Article about jets variability in ApJ

jet_profile_with_theta_allOur article on “Variability of magnetically-dominated jets from accreting black holes” is accepted to the Astrophysical Journal.

In this paper, Agnieszka Janiuk, Bestin James and Ishika Palit present the results of axisymmetric calculations of the structure and evolution of central engine, composed of magnetized torus around Kerr black hole that is launching a non-uniform jet. We probe the jet energetics at different points along the line of sight, and we measure the jet time variability as localized in these specific regions. We quantify our results by computing the minimum variability timescales and power density spectra.

The preprint of this article can be found here.

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Proposal to QUANTera submitted

We submitted a proposal for QUANTEra call 2021 – Applied Quantum Science (AQS).

The project is entitled “Fast detection of gravitational waves using quantum machine learning” and is led by our colleagues from Romania, Institute of Space Science/Cosmology and AstroParticle Physics, at Bucharest-Ilfov.


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Postdoc job opportunity in our group

We invite applications for post-doctoral position, financed from the Opus grant of prof. Agnieszka Janiuk.

We are looking for a candidate with a PhD and experience in theoretical and computational astrophysics. The topic of research involves study of stellar evolution and collapse in the context of long gamma ray bursts. We are also studying r-process nucleosynthesis in the outflows from accretion disks in GRB engines. The position will be available for initially two years, with a possible extension for the third year, subject to satisfactory performance.

The application deadline is set on 15 June.

All further details can be found under this link (see also attached documents in pdf format).


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Paper on collapsing stars accepted to ApJ

The article “Accretion induced black hole spin up revised by numerical GR MHD simulations”, by Dominika Krol and Agnieszka Janiuk, has been accepted for publication in the Astrophysical Journal. The paper presents constraints on the changing black hole mass and spin during accretion which enforces dynamical evolution of the Kerr space-time metric. Preprint may be found here under the link.





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RATOP 2021 conference

We have finished the first astrophysics conference at Center for Theoretical physics. The Relativistic Astrophysics – Theory and Observational Perspectives – namely RATOP, was held in 2021 from March 16 to March 19. The meeting had to be postponed from 2020, due to the pandemic situation, and finally was organized fully on-line. Nevertheless, the conference was a big success, and lot of participants enjoyed excellent talks on various topics of relativistic astrophysics.

The conference website is under this address.

Most of the lectures have been recorded and will be publicly available on-line.



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CFT Award for Ishika Palit

Ishika Palit, our 4th year PhD student, received the award of 10,000 PLN in the competition for a young researcher project. Her proposal  is entitled “Role of self gravity of accretion disk in collapsar model”.


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Professors nomination for Agnieszka Janiuk

Upon the decision of President of Poland, Mr. Andrzej Duda, dated on January 4th, 2021, dr hab. Agnieszka Janiuk received nomination for the full professor title in natural sciences.

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New member of the group arrived

A new member of our group has arrived in December 2020. Dr Fatemeh Hossein-Nouri is a specialist in numerical relativity and astrophysics of compact objects. She will hole the postdoctoral position in the CTP Astrophysics Group. The contract is financed from the new Opus grant by he National Science Center.

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Our project evaluated as outstanding

We have received the evaluation and acceptance of the final grant report. Project Sonata-Bis “Astrophysics of processes around compact objects”, led by prof. Agnieszka Janiuk in the years 2013-2018, has been evaluated by the NCN Experts as outstanding.


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12th X-IFU Consortium meeting

On November 2-6, the 12th X-IFU Consortium meeting was organized, in a virtual form on Zoom platform.  The Agenda of the meeting included 3 plenary sessions, with science talks related to high-energy astrophysics, plus reports on system engineering for the built X-IFU detector onboard the Athena Satellite. In parallel session, the XSAT (Science Advisory Team) XISC (Instrument Science Center) and XCAT (Calibration Team) had their meetings to present the activity reports.

More than 120 participants attended he meeting on-line sessions.

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