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Project information
Stars in galactic nuclei: interrelation with massive black holes

Information

This project doesn't include Faculty of Economics and Administration. It includes Faculty of Science. Official project website can be found on muni.cz.
Project Identification
GM24-10599M
Project Period
1/2024 - 12/2028
Investor / Pogramme / Project type
Czech Science Foundation
  • JUNIOR STAR
MU Faculty or unit
Faculty of Science

Cílem projektu je studium vzájemné interakce mezi hvězdami a supermasivními černými dírami (SCD) v galaktických jádrech. Již dříve jsme ukázali, že interakce s nukleárním jetem může podstatně ovlivnit vlastnosti hvězd. Zde navrhujeme rozšířit předchozí studie systematickou analýzou kombinované interakce hvězd s akrečním diskem i jetem. Opakovaná setkání zvýší ztrátu hvězdné hmoty, a tudíž kromě modifikace hvězdného vývoje nevyhnutelně změní i stav akrece SCD. Tradiční unifikované modely aktivních galaktických jader (AGJ) vliv hvězd zanedbávají. Ty však mohou nejen ovlivňovat akreční stav SCD, ale nakonec jej také určovat prostřednictvím hustých koncentrací - jaderných hvězdokup (JH). K pochopení souvislosti mezi modulací akrečního stavu SCD ze strany JH a zpětnou vazbou AGJ na velkých škálách je zapotřebí porovnat vlastnosti JH, charakteristiky rádiové emise na menších a větších škálách, jakož i vlastnosti rentgenové emise v rámci Bondiho poloměru SCD.

The goal of the project is to study the mutual interaction between stars and supermassive black holes (SBHs) in galactic nuclei. Previously, we showed that the interaction with the nuclear jet can substantially affect stellar characteristics. Here we propose to extend previous studies by analyzing systematically the combined interaction of stars with both the accretion disk and the jet. Repetitive encounters will enhance stellar mass loss and hence, in addition to modifying stellar evolution, they inevitably change the accretion state of the SBH. Traditional unified models of active galactic nuclei (AGN) neglect the effect of stars. However, they can not only perturb the accretion state of SBHs, but eventually also determine it via dense concentrations – nuclear star clusters (NSCs). Comparison of the NSC properties, radio emission characteristics on smaller and larger scales as well as X-ray emission properties within the Bondi radius of the SBH are needed to comprehend the link between the NSC modulation of the SMBH accretion state and large-scale AGN feedback.

Sustainable Development Goals

Masaryk University is committed to the UN Sustainable Development Goals, which aim to improve the conditions and quality of life on our planet by 2030.

Sustainable Development Goal No. 4 – Quality education Sustainable Development Goal No. 5 – Gender equality Sustainable Development Goal No. 8 – Decent work and economic growth Sustainable Development Goal No. 9 – Industry, innovation and infrastructure Sustainable Development Goal No. 10 – Reduced inequalities Sustainable Development Goal No. 16 – Peace, justice and strong institutions Sustainable Development Goal No. 17 – Partnerships for the goals

Publications

Total number of publications: 9

2024

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