Global ETD Search
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Showing 1 to 7 of 7 for “"primordial black hole"”.
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Primordial black hole seeding from hybrid inflation : the direct integration approach
We examine the notion that supermassive black holes at the centre of galaxies, such as the Milky Way, could have been seeded in the early universe by the mechanisms of hybrid inflation. Using luminosity data, we estimate the current density of supermassive black hole. We develop the formalism of …
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Search for antideuterons and strangelets in cosmic rays with AMS-01
… signal for neutralino dark matter annihilation, primordial black hole evaporation and other interesting processes. No DÌ nuclei were found, and a flux limit is estimated. We also present the results of preliminary strangelet search. Some interesting effects of the Mir space station on AMS-01 …
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Courting Serendipity: The Search for Transient Radio Signals
… observed. These sources include pulses from primordial black hole explosions and prompt emission associated with gamma ray bursts. A search could also reveal extreme-period pulsars or giant-pulsing extragalactic pulsars. Here we present three transient-seeking algorithms suitable for …
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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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Exploring fundamental physics and astrophysics with gravitational-wave sources
… observations, I study how multiple binary black hole (BBH) spin measurements can be combined by hierarchical Bayesian framework to search for ultralight bosons (e.g., axions). This search relies on the process called superradiance, in which boson clouds form around fast spinning black holes …
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Foundational Investigations & Astronomical Implications of Quantum Gravity
… system. We also consider an evaporating black hole in the presence of an extra spatial dimension would undergo an explosive phase of evaporation. We show that such an event, involving a primordial black hole, can produce a detectable, distinguishable electromagnetic pulse, signaling the …
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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 …