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  • The Formation of Astrophysical Dust

    Creator:
    Mauney, Christopher M.
    Abstract:
    The formation of carbonaceous and silicate precursor molecules to astrophysical dust grains is investigated. Using density functional theory (DFT) in combination with global optimization techniques, the ground-state binding energies of dust precursors are determined. These results are employed in atomistic nucleation theory (ANT) to predict the critical size and nucleation...
    Resource Type:
    Dissertation
    Full Text:
    of Astrophysical Dust Abstract approved: Davide Lazzati The formation of carbonaceous and silicate

  • Off-Axis Gamma Ray Burst Contribution to the Diffuse Gamma Ray Background in the 100-600 keV Range

    Creator:
    Hodges, Isaac
    Abstract:
    Gamma ray bursts (GRBs) are short, intense pulses of gamma rays that emit radiation in a narrow beam. Unless the beam is oriented towards the observer, it is often difficult to resolve the bursts against the diffuse gamma ray background (DGRB). The DGRB is a measured source of gamma rays...
    Resource Type:
    Honors College Thesis
    Full Text:
    . Tueller. Cosmic X-Ray Back- ground and Earth Albedo Spectra with Swift BAT. The Astrophysical Journal, 689

  • Journey to the Center of GW170817: Bayesian parameter estimation of outflows from binary neutron star mergers

    Creator:
    Rodriguez, Isabel J.
    Abstract:
    The discovery of GW170817 provided the first empirical evidence that merging binary neutron star systems are both progenitors of short gamma-ray bursts, as well as the primary sites of the nucleosynthetic rapid-neutron capture process. Initially detected as gravitational wave (GW) and gamma-ray burst (GRB) triggers, GW170817 was well-localized and follow-up...
    Resource Type:
    Masters Thesis
    Full Text:
    . By using Bayesian parameter estimation analysis to connect astrophysical data with numerical models

  • The lag–luminosity correlation in time-resolved episodes of long gamma-ray bursts

    Creator:
    Kowash, Samuel J.
    Abstract:
    We present an analysis of the relationship between spectral lag and luminosity in time-resolved segments of long gamma-ray bursts detected by BATSE, an experiment aboard the Compton Gamma Ray Observatory satellite. For full bursts, there is a well-established correlation between the lag, which is easily computed, and the total burst...
    Resource Type:
    Honors College Thesis
    Full Text:
    Astrophysical Journal, 486(2):928, Sept. 1997. ISSN 0004-637X. doi: 10.1086/304566. URL http

  • Monte Carlo Radiation Transfer Simulations of Gamma Ray Burst Prompt Emission

    Creator:
    Parsotan, Tyler M.
    Abstract:
    Gamma Ray Bursts (GRBs) are the most energetic explosions in the Universe, producing up to $\sim10^{53}$ ergs of energy in the first few seconds of their emission -- the so-called prompt phase that is dominated by high energy X-ray and $\gamma$-ray photons. The very large luminosities released in these events...
    Resource Type:
    Dissertation
    Full Text:
    make measurements of nearly every astrophysical system, each theoretical model that attempts to

  • Deriving relationships between number of observed short gamma ray bursts and viewing angle

    Creator:
    Micallef, John T.
    Abstract:
    Gamma ray bursts are some of the brightest events in the entire observable universe. Since the late 1960’s, thousands of gamma ray bursts have been observed and they have been researched extensively. However, there are still many mysteries which remain unsolved. One such mystery is whether or not the viewing...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    Statistics,” ​The Astrophysical Journal​, vol. 548, no. 2, pp. 522–531, 2001.  [4] ​S. Carroll, “The

  • Stability of accretion disks in binary black hole systems and their effects on merger parameters

    Creator:
    Hanson, Jesse
    Abstract:
    We analyze merger parameters of binary black hole systems (BBHSs), including orbital separation and time at which gravitational and viscous timescales intersect for all combinations of black holes (BHs) in the range 1-100 solar masses. Our initial examination of BBHS merger parameters using the assumption R=0.5r reveals suspicious trends in...
    Resource Type:
    Honors College Thesis
    Full Text:
    ”. The Astrophysical Journal Letters, vol. 826, no. 1, 2016. [4] Cosmic Evolution Galactic. Cosmic

  • Simulating Synchrotron Optical Flashes in the Reverse Shock of a Gamma Ray Burst

    Creator:
    Bice, Connor
    Abstract:
    We construct a Monte Carlo simulation in Python to calculate optical flashes at 5x10¹⁴ Hz peaking at 6x10³¹ erg s⁻¹Hz⁻¹St⁻¹ due to synchrotron radiation from the reverse shock of a gamma-ray burst’s jet. While analytical solutions to this problem exist, they rely on sweeping simplifications of what is necessarily a...
    Resource Type:
    Undergraduate Thesis
    Full Text:
     afterglow and the optical flash.” ​The  Astrophysical Journal ​520​, 641­649. 1999.  5. Rybicki and

  • SpaceLab, an N-Body Particle-Particle Ballistic Collision Simulation Tool with Applications in Celestial Body Dynamics

    Creator:
    Guidos, Job
    Abstract:
    This thesis conveys the key technical features and scientific applications of a particle-particle ballistic simulation tool (SpaceLab) as well as a high level overview of experiments it was designed for and executed on. SpaceLab simulates spherical particle interactions under any combination of self-gravity, sliding friction, rolling friction, Van-Der-Waals (VDW) cohesion...
    Resource Type:
    Masters Thesis

  • Radiative Acceleration and Emission from Relativistic Outflows

    Creator:
    Chhotray, Atul
    Abstract:
    Outflowing streams of matter or jets are a common phenomenon in the observeduniverse. The most extreme and powerful jets are relativistic, i.e., they travel at speedscomparable to the of speed light. Gamma Ray-Bursts (GRBs) and Active Galactic Nuclei(AGNs) are two sources of these relativistic jets. In this work I will...
    Resource Type:
    Dissertation
    Full Text:
    of matter from astrophysical objects is a commonly occurring phenomenon in astrophysics (Livio 1999