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Fall 2016

Bahramian, Arash

Low mass X-ray binaries (LMXBs) are systems of compact stellar remnants accreting from a low mass companion star. These systems show various levels of mass transfer on various timescales. Many aspects of accretion in these systems are still not fully understood, specifically the emission...

Fall 2014

Tetarenko, Alexandra Jean

Accreting astrophysical sources are an important end-result of intricate stellar dynamics. A particularly puzzling aspect of this accretion process is the production and evolution of plasma outflows (known as jets). Although astrophysical jets have been studied for decades in accreting sources,...

Fall 2018

Tetarenko, Alexandra Jean

Astrophysical jets are ubiquitous phenomena in our universe, linked to a wide range of objects, from young stars to black holes. These powerful, highly collimated outflows deposit significant amounts of energy and matter into the surrounding medium, affecting star formation, galaxy evolution, and...

Fall 2018

Tetarenko, Bailey E.

Recurring outbursts associated with matter flowing onto compact stellar remnants (black holes and neutron stars) in low-mass X-ray binary systems provide constraints on the poorly understood accretion process. Multi-wavelength light-curves and spectra of these bright outbursts provide powerful...

Fall 2021

Zhao, Yue

Globular clusters (GCs) are dense and massive stellar populations, which provide a unique environment where the high stellar density facilitates frequent dynamical encounters, creating many exotic binaries. These exotic binaries generally have short orbits and often harbour compact objects,...

Fall 2019

Hebbar, Pavan R.

Massive stars end their life through explosive supernovae, leaving behind supernova remnants (SNRs) and forming neutron stars (NSs) or black holes (BHs). Studying the X-rays emitted from BHs, NSs, and SNRs allows us to investigate the high energy processes producing this radiation....

Fall 2012

Yaghoobpour Tari, Shima

The Einstein equation with a negative cosmological constant \lambda in the five dimensions for the Randall-Sundrum II model, which includes a black hole, has been solved numerically. We have constructed an AdS5-CFT4 solution numerically, using a spectral method to minimize the integral of the...

Spring 2016

Pavlovskii, Konstantin

In this thesis we study MT from giant and subgiant donors in binary stars. We develop a MT simulation framework based on the MESA set of stellar libraries, which is suitable to study extremely high MT rates and predict the stability of MT. We find that the MT from giant donors is much more stable...

Fall 2014

Tetarenko, Bailey E

Stellar mass black holes (BHs) accreting in binary systems provide valuable insight into how binary systems evolve and how mass is transferred via accretion. Although in recent years a canonical picture of the outburst evolution in black hole X-ray binaries (BHXRBs) has emerged, these systems...

Fall 2023

Fahlman, Steven

We examine the long-term evolution of accretion tori around the remnants of compact object mergers and the explosions of highly magnetized massive stars to better understand their roles in the creation of optical transients and the synthesis of r-process elements. We begin by modifying the...