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Title: Doppler Boosting and cosmological redshift on relativistic jets
Author: Fernández Vilana, Jordi
Director/Tutor: Bosch i Ramon, Valentí
Keywords: Blàzar
Efecte de Doppler
Jets (Astrofísica)
Treballs de fi de grau
Doppler effect
Astrophysical jets
Bachelor's theses
Issue Date: Jun-2020
Abstract: In this study our goal was to identify the possible effects that influence with the Spectral Energy Distribution of a blazar, which we deducted that are Doppler Boosting effect and cosmological redshift. Then we investigated how the spectral energy distribution varies by changing intrinsic parameters of the jet like its Lorentz factor, the angle of the line of sight respect to the jet orientation or the blazar redshift. The obtained results showed a strong enhancing of the Spectral Energy Distribution for nearly 0º angles and high Lorentz factors, while the increase in redshift produced the inverse effect, reducing the normalization of the distribution and moving the peak to lower energies. These two effects compete in the observations of all known blazars and our simple model confirmed the experimental results, that only those blazars with optimal characteristics, if at very high redshift, are suitable to be measured by the actual instruments, making the study of blazars with a high redshift an issue that needs very deep observations at different wavelengths to collect enough data to properly characterize the source population
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2020, Tutor: Valentí Bosch i Ramon
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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