Dynamics of star associations in an SMBH-IMBH system: The case of IRS13 in the Galactic centre

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00603209" target="_blank" >RIV/67985815:_____/24:00603209 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0361024" target="_blank" >https://hdl.handle.net/11104/0361024</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202452050" target="_blank" >10.1051/0004-6361/202452050</a>

Result language
angličtina
Original language name
Dynamics of star associations in an SMBH-IMBH system: The case of IRS13 in the Galactic centre
Original language description
Context. The existence of intermediate-mass black holes (IMBHs) still poses challenges to theoretical and observational astronomers. Several candidates have been proposed, including the one in the IRS13 cluster in the Galactic centre, where the evidence is based on the velocity dispersion of its members, however, none have been confirmed to date. Aims. We aim to gain insights into the presence of an IMBH in the Galactic centre through a numerical study of the dynamical interplay between an IMBH and star clusters (SCs) in the vicinity of a supermassive black hole (SMBH). Methods. We used high-precision N-body models of IRS13-like SCs in the Galactic centre, and of more massive SCs that fall into the centre of the Galaxy from larger distances. Results. We find that at IRS13's physical distance of 0.4 pc, an IRS13-sized SC cannot remain gravitationally bound even if it contains an IMBH of thousands of M circle dot. Thus, IRS13 appears to be an incidental present-day clumping of stars. Furthermore, we show that the velocity dispersion of tidally disrupted SCs (the likely origin of IRS13) can be fully accounted for by the tidal forces of the central SMBH, the IMBH's influence is not essential.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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