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 7 of 7 for “"Active galaxy"”.
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Empirical Measurements of Massive Galaxy and Active Galaxy Evolution
Using new wide-area galaxy redshift surveys, we explore the evolutionof the most massive galaxies and the most luminous quasars in the universe over much of cosmic history. Quasars and massive red galaxies both areextremes; the most luminous high redshift quasars likely play a key role in shaping …
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Statistical methods for the search of high energy neutrinos from galactic sources in KM3NeT and ANTARES telescopes
… example, to roughly the distance of the nearest active galaxy. In contrast, neutrinos o er a means to study the universe at very high energies or large distances. Very high energy gamma-ray sources are good candidate as neutrino sources if their emissions are originated from an hadronic-model …
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The analysis of some bivariate astronomical time series
… fitted to satellite observations of a variable galaxy, NGC5548. The transfer functions relate an input series (ultraviolet continuum flux) to an output series (emission line flux). The methodology for fitting transfer function is briefly described. The autocorrelation structure of the …
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Infrared to millimetre observations of active galaxies
… from the nuclear regions of a number of active galaxies. In particular many observations have been made for the first time in the submillimetre regime. The observing methods at these wavelengths and the unique astrophysical information on the nature of active galaxies that results from …
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X-ray and optical properties of X-ray luminous active galactic nuclei
… below 2 keV into single point sources, mainly active galaxies. The cosmic X-ray background is the integration of all accreting super-massive (several million solar masses) black holes in the centre of active galaxies over cosmic time. Synthesis models need further populations of X-ray absorbed …
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Understanding the Nature of Blazars High Energy Emission with Time Dependent Multi-zone Modeling
In this thesis we present a time-dependent multi-zone radiative transfer code and its applications to study the multiwavelength emission of blazars. The multiwavelength variability of blazars is widely believed to be a direct manifestation of the formation and propagation of relativistic jets, and …