PhD ceremony: Mr. P. Lampropoulos, 11.00 uur, Academiegebouw, Broerstraat 5, Groningen
Thesis: The LOFAR epoch of reionization experiment data model: simulations, calibration and inversion
Promotor(s): prof. L.V.E. Koopmans, prof. S. Zaroubi, prof. A.G. de Bruijn
Faculty: Mathematics and Natural Sciences
One of the most exciting applications of LOFAR will be the search for redshifted 21 cm line emission from the Epoch of Reionisation (EoR). The thesis of Panagiotis Lampropoulos examines the relationship between the sky signal and the observed data and discusses a statistically optimal solution for the processing of LOFAR data, that is also computationally efficient.
It is currently believed that the Dark Ages, the period after recombination when the Universe turned neutral, lasted until around the Universe was 400,000 years old. During the EoR, objects started to form in the early universe and they were energetic enough to ionize neutral hydrogen. The most prominent method to unravel the string leading to this epoch is the 21-cm line of neutral hydrogen, the most abundant element in the Universe. Due to the expansion of the Universe, this line is redshifted to the low regime of the radio spectrum with wavelengths of the order of a few meters. The sensitivity required to achieve this scientific goal, essentially translates into accumulating large amounts of data. Furthermore, the data have to be corrected for instrumental and atmospheric distortions to an unprecedented level.
George Azzopardi and Guru Swaroop Bennabhaktula from the Faculty of Science and Engineering have won the Ben Feringa Impact Award 2023 for their project ‘4NSEEK; Forensic Against Sexual Exploitation of Children’. In the ‘students’ category, Nine van...
During her scientific career, Jeanine Olsen has collaborated closely with the University of Gothenburg in her research on different species of brown algae and seagrass.
Dr. Jagoda Slawinska of the Zernike Institute for Advanced Materials receives an M1 grant and Prof. Eline Tolstoy of the Kapteyn Astronomical Institute an M-invest grant.
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