Project information
Stars in galactic nuclei: interrelation with massive black holes
- Project Identification
- GM24-10599M
- Project Period
- 1/2024 - 12/2028
- Investor / Pogramme / Project type
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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.
Publications
Total number of publications: 8
2024
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A case for a binary black hole system revealed via quasi-periodic outflows
Science Advances, year: 2024, volume: 10, edition: 13, DOI
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Alive but Barely Kicking: News from 3+ yr of Swift and XMM-Newton X-Ray Monitoring of Quasiperiodic Eruptions from eRO-QPE1
Astrophysical Journal Letters, year: 2024, volume: 963, edition: 2, DOI
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Candidate young stellar objects in the S-cluster: Kinematic analysis of a subpopulation of the low-mass G objects close to Sgr A
Astronomy and Astrophysics, year: 2024, volume: 686, edition: June 2024, DOI
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Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from Mg II and C IV reverberation-mapped quasar data
Monthly Notices of the Royal Astronomical Society, year: 2024, volume: 528, edition: 4, DOI
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Lense–Thirring precession after a supermassive black hole disrupts a star
Nature, year: 2024, volume: 630, edition: 8016, DOI
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Repeating nuclear transients as candidate electromagnetic counterparts of LISA extreme mass ratio inspirals
Monthly Notices of the Royal Astronomical Society, year: 2024, volume: 532, edition: 2, DOI
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Science with a Small Two-Band UV-Photometry Mission III: Active Galactic Nuclei and Nuclear Transients
Space Science Reviews, year: 2024, volume: 220, edition: 3, DOI
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X-ray eruptions every 22 days from the nucleus of a nearby galaxy
Nature Astronomy, year: 2024, volume: 8, edition: 3, DOI