Ananda Deepika Bollimpalli

Thesis title: Temporal Variability Processes in Discs and Shells around Compact Objects

Supervisor: Włodzimierz Kluźniak

Year of defence: 2020

Krystian Iłkiewicz

Thesis title: Badanie populacji akreujących białych karłów

Supervisor: Joanna Mikołajewska

Year of defence: 2020

Magdalena Sieniawska

Thesis title: Rotating neutron stars: dense -matter interiors and gravitational-wave searches using time-domain F-statiscic methods

Supervisor: Michał Bejger

Year of defence: 2020

Maitrayee Gupta

(Institute for Research in Astrophysics and Planetology, France)

Maitrayee Gupta received her master’s of science in Cosmology from the University of Sussex in the United Kingdom. As part of that research, she studied the clustering properties of galaxies and the correlation between galaxy types and their mass, colour, and UV properties. She then joined the Nicolaus Copernicus Astronomical Centre to pursue a Ph.D. under Dr. Marek Sikora. The main objective of her thesis was to study differences between radiative properties of the accretion flows in Radio Loud (RL) and Radio Quiet (RQ) AGN and their relation to jet production efficiency, for which she received the Preludium Grant. She also received the NAWA Iwanovska Grant to research the variability of RL quasars at the Harvard Smithsonian Center for Astrophysics in MA, USA and a fellowship from the Harvard Smithsonian Center for Astrophysics to continue her research there with Dr. Aneta Siemiginowska after defending her thesis. She most recently moved to Toulouse, France where she is affiliated with the Institute for Research in Astrophysics and Planetology (IRAP) under CNRS, and CNES. There, she works as a postdoc developing EXODUS, a software tool for detecting faint rapid transients in XMM-Newton data that may not have been detected automatically using the XMM-Newton pipeline. While in France, she has also studied variability properties and black-hole masses of low-luminosity AGN. Her research interests include high-energy astrophysics, active galactic nuclei (AGN) and their host galaxies, and X-ray astronomy.

Thesis title: Comparison of AGN properties in luminous radio galaxies to their radio-quiet counterparts

Supervisor: Marek Sikora

Year of defence: 2021

Vadym Khomenko

Thesis title: Superfluid Neutron Star Dynamics

Supervisor: Brynmor Haskell

Year of defence: 2021

Samaresh Mondal

(Brera Astronomical Observatory, INAF, Merate, Italy)

Thesis title: Probing the nature of super-Eddington accretion in ultraluminous X-ray sources

Supervisor: Agata Różańska

Year of defence: 2021

Henryka Netzel

(Konkoly Observatory, Hungary)

Thesis title: Badanie gwiazd klasycznego pasa niestabilności metodami asterosejsmologii

Supervisor: Radosław Smolec

Year of defence: 2021

David Abarca

David Abarca grew up in the city of Centralia in Washington State in the USA. He received a Bachelor of Arts degree in Physics and Astrophysics at Harvard University. It was there that he developed an interest in numerical simulations after writing his senior thesis under the advisement of Prof. Ramesh Narayan and Dr. Aleksander Sądowski (another CAMK alumnus). After graduating, David spent another year at the Harvard-Smithsonian Center for Astrophysics continuing to work on research projects with Prof. Narayan and Dr. Sądowski. Through his close collaboration with Dr. Sądowski, he was persuaded to apply to the PhD program at CAMK. He was accepted under the supervision of Prof. Włodek Kluźniak. His main focus during the PhD was adapting the radiative hydrodynamic code, KORAL, to be able to simulate accretion disks around magnetized neutron stars. He also worked on the team who discovered Puffy Disks, involving close collaboration with the radiative astrophysics group at the Silesian University in Opava, Czech Republic. Ultimately, he elected not to pursue astronomy as a career, and instead decided to use his technical and analytical skills to transition into finance. He currently works at ING Hubs Poland in market risk management by validating models related to interest rate risk in the banking book.

Thesis title: Numerical simulations of accretion onto neutron stars

Supervisor: Włodzimierz Kluźniak

Year of defence: 2022

Zijia Cui

Thesis title: Disk-Planet Interactions: Formation of Mean-motion Resonances in a Gaseous Protoplanetary Disk

Supervisor: Ewa Szuszkiewicz

Year of defence: 2022

Marta Dziełak

Thesis title: Constraining the geometry of the accretion flow in black hole X-ray binaries

Supervisor: Andrzej Zdziarski, Barbara De Marco

Year of defence: 2022

Lorenzo Gavassino

Thesis title: Thermodynamic methods for relativistic hydrodynamics

Supervisor: Brynmor Haskell

Year of defence: 2022

Filip Morawski

Thesis title: Applications of machine learning methods in gravitational-wave detectors data analysis

Supervisor: Michał Bejger, Elena Cuoco

Year of defence: 2022

José Ortuño-Macías

Thesis title: Kinetic Numerical Simulations of Particle Acceleration Mechanisms in Relativistically Magnetized Jets

Supervisor: Krzysztof Nalewajko

Year of defence: 2022

Katarzyna Rusinek-Abarca

(Institute of Philosophy and Sociology, Polish Academy of Sciences, Warsaw)

Katarzyna studied astronomy at the Nicolaus Copernicus University in Toruń, Poland, obtaining her BSc and MSc degrees for work focused on the radio morphologies of radio-loud active galactic nuclei (AGNs). Particularly interesting cases of her research were giant radio sources and radio galaxies with recurrent activity. In 2016 she moved to Warsaw where, under the supervision of Prof. Marek Sikora, she investigated the jet production efficiency in AGNs. This task incorporated thousands of galaxies for which a diverse radio dataset was collected, analyzed, and synthesized, resulting in a few well defined samples of galaxies. These studies confirmed the already known yet often questioned in the literature bimodal distribution of radio loudness, and supported the existence of certain threshold(s) condition(s) for the production of the strongest jets. Currently, and since 2020, she has been working as the Research Promoter at the Centre for the History of Renaissance Knowledge at the Institute of Philosophy and Sociology PAN where her analytical skills and goal-oriented mind allow her to help build a more robust research environment.

