Search for dissertations about: "21-cm"
Showing result 1 - 5 of 6 swedish dissertations containing the word 21-cm.
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1. Tomographic study of the 21-cm signal
Abstract : The next generation radio telescopes such as the Square Kilometre Array (SKA) will be able to produce images of the redshifted Hi (neutral hydrogen) 21-cm signal from the Epoch of reionization (EoR). In this thesis, we use the simulated tomographic images of the signal and investigate methods to extract and interpret information from those images. READ MORE
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2. Tomographic studies of the 21-cm signal during reionization : Going beyond the power spectrum
Abstract : The formation of the first luminous sources in the Universe, such as the first generation of stars and accreting black holes, led to the ionization of hydrogen gas present in the intergalactic medium (IGM). This period in which the Universe transitioned from a cold and neutral state to a predominantly hot and ionized state is known as the Epoch of Reionization (EoR). READ MORE
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3. Understanding the large-scale structure of the the21-cm signal originating from the Epoch of Reionisation
Abstract : The first billion years from the beginning of the Universe is the focus of multiple astronomical facilities in the upcoming decade. This unique era is marked by the formation of the first stars and galaxies, which release ionising radiation into the intergalactic medium(IGM). READ MORE
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4. Simulating observational probes of reionization
Abstract : The time in the history of the Universe when the first stars and galaxies formed and ionized the gas in the intergalactic medium is known as the Epoch of Reionization. This transformative time period, which took place within the first billion years after the Big Bang, is still relatively unexplored due to the significant difficulties associated with observing so far back in time. READ MORE
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5. Next Generation Wideband Antenna Arrays for Communications and Radio Astrophysics
Abstract : Wideband, wide-scan antenna arrays are a promising candidate for the future wireless networks and as well as an essential part of experimental radio astrophysics. Understanding the underline physics of the element performance in the array environment is paramount to develop and improve the performance of array systems. READ MORE