scholarly journals Photometric properties of stellar populations in Galactic globular clusters: the role of the Mg-Al anticorrelation

2013 ◽  
Vol 554 ◽  
pp. A19 ◽  
Author(s):  
S. Cassisi ◽  
A. Mucciarelli ◽  
A. Pietrinferni ◽  
M. Salaris ◽  
J. Ferguson
Keyword(s):  
Globular Clusters ◽  
Stellar Populations ◽  
Galactic Globular Clusters

Kinematical evolution of Globular Clusters

2019 ◽  
Vol 14 (S351) ◽  
pp. 524-527
Author(s):  
Maria A. Tiongco ◽  
Enrico Vesperini ◽  
Anna Lisa Varri
Keyword(s):  
Angular Momentum ◽  
Structural Properties ◽  
Globular Clusters ◽  
Velocity Dispersion ◽  
Three Dimensional ◽  
Stellar Populations ◽  
Velocity Space ◽  
Fundamental Understanding

AbstractWe present several results of the study of the evolution of globular clusters’ internal kinematics, as driven by two-body relaxation and the interplay between internal angular momentum and the external Galactic tidal field. Via a large suite of N-body simulations, we explored the three-dimensional velocity space of tidally perturbed clusters, by characterizing their degree of velocity dispersion anisotropy and their rotational properties. These studies have shown that a cluster’s kinematical properties contain distinct imprints of the cluster’s initial structural properties, dynamical history, and tidal environment. Building on this fundamental understanding, we then studied the dynamics of multiple stellar populations in globular clusters, with attention to the largely unexplored role of angular momentum.

scholarly journals Bayesian analysis of two stellar populations in Galactic globular clusters– III. Analysis of 30 clusters

2016 ◽  
Vol 463 (4) ◽  
pp. 3768-3782 ◽  
Author(s):  
R. Wagner-Kaiser ◽  
D. C. Stenning ◽  
A. Sarajedini ◽  
T. von Hippel ◽  
D. A. van Dyk ◽  
...  
Keyword(s):  
Bayesian Analysis ◽  
Globular Clusters ◽  
Stellar Populations ◽  
Galactic Globular Clusters

scholarly journals BAYESIAN ANALYSIS OF TWO STELLAR POPULATIONS IN GALACTIC GLOBULAR CLUSTERS. II. NGC 5024, NGC 5272, AND NGC 6352

2016 ◽  
Vol 826 (1) ◽  
pp. 42 ◽  
Author(s):  
R. Wagner-Kaiser ◽  
D. C. Stenning ◽  
E. Robinson ◽  
T. von Hippel ◽  
A. Sarajedini ◽  
...  
Keyword(s):  
Bayesian Analysis ◽  
Globular Clusters ◽  
Stellar Populations ◽  
Galactic Globular Clusters

Internal kinematics of multiple stellar populations in globular clusters

2019 ◽  
Vol 14 (S351) ◽  
pp. 324-328
Author(s):  
Mattia Libralato
Keyword(s):  
High Precision ◽  
Globular Clusters ◽  
Hubble Space Telescope ◽  
Stellar Populations ◽  
Stellar Systems ◽  
Proper Motions ◽  
Space Telescope ◽  
Formation And Evolution ◽  
Galactic Globular Clusters ◽  
Shed Light

AbstractSpectroscopy and photometry have revealed existence, complexity and properties of the multiple stellar populations (mPOPs) hosted in Galactic globular clusters. However, the conundrum of the formation and evolution of mPOPs is far from being completely exploited: the available pieces of information seem not enough to shed light on these topics. Astrometry, and in particular high-precision proper motions, can provide us the sought-after answers about how mPOPs formed and have evolved in these ancient stellar systems. In the following, I present a brief overview of the observational results on the internal kinematics of the mPOPs in some GCs thanks to Hubble Space Telescope high-precision proper motions.

Multiple Stellar Populations: the evolutionary framework

2012 ◽  
Vol 10 (H16) ◽  
pp. 245-246
Author(s):  
Santi Cassisi
Keyword(s):  
Globular Clusters ◽  
Stellar Populations ◽  
Stellar Model ◽  
Photometric Data ◽  
Stellar Systems ◽  
Huge Amount ◽  
Stellar Models ◽  
Galactic Globular Clusters ◽  
New Generation

AbstractIn these last years a huge amount of both spectroscopical and photometric data has provided a plain evidence of the fact that Galactic globular clusters (GCs) host various stellar sub-populations characterized by peculiar chemical patterns. The need of properly interpreting the various observational features observed in the Color-Magnitude Diagrams (CMDs) of these stellar systems requires a new generation of stellar models properly accounting for these chemical peculiarities both in the stellar model computations and in the color - Teff transformations. In this review we discuss the evolutionary framework that is mandatory in order to trace the various sub-populations in any given GC.

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