Degree of stochastic asymmetry in the tidal tails of star clusters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476056" target="_blank" >RIV/00216208:11320/23:10476056 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1i62wyqV0H" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1i62wyqV0H</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202244243" target="_blank" >10.1051/0004-6361/202244243</a>
Alternative languages
Result language
angličtina
Original language name
Degree of stochastic asymmetry in the tidal tails of star clusters
Original language description
Context. Tidal tails of star clusters are commonly understood to be populated symmetrically. Recently, the analysis of Gaia data revealed large asymmetries between the leading and trailing tidal tail arms of the four open star clusters Hyades, Praesepe, Coma Berenices, and NGC 752.Aims. As the evaporation of stars from star clusters into the tidal tails is a stochastic process, the degree of stochastic asymmetry is quantified in this work.Methods. For each star cluster, 1000 configurations of test particles were integrated in the combined potential of a Plummer sphere and the Galactic tidal field over the lifetime of the particular star cluster. For each of the four star clusters, the distribution function of the stochastic asymmetry was determined and compared with the observed asymmetry.Results. The probabilities for a stochastic origin of the observed asymmetry of the four star clusters are approximate to 1.7 sigma for Praesepe, approximate to 2.4 sigma for Coma Berenices, approximate to 6.7 sigma for Hyades, and approximate to 1.6 sigma for NGC 752.Conclusions. In the case of Praesepe, Coma Berenices, and NGC 752, the observed asymmetry can be interpreted as a stochastic evaporation event. However, for the formation of the asymmetric tidal tails of the Hyades, additional dynamical processes beyond a pure statistical evaporation effect are required.
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/GA20-21855S" target="_blank" >GA20-21855S: The dynamics of dense star clusters with primordial binaries and massive black holes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
1432-0746
Volume of the periodical
671
Issue of the periodical within the volume
březen
Country of publishing house
FR - FRANCE
Number of pages
9
Pages from-to
A88
UT code for WoS article
001001899500006
EID of the result in the Scopus database
2-s2.0-85149957421