Thesis title: Observational constraints on jet production efficiency in Active Galactic Nuclei

Supervisor: Marek Sikora

Year of defence: 2022

Marzena Śniegowska

(Tel Aviv University, Israel)

Marzena Śniegowska was born and grew up in Kruszwica, a small town in central Poland. She obtained his BSc. and  MSc in Astronomy at the Faculty of Physics University of Wasaw. She joined as a PhD student at CAMK in 2018. During her PhD studies she worked with Prof. Michał Chodorowski of CAMK PAN and Prof. Bożena Czerny of CFT (Center for Theoretical Physics) PAN on time-dependent phenomena in active galactic nuclei, mostly radiation pressure driven thermal and viscous instabilities. Currently, Marzena is working as a postdoc in Tel Aviv University.

Thesis title: Variability and evolution of Active Galactic Nuclei

Supervisor: Bożena Czerny, Michał Chodorowski

Year of defence: 2022

Ankan Sur

(Princeton University, USA)

Ankan Sur was born in Kolkata, West Bengal, India. He obtained his BSc degree in physics from the St. Xavier's College of the University of Calcutta, and an MSc degree in Physics and Astronomy at the University of Amsterdam, where he was an Amsterdam Excellence Scholar. During his masters' thesis, he worked as part of the LIGO Virgo Collaboration on the statistical measurement of the Hubble constant. He joined CAMK to work on neutron star magnetic fields and on gravitational-wave mountains under the supervision of Dr. Brynmor Haskell. He was awarded the President's Scholarship of the Polish Academy of Sciences in 2021, and was also a predoc at the Flatiron Institute in New York. Following his completion of PhD, Ankan joined Princeton University in the US for his postdoctoral work.

Thesis title: Magnetic fields in isolated neutron stars: from the interior to the exterior

Supervisor: Brynmor Haskell

Year of defence: 2022

Piotr Wielgórski

(Nicolaus Copernicus Astronomical Center)

Thesis title: Cefeidy klasyczne i II typu jako kosmiczne wskaźniki odległości

Supervisor: Grzegorz Pietrzyński

Year of defence: 2022

Bartłomiej Zgirski

(Nicolaus Copernicus Astronomical Center)

Thesis title: Selected Methods of Precision Distance Determinations to Nearby Galaxies

Supervisor: Grzegorz Pietrzyński

Year of defence: 2022

Mohammad Hassan Naddaf

Thesis title: Simulation of the dynamics and geometry of broad line region in active galactic nuclei

Supervisor: Bożena Czerny

Year of defence: 2023

Saikruba Krishnan

Thesis title: Time-Domain and Spectroscopic studies of Active Galactic Nuclei.

Supervisor: Alex Markowitz

Year of defence: 2023

Agostino Leveque

Thesis title: Extra Galactic Globular Cluster machinery based on MOCCA code for Star Cluster simulations.

Supervisor: Mirosław Giersz

Year of defence: 2023

Aleksandra Olejak

Thesis title: The origin of binary black hole mergers

Supervisor: Tomasz Bulik

Year of defence: 2023

Chandra Shekhar Saraf

(Korean Astronomy and Space Science Institute (KASI), South Korea)

Chandra Shekhar Saraf was born in Sitamarhi, Bihar, India. He obtained his B.Sc. Honors degree in physics from The Maharaja Sayajirao University of Baroda, and M.Sc. degree in physics from the Savitribai Phule Pune University (formerly University of Pune). For his masters' thesis, he worked at the National Center for Radio Astrophysics in Pune, India on the topic of Lyman alpha radiative transfer to study the reionization period in the evolution of the Universe. He was awarded the V. Subramaniam prize by the Indian National Science Academy for his performance during masters degree. He joined CAMK in 2018 to work on testing cosmological models with cross-correlation between Cosmic Microwave Background lensing and galaxy surveys under the supervision of dr hab. Pawel Bielewicz and dr hab. Michal Chodorowski. His studies was an attempt towards resolving the tensions in modern cosmology like the S_8 tension. After the completion of PhD, Chandra Shekhar joined the Korean Astronomy and Space Science Institute (KASI) in South Korea for his postdoctoral work.

Thesis title: Studying tomographic cross-correlations between CMB gravitational lensing potential and galaxy surveys

Supervisor: Paweł Bielewicz & Michał Chodorowski

Year of defence: 2023

Lami Suleiman

Thesis title: Dense matter properties and neutron star modelling

Supervisor: Julian Zdunik, Micaela Oertel

Year of defence: 2023

Paulina Sowicka

Thesis title: Excitation of pulsation in hot pre-white dwarf stars from an observational point of view

Supervisor: Gerald Handler, David Jones

Year of defence: 2024


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