确定球状星团中心恒星集中程度的问题

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astrophysical Bulletin Pub Date : 2024-05-08 DOI:10.1134/s1990341324600078

S. J. Turaev, S. N. Nuritdinov, A. S. Rastorguev, I. U. Tadjibaev

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引用次数: 0

摘要

摘要本文分析了Gaia DR2提供的81个球状星团的视表面密度观测数据。文中讨论了分析这些观测数据的问题，以及它们与利用 HST 获得的类似数据之间的差异。根据对观测数据质量的分析结果和一些物理方面的考虑，我们将球状星团分为三类，然后考虑视表面密度随距离变化的建模问题。模型的自由参数值是通过交点最小化方法求得的。通过我们提出的 4 参数广义模型，首次找到了包括浓度参数在内的自由参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Problems of Determining the Degree of Star Concentration Towards the Center of Globular Clusters

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Problems of Determining the Degree of Star Concentration Towards the Center of Globular Clusters

Abstract

In this paper, we analyze the apparent surface density observations of 81 globular clusters provided by Gaia DR2. The problems of analyzing these observations and their differences from similar data obtained using the HST are discussed. Based on the results of this analysis of the quality of observational data and a number of physical considerations, we separate globular clusters into three classes and then consider the issues of modeling the apparent surface density versus distance. The values of the free parameters of the model are found by the symplectic minimization method. The free parameters including the concentration parameter are for the first time found using the 4-parameter generalized model we propose.

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来源期刊

Astrophysical Bulletin 地学天文-天文与天体物理

CiteScore

2.00

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： Astrophysical Bulletin is an international peer reviewed journal that publishes the results of original research in various areas of modern astronomy and astrophysics, including observational and theoretical astrophysics, physics of the Sun, radio astronomy, stellar astronomy, extragalactic astronomy, cosmology, and astronomy methods and instrumentation.