The Utilization of Bayesian Framework in Determining Projected Spatial Distributions of Star Clusters

Star clusters are groups of stars that are bonded to each other by their gravitational forces. In general, star clusters are divided into the globular cluster and open cluster. There will always be some dynamic interactions in their lifetime, i.e. the process of relaxation and equipartition of inter...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-04, Vol.1523 (1), p.12008
Main Authors: Hidayat, Y A, Arifyanto, M I, Aprilia
Format: Article
Language:English
Subjects:
Density
Ellipticity
Galaxies
Globular clusters
Spatial distribution
Star clusters
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Summary:Star clusters are groups of stars that are bonded to each other by their gravitational forces. In general, star clusters are divided into the globular cluster and open cluster. There will always be some dynamic interactions in their lifetime, i.e. the process of relaxation and equipartition of interstellar encounter energy. The modeling is done by using King, Generalised King (GKing), Optimised Generalised King (OGKing), Elson Fall Freeman (EFF), Generalised Density Profile (GDP), and Restricted Generalised Density Profile (RGDP) profiles. Based on the Bayes factor, the results of a review of the density structure for star cluster Blanco 1 are dominated by King group profiles (King, GKing, and OGKing). Ellipticity values at the core radius (ϵrc and tidal radius (ϵrt obtained are 0.07−0.01+0.56 and 0.10−0.01+0.66, respectively. The estimation of the occurrence of mass segregation can be viewed from the value of κ. The κ valued obtained for Blanco 1 is 0.06−0.24+0.10 means that it undergo some mass segregation. The total mass obtained using the tidal force relationship of gravitational interactions with the potential Galaxy is 1623−364+273M⊙.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1523/1/012008