Analysis of Observational Data of Globular Clusters within the Framework of Gaia Dr2

Sobir Jurakobilovich Turaev; Salakhutdin Nasritdinovich Nuritdinov; Alexey Sergeevich Rastorguev; Davron Abduvali ugli Rashidov

doi:10.20944/preprints202308.1299.v1

Preprint Communication Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 11 August 2023 / Approved: 18 August 2023 / Online: 18 August 2023 (10:18:22 CEST)

This article is a logical continuation of the work of Nuritdinov et al. (2021). We analyzed space observations of the apparent surface density of 81 globular clusters (GCs) observed by GAIA DR2 and published in de Boer et al (2019). First, we studied the features of the quality of the GC surface density data, including comparing them with the HST data. Using our 3-parameter model, previously tested on the example of HST space observations, we found the values of the stellar concentration parameter towards the center of the cluster. As a result, we found good correlations of this parameter with the physical characteristics of the GCs. We have also found the corresponding empirical formulas for this parameter.

apparent surface density; concentration parameter; GAIA DR2; globular clusters; HST; space observations

Physical Sciences, Astronomy and Astrophysics

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Analysis of Observational Data of Globular Clusters within the Framework of Gaia Dr2

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