Fractal Effects of the Stellar Medium in the Vicinity of the Sun According to Gaia DR2 Data

IF 1.3 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
M. L. Ostashova, A. S. Rastorguev
{"title":"Fractal Effects of the Stellar Medium in the Vicinity of the Sun According to Gaia DR2 Data","authors":"M. L. Ostashova,&nbsp;A. S. Rastorguev","doi":"10.1134/S1990341324600601","DOIUrl":null,"url":null,"abstract":"<p>In this paper, we study the fractal properties of the stellar medium in the solar vicinity based on the Gaia DR2 data for 200 000 stars of all spectral types at distances from 1 to 100 pc from the Sun. We consider the main stages of the development of ideas about the fractal structure in the stellar medium of galaxies. Analysis of the spatial distribution of stars is performed using by the ‘‘mass–radius’’ method. Numerical calculations show that the mean conditional local stellar density in spheres with the increasing radius <span>\\(r\\)</span> with the center in the <span>\\(i\\)</span>-th star is approximated by power laws, which confirms the de Vaucouleurs–Mandelbrot conclusions for fractal structures in gravitating media and indicates the presence of fractal structures in the stellar medium in the solar neighborhood with the fractal dimension <span>\\(D\\simeq 2.41\\)</span>. The characteristics of the fractal properties of the medium, determined from a sample of 200 000 stars, are discussed and compared with an earlier result obtained for 13 000 F and G dwarfs in the solar neighborhood according to the Geneva–Copenhagen survey.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"79 3","pages":"504 - 507"},"PeriodicalIF":1.3000,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astrophysical Bulletin","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1990341324600601","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0

Abstract

In this paper, we study the fractal properties of the stellar medium in the solar vicinity based on the Gaia DR2 data for 200 000 stars of all spectral types at distances from 1 to 100 pc from the Sun. We consider the main stages of the development of ideas about the fractal structure in the stellar medium of galaxies. Analysis of the spatial distribution of stars is performed using by the ‘‘mass–radius’’ method. Numerical calculations show that the mean conditional local stellar density in spheres with the increasing radius \(r\) with the center in the \(i\)-th star is approximated by power laws, which confirms the de Vaucouleurs–Mandelbrot conclusions for fractal structures in gravitating media and indicates the presence of fractal structures in the stellar medium in the solar neighborhood with the fractal dimension \(D\simeq 2.41\). The characteristics of the fractal properties of the medium, determined from a sample of 200 000 stars, are discussed and compared with an earlier result obtained for 13 000 F and G dwarfs in the solar neighborhood according to the Geneva–Copenhagen survey.

Abstract Image

盖亚 DR2 数据显示的太阳附近恒星介质的分形效应
在本文中,我们根据盖亚 DR2 数据研究了太阳附近恒星介质的分形特性,这些数据包含了距离太阳 1 到 100 pc 范围内所有光谱类型的 20 万颗恒星。我们考虑了星系恒星介质分形结构观点发展的主要阶段。采用 "质量-半径 "法对恒星的空间分布进行了分析。数值计算表明,以第(i\)颗恒星为中心,半径\(r\)不断增大的球体中的平均条件局部恒星密度近似于幂律,这证实了de Vaucouleurs-Mandelbrot关于引力介质中分形结构的结论,并表明太阳邻域的恒星介质中存在分形结构,其分形维度为\(D\simeq 2.41\)。讨论了从200,000颗恒星样本中确定的介质分形特性的特征,并将其与早先根据日内瓦-哥本哈根测量对太阳邻域的13,000颗F矮星和G矮星得出的结果进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Astrophysical Bulletin
Astrophysical Bulletin 地学天文-天文与天体物理
CiteScore
2.00
自引率
33.30%
发文量
31
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.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信