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Applications: Applicants should sent a motivation letter (one page decribing interests and motivation to pursue a PhD), a Curriculum Vitae, all relevant University transcripts and proof of adequate knowledge of the English language to Dr. Antonis Georgakakis (age@noa.gr) by 01/03/2024. Two recommendation letters should also be sent to the same email address. The successful candidate will be based at the National Observatory of Athens but will enroll to the postgraduate programme of the University of Crete that will award the PhD degree.
A detailed description of the project offered at the National Observatry of Athens:
- The panchromatic variability properties of Quasars: The PhD project will use large samples of distant QSOs with X-ray multi-epoch observations to quantify the statistical properties (power-spectral density) of their X-ray flux variability. This result will be combined with both independent estimates of the ultraviolet/optical flux variability of QSOs and new physically-motivated simulations of the dynamic accretion flow to place new constraints on the physical scale of the X-ray emitting corona relative to the inner accretion disk (dominating at ultraviolet and optical wavelengths) as a function of black hole mass and Eddington ratio. Statistical methods will be developed to measure the amplitude of the X-ray variability using multi-epoch data from X-ray telescopes. The interpretation of the observational results will use both empirical and physically motivated models developed within the TALES collaboration. The PhD project will be carried out in close collaboration with the researchers from the University of Crete, the Max-Planck Institute for Extraterrestrial physics (MPE), the University of Naples Federico II and the University of Bristol. The successful candidate will enroll to the PhD programme of the University of Crete but will be physically based at the National Observatory of Athens.
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