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22 Oct 2024

Job Information

Organisation/Company
CAMK PAN
Research Field
Astronomy » Astrophysics
Researcher Profile
First Stage Researcher (R1)
Positions
PhD Positions
Country
Poland
Application Deadline
Type of Contract
Temporary
Job Status
Full-time
Hours Per Week
40
Offer Starting Date
Is the job funded through the EU Research Framework Programme?
Horizon Europe - MSCA
Reference Number
HORIZON-MSCA-2023-DN-01-01
Marie Curie Grant Agreement Number
101168906
Is the Job related to staff position within a Research Infrastructure?
No

Offer Description

Summary:

The PhD project will use an outcome of optical/ultraviolet and X-ray variability analysis of AGNs, to constrain the structure and physical conditions of the accretion disk, its connection to winds and BLR. This task will be achieved by developing and testing a phenomenological multi-phase model of accretion flows based on the assumptions of a magnetically supported disk and the equilibrium between magnetic heating and radiative cooling. The PhD candidate will extend a multi-phase accretion model by implementing temporal properties and predictions on multiwavelength variability and dynamical behaviour by implementing momentum equation. The comparison to the data will be a final step and PhD conclusion on the importance of multi-phase accretion in AGN evolution. 

The TALES doctorate network in a nutshell:

The offered PhD position is part of the TALES (Time-domain Analysis to study the Life-cycle and Evolution of Supermassive black holes) Doctorate Network, a consortium of 10 astrophysics research groups, 8 industrial and 4 academic partners spread across Europe that aims to study the feeding and feedback cycle of supermassive black holes. The TALES doctorate candidates will (i) leverage time-domain astronomy observations from state-of-the-art facilities to map the inner environments of supermassive black holes, (ii) use novel analysis methods from the discipline of data science to maximise the information gain from the observations and (iii) develop new theories and models to interpret the data and learn about the physics of the life-cycle of black holes at the centres of galaxies. Parallel to the core research activities above, TALES aspires to implement an ambitious training programme on both technical and complementary skills that is tailored to the needs of the doctorate candidates and includes secondments to industrial and/or academic partners as well as specialised lectures and science communication events. 

The Specific Doctoral Project:

It is currently thought that most massive galaxies in the Universe host in their nuclear regions black holes that are million or even billion times more massive than our Sun. These exotic astrophysical objects are thought to grow their masses over long periods of time by swallowing gaseous matter from their immediate environments. During this process an accretion disk is formed that funnels the material onto the black hole, thereby feeding it and increasing its mass. The infall of matter onto the compact object via the accretion disk is also accompanied by the release of huge amounts of energy that can be observed at various parts of the electromagnetic spectrum with characteristic signatures that define the population of Active Galactic Nuclei (AGN).

Understanding in detail the physics of the accretion process onto supermassive black holes remains a major challenge of current astrophysical research and one of the central objectives of the TALES Doctorate Network. Recently, it has been realised that temporal information may hold the key for understanding the inner structure and physics of accretion flows. This is based on the fact that the accretion process is by nature highly dynamic, i.e. ever changing with time, which observationally translates to a “flickering” of the emitted flux at any wavelength, i.e. continuous variations with time around a mean value. By studying the variability timescales of AGN at different wavelengths we learn about the geometry of the different energy emitting components of the accretion flow (e.g. accretion disk, warm and hot X-ray corona, outflows). Moreover, the simultaneous modelling of the variability amplitudes at different wavebands and timescales provides physical information on the dynamics of the accretion flow and the interplay between its different components.   

This project will use the multi-phase accretion model for innermost region of AGN, where cold gas in the disk interacts radiatively with hot corona. Moreover, the warm ionized layer is self consistently created on the top of the colder disk via additional magnetic dissipation. The goal of the project is to include dynamical behavior of the gas affected by strong radiative field and radiation cooling rate. We already know that timescales for radiative cooling of the hot phase are fast, therefore dynamical timescales should be estimated and compared to observations. All timescales derived from theoretical modelling will be compared with state of art observationsof of AGN populations at X-ray, ultraviolet and optical wavelengths as a function of the mass of the black hole and the Eddington ratio of the accretion flow. Observations will be reduced and statistically analyzed within the TALES Doctoral Network. The physically motivated multi-phase accretion model will be an input to reverberation mapping simulations available to the TALES consortium or by constructing semi-empirical models that link the X-ray with the UV/optical variability. 

The doctoral candidate will be based at the Nicolaus Copernicus Astronomical Center (NCAC PAS), a leading institute of the GeoPlanet Doctoral School, which offers the opportunity to carry out graduate studies leading to a PhD degree in astronomy. The project will be supervised by Prof. Agata Różańska. The doctoral candidate will enrol at the PhD program of GeoPlanet Doctoral School, which offers the specific courses, lectures (including interdisciplinary lectures), seminars, as well as the full process of thesis preparation. Foreseen secondments include AALTA Lab, Slovenia, University of Belgrad, NUCLIO, Portugal, SRON, Netherland, and industrial partners of the TALES Doctorate Network. 

