On the Star Formation Efficiencies and Evolution of Multiple Stellar Generations in Globular Clusters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00519295" target="_blank" >RIV/67985815:_____/19:00519295 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-4357/ab2455" target="_blank" >https://doi.org/10.3847/1538-4357/ab2455</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ab2455" target="_blank" >10.3847/1538-4357/ab2455</a>
Alternative languages
Result language
angličtina
Original language name
On the Star Formation Efficiencies and Evolution of Multiple Stellar Generations in Globular Clusters
Original language description
By adopting empirical estimates of the helium enhancement (AY) between consecutive stellar generations for a sample of Galactic globular clusters (GGCs), we uniquely constraint the star formation efficiency (epsilon) of each stellar generation in these stellar systems. In our approach, the star formation efficiency (epsilon) is the central factor that links stellar generations as it defines both their stellar mass and the remaining mass available for further star formation, fixing also the amount of matter required to contaminate the next stellar generation. In this way, epsilon is here shown to be fully defined by the He enhancement between successive stellar generations in a GC. Our approach also has an impact on the evolution of clusters and thus considers the possible loss of stars through evaporation, tidal interactions and stellar evolution. We focus on the present mass ratio between consecutive stellar generations (M(j-1)G/M((j))G) and the present total mass of GGCs (M-GC). Such considerations suffice to determine the relative proportion of stars of consecutive generations that remain today in globular clusters (alpha((j-1)G)/alpha((j))G). The latter is also shown to directly depend on the values of Delta Y and thus the He enhancement between consecutive stellar generations in GGC places major constraints on models of star formation and evolution of GC.
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
<a href="/en/project/GA19-15008S" target="_blank" >GA19-15008S: Star formation efficiency in massive star clusters</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
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
1538-4357
e-ISSN
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Volume of the periodical
879
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
58
UT code for WoS article
000474384700003
EID of the result in the Scopus database
2-s2.0-85069521903