Instrumentation development of innovative radio-devices to improve the coming cycles of radio astronomy observations
|PhD ceremony:||D.A. Montofre|
|When:||July 07, 2020|
|Supervisors:||prof. dr. A.M. (Andrei) Barychev, prof. F.P. Mena Mena|
|Where:||Academy building RUG|
|Faculty:||Science and Engineering|
Radio astronomy represents one of the most useful tools for investigating celestial objects such as sychrontronic emissions from quasar , molecular clouds in the interstellar medium, and a black hole event horizon . All this is possible due to the great sensitivity that astronomical receivers can achieve, and the high angular resolution that can be reached using interferometric techniques. However, despite the great effort made, radio astronomy is not exempt of limitations that prevent it from deploying its maximum capability in terms of resolution. Atmospheric phase fluctuations, mainly induced by turbulent currents, are primarily responsible. Failure to correct these phase fluctuations will impede that the maximum potential of radio astronomy can be realized.
In this thesis work, a novel solution to solve the drawbacks related to phase fluctuations in high frequency observations is presented. The ALMA telescope in Chile , has been selected as a target. The idea is to use an external optical system at room temperature, which can illuminate a low and a high frequency receiver, simultaneously. In this way, the solution for the phase fluctuation can be transferred from low to high frequency, thus, extending the maximum baseline for interferometric observations at high frequencies .