Discovery of a dense association of stars in the vicinity of the supermassive black hole Sgr A*
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00601312" target="_blank" >RIV/67985815:_____/24:00601312 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/24:00137612
Result on the web
<a href="https://hdl.handle.net/11104/0358549" target="_blank" >https://hdl.handle.net/11104/0358549</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ad7d06" target="_blank" >10.3847/1538-4357/ad7d06</a>
Alternative languages
Result language
angličtina
Original language name
Discovery of a dense association of stars in the vicinity of the supermassive black hole Sgr A*
Original language description
We focus on a sample of 42 sources in the vicinity of the bow-shock source IRS 1W (N-source region), located at a distance of 6.'' 05 northeast of the supermassive black hole Sagittarius A* (Sgr A*), within the radius of 1.'' 35. We present the first proper-motion measurements of N sources and find that a larger subset of N sources (28 sources) exhibit a north-west (NW) flying angle. These sources can be bound by an intermediate-mass black hole (IMBH) or the concentration that we observe is due to a disk-like distribution projection along the line of sight. We detect the N sources in the H, K (s) , and L ' bands. The NW-ward flying sources could be a bound collection of stars. We discuss the tentative existence of an IMBH or an inclined disk distribution to explain the significant overdensity of stars. The first scenario of having an IMBH implies the lower limit of similar to 10(4) M (circle dot) for the putative IMBH. Our measurements for the first time reveal that the dense association of stars containing IRS 1W is a comoving group of massive, young stars. This stellar association might be the remnant core of a massive stellar cluster that is currently being tidally stripped as it inspirals toward Sgr A*. The second scenario suggests that the appearance of the N sources might be influenced by the projection of a disk-like distribution of younger He-stars and/or dust-enshrouded stars.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
1538-4357
Volume of the periodical
975
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
15
Pages from-to
261
UT code for WoS article
001350934500001
EID of the result in the Scopus database
2-s2.0-85209369338