observational studies of the distribution of galaxies in the Universe reveal inhomogeneity and structure on Mpc and larger scales. Galaxy clusters are the largest gravitationally bound structures containing a virialized ... -
An Ultraviolet Survey of the DA White Dwarf Population of the Galaxy
Wall, Renae E. (2023-08-04)DA white dwarfs are the most common type of white dwarf in our Galaxy. Hence, it is important to study the DA white dwarf population as thoroughly as possible. In this dissertation, I present our work using the Galaxy ... -
Various Topics in Type Ia Supernovae
Jenks, Malia (2019-05-11)This work takes two approaches to increasing our understanding of type Ia supernovae. The first part uses observations to study their spectral evolution and diversity. The second part uses modeling to investigate a potential ...