 

 

Where to apply

E-mail
agata@camk.edu.pl

Requirements

Research Field
Astronomy » Astrophysics
Education Level
Master Degree or equivalent
Research Field
Mathematics
Education Level
Master Degree or equivalent
Research Field
Physics
Education Level
Master Degree or equivalent
Skills/Qualifications
  • Master of Sciences in physics or mathematics (to be completed by the start date)
  • Proficiency in English, both written and spoken
  • Solid computational background
  • Strong writing and communication skills compatible with an entry-level research position.
  • Ability to work independently and take initiative
  • Effective teamwork skills and collaborative mindset
Specific Requirements

The successful candidate will engage in a rigorous PhD program that involves a demanding travel schedule, including mandatory secondments with both industrial and academic partners. Participation in a variety of training sessions, dissemination activities, and outreach events will also be required. Given the nature of the program, the ability to adapt quickly to new environments and a willingness to travel frequently are essential.

Level
Excellent

Additional Information

Benefits

The successful candidate will be offered a 48-month scholarship contract which includes insurance and pension scheme with a very competitive annual salary (36 paid by MSCA, and 12 by NCAC PAS). Additional allowances may be available based on family circumstances, in accordance with the MSCA provisions.

The recruited researcher will have the opportunity to work within an international and multidisciplinary team that includes 11 doctoral candidates spread in 10 universities across Europe, a total of 14 astrophysics research groups and 8 industrial partners that are active in the fields of data science or education. 

As part of the TALES Doctorate Researcher program, the candidate will benefit from a wide range of professional and personal development opportunities through targeted training events. They will acquire a unique skill set that bridges astrophysical modeling, astronomical observations, and data science, positioning them at the forefront of interdisciplinary research in these fields.

Eligibility criteria

The following conditions apply to the offered position:

Applicants must be Doctoral Candidates, i.e., not already in possession of a doctoral degree at the date of the recruitment. Researchers who have successfully defended their doctoral thesis but who have not yet formally been awarded the doctoral degree will not be considered eligible.

Trans-national mobility: The applicant — at the date of recruitment — should not have resided in the country where the research training takes place for more than 12 months in the 3 years immediately prior to recruitment, and not have carried out their main activity (work, studies, etc.) in that country. For refugees under the Geneva Convention (1951 Refugee Convention and the 1967 Protocol), the refugee procedure (i.e. before refugee status is conferred) will not be counted as ‘period of residence/activity in the country of the beneficiary’. 

Selection process

For the application, candidates should provide their complete application documents including:

  1. The application for admission to the doctoral school together with GDPR statement (following the templates available for download in the online application form; address given below).
  2. A copy of their master’s/university and bachelor’s degree diplomas. In case master’s degree diploma is not yet available, it must be provided before the candidate is admitted to the school.
  3. A transcript of grades (Bachelor and Master Courses).
  4. A Curriculum Vitae including an education and employment records, list of publications, information on involvement in scientific activities – membership in scientific groups/societies, participation in scientific conferences, internships and training, awards and distinctions.
  5. A letter of motivation containing a short description of the candidate's interests and scientific achievements, and justification of the intention to undertake education at the Doctoral School.
  6. English language certificate(s), if available.

All documents should be in the PDF format, including scans, and should be submitted via an electronic system available at: https://geoplanetschool.erk24.pl/erk/index.php.
The application deadline is March 1st, 2025. In addition to application documents given above, at least one recommendation letter should be sent directly by the referee to: phdstudies@camk.edu.pl, before the application deadline (March 1st). 

Following the initial screening of the applications, a short list of up to 5 candidates will be invited to interviews that will consist of a 15 minutes oral presentation by the applicants on their research experience and up to 45 minutes of questions and general discussion.

Questions about the position can be sent to: prof. Agata Różańska (agata@camk.edu.pl).

Complete information on recruitment to the GeoPlanet Doctoral School can be found at NCAC website: https://www.camk.edu.pl/en/archiwum/2025/01/30/recruitment-20252026/. For additional information contact the coordinator of the doctoral school, Dr. Radosław Smolec (smolec@camk.edu.pl).

The selection process will adhere to the code of conduct for the recruitment of researchers

Additional comments

The Nicolaus Copernicus Astronomical Center (NCAC PAS), a leading institute of the GeoPlanet Doctoral School. The PhD studies are related to subjects pursued at CAMK PAN including observational and theoretical astrophysics as well as cosmology.

Our senior scientists participate in the H.E.S.S., CTA, Hyper-Kamiokande, GADMC, DarkSide, LUMI-Q, and VIRGO/LIGO/Kagra, ET and EGO projects and are involved in instrumental projects concerning the astronomical satellites eROSITA, ARCUS and ATHENA. NCAC PAS represents the Polish astronomical community in the SALT consortium which operates an 11-m optical telescope in South Africa. The Center's scientists are leading participants in the Polish scientific satellite project, BRITE, dedicated to precise stellar brightness measurements, and in the project ARAUCARIA, dedicated to the calibration of the cosmological distance scale. They also operate Cerro Murphy Observatory in Chile and SOLARIS – a network of southern hemisphere small robotic telescopes committed to stellar astronomy, the search for exoplanets, and quantum satellite communication.

All seminars and lectures are in English. Students based in Warsaw may apply for accommodation in the student house run by our Center.

Work Location(s)

Number of offers available
1
Company/Institute
CAMK PAN
Country
Poland
City
Warsaw
Postal Code
00-716
Street
Bartycka 18
Geofield

Contact

City
Warsaw
Website
Street
Bartycka 18
Postal Code
00-716
E-Mail
agata@camk.edu.pl

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