PhD student fellowship position at Center for Theoretical Physics PAS

The Director of the Center for Theoretical Physics PAS invites applications for PhD student fellowship at the CTP PAS, financed from the project MAESTRO 15 Dynamics of processes around compact stars funded by National Science Center (grant registration number: UMO 2023/50/A/ST9/00527). PI of the project is Prof. dr hab. Agnieszka Janiuk.

The aim of the project is to study accretion flows around compact stars, such as black
holes and neutron stars. Using numerical computer simulations, a model of the accretion disk instability driven by a dominant radiation pressure (RPI), will be studied. It has been shown that in RPI, a selfregulated process leads to cyclic oscillations of disk temperature, density and luminosity in the unstable parts, which can be modeled numerically . The development of the dynamical model specifically addressed to accreting stellar mass black holes (Janiuk et al. 2002) was motivated by discovery of the seminal source, microquasar GRS 1915+105. Later on, subsequently found other microquasars have proven to be subject to RPI (Sukova et al. 2016). In the context of supermassive black holes, statistical studies were used (Czerny et al. 2009) to shed light on the problem. Most recently, however, a new class of sources called changinglook (CL) AGN are observed, where the tentative timescales of their eruptions are suggesting the RPI in action (Miniutti et al. 2019). Most recently, neutron stars have been invoked in this context as well (Vincentelli et al. 2023).

The scope of work of the successful Candidate within the project will be on devel
opment of numerical simulations and analysis of observational data related to the radiation pressure instability driven flares in accreting compact stars.

We expect the candidates to have:
Master’s degree in physics or astronomy,
Good theoretical and numerical background.
interest in fluid dynamics and magnetohydrodynamics,
independence and creativity in solving problems.
knowledge of astronomical data reduction and analysis (Xray spectroscopy and polarimetry) will be a plus.

The application must include:
  1.  The scientific CV, including the progress in the university studies, scientific achievements (publications, participation in research projects and conferences), with the clause “I agree to the processing of my personal data contained in the application documents for the purposes necessary for the implementation of the process recruitment by the doctoral school GeoPlanet“.
  2. Cover letter.
  3. A copy of the master’s degree diploma, or a statement from the Candidate’s MSc Advisor about the planned date of diploma obtaining
  4. Copies of documents confirming scientific or professional achievements.
  5. Two letters of recommendation from a researcher with at least a PhD degree, concerning the candidate and his/her current scientific activity.
  6. Application for admission to the Geoplanet doctoral school (Attachment No. 1).

The application should be submitted electronically
to the email between 20240403 and 20240531. In the email’s title please add the reference number: AJ/04/2024. Selected Candidates will be invited to an interview, to be held in the 2nd week of June (0610 to 0614). The scholarship will be awarded in accordance with the applicable law in Poland and the regulations of the National Science Centre (NCN), amounting to approximately 4700 PLN net per month.

The competition will be settled by 2024
0630. Candidates will be informed electronically on the results of the competition. Admission to the GeoPlanet Doctoral School and the beginning of the scholarship are scheduled for 20241001.
Link to information on the GeoPlanet Doctoral School:
Link to the Project Supervisor’s website:

If you have any questions, please send an email to: