Very massive stars in not so massive clusters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10388466" target="_blank" >RIV/00216208:11320/18:10388466 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/sty2245" target="_blank" >https://doi.org/10.1093/mnras/sty2245</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/sty2245" target="_blank" >10.1093/mnras/sty2245</a>
Alternative languages
Result language
angličtina
Original language name
Very massive stars in not so massive clusters
Original language description
Very young star clusters in the Milky Way exhibit a well-defined relation between their maximum stellar mass, m(max), and their mass in stars, M-ecl. A recent study shows that the young intermediate-mass star cluster VVV CL041 possibly hosts a greater than or similar to 80M(circle dot) star, WR62-2, which appears to violate the existence of the m(max)-M-ecl relation since the mass of the star is almost two times higher than that expected from the relation. By performing direct N-body calculations with the same mass as the cluster VVV CL041 (approximate to 3000M(circle dot)), we study whether such a very massive star can be formed via dynamically induced stellar collisions in a binaryrich star cluster that initially follows the m(max)-M-ecl relation. Eight out of 100 clusters form a star more massive than 80M(circle dot) through multiple stellar collisions. This suggests that the VVV CL041 cluster may have become an outlier of the relation because of its early-dynamical evolution, even if the cluster followed the relation at birth. We find that more than half of our model clusters host a merger product as its most massive member within the first 5 Myr of cluster evolution. Thus, the existence of stars more massive than the m(max)-M-ecl relation in some young clusters is expected due to dynamical processes despite the validity of the m(max)-M-ecl relation. We briefly discuss evolution of binary populations in our model.
Czech name
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Czech description
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Classification
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)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
481
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
153-163
UT code for WoS article
000449651400011
EID of the result in the Scopus database
2-s2.0-85054078164