Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Primordial Black Holes"”.
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Formalism for the rapid evolution of primordial black holes
… This allows us to efficiently determine if a black hole will form, but due to the formation of a singularity, it does not allow us to extract the black hole's mass. The second, new, formalism allows us to evolve the density perturbation past the formation of a singularity until a time where we …
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Illuminating the Cosmos: dark matter, primordial black holes, and cosmic dawn
… probes, including the Lyman-α forest, the blackbody spectrum of the cosmic microwave background, the power spectrum of the cosmic microwave background, and the formation of the earliest stars in our universe. Second, I have investigated the formation of primordial black hole dark matter in …
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Cosmic Echoes of the Early Universe: From Primordial Black Holes to Gravitational Waves
Our framework for describing physics on quantum scales, the Standard Model of particle physics, is both gloriously successful and self-evidently incomplete. Generations of particle physicists have hoped to fill the gaps in our framework by looking for new physics in a few specific ways. For …
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All-Sky Search for Very-High-Energy Emission from Primordial Black Holes and Gamma-Ray Bursts with the HAWC Observatory
… searches for two types of transient sources--- Primordial Black Holes (PBHs) and Gamma-Ray Bursts (GRBs). The first of these, a search for emission signatures of evaporating PBHs, is performed on 959 days of HAWC data for remaining lifetimes of 0.2, 1, 10, and 100 s, assuming radiation …
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Localization and Lensing of Fast Radio Bursts using CHIME/FRB and its VLBI Outriggers
… new way to use FRBs as probes of sub-solar mass primordial black holes. By exploiting multi-path interference in gravitational lensing, I conducted a novel search for lensed FRBs. We find that some FRBs exhibit plasma lensing (scintillation), which we attribute to the Milky Way’s interstellar …
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The Search for High-Frequency Gravitational Waves with a Modified Axion Detector
… frequencies may indicate signs of in-spiraling primordial black holes, or other beyond the standard model phenomena. With careful calibration used to distinguish between the two signals, we introduce the first simultaneous search for both axions and gravitational waves using a lumped-element …
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A Dedicated Search for Low Frequency Radio Transient Astrophysical Events using ETA
… phenomena such as self-annihilation of primordial black holes (PBHs), gamma ray bursts (GRBs), and supernovae are expected to produce single dispersed pulses detectable in the low end of the radio spectrum. Analysis of these pulses could provide valuable information about the sources, …
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A Pilot Survey for Astronomical Low Frequency Radio Transients
… astronomical pulses may result from exploding primordial black holes, gamma ray bursts, supernovae, or mergers of exotic objects, but have not yet been detected. Detection would be of great scientific significance because such events must involve extreme physics. The transient nature of these …
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A Blind Search for Bursts of Very High Energy Gamma Rays with Milagro
… from the last stages of the evaporation of Primordial Black Holes (PBHs) or to any other kind of phenomena that produce bursts of VHE gamma rays. Measurements of the GRB spectra by satellites up to few tens of GeV showed no signs of a cutoff. Even though multiple instruments sensitive to …
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A Search for Astrophysical Radio Transients at Meter Wavelengths
Astrophysical phenomena such as exploding primordial black holes (PBHs), gamma-ray bursts (GRBs), compact object mergers, and supernovae, are expected to produce a single pulse of electromagnetic radiation detectable at the low-frequency end of the radio spectrum. Detection of any of these pulses …
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The distribution of dark matter at large scales and in gravitational lenses
… in which the contribution of $10-10^3M_{\odot}$ primordial black holes (PBHs) as a potential dark matter constituent is examined. I review the theory of gravitational lensing, the current state of galaxy-galaxy lens modeling, and the causes of anomalous flux density ratios between strongly lensed …
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Applications of X-ray Instrumentation for Dark Matter Searches with Cosmic-ray Antiparticles
… sensitive to models of dark matter, evaporating primordial black holes, and cosmic ray propagation. It will also validate the exotic atom particle identification technique prior to the other GAPS analyses. Beyond local detection in high-altitude particle detectors, cosmic ray populations can be …
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A study of the feasibility of detecting primordial microscopic black hole remnants with the NOvA far detector
Several papers have argued that microscopic black holes may be stable against complete evaporation and may be a viable dark matter candidate [1–3]. This paper assesses the practicality of detecting these objects using long-baseline neutrino facilities, such as the NuMI Off-Axis νe Appearance (NOvA) …