The fractions of post-binary-interaction stars and evolved blue straggler stars on the red giant branch of globular clusters

The fractions of post-binary-interaction stars and evolved blue straggler stars on the red giant branch of globular clusters
复制标题

双星相互作用后恒星和演化后的蓝离散星在球状星团红巨星分支上的比例

DOI:
10.1088/1674-4527/21/9/223
复制
发表时间:
2021-05
影响因子:
1.8
通讯作者:
Dengkai Jiang
Dengkai Jiang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
D;an Wei;Bo Wang;Hai-Liang Chen;H. F. Wang;Xiao-Bo Gong;Dongdong Liu;Dengkai Jiang

文献摘要

参考文献

相似文献

球状星团(GC)的红巨星分支(RGB)是一些奇异恒星的家园,这可能为球状星团中多个恒星群的形成提供线索。众所周知,双星相互作用是许多奇异恒星的形成原因。因此,了解 GC RGB 上的恒星比例是二元相互作用的结果非常重要。在本文中,我们进行了一项双星族合成研究,以追踪出现在 RGB 上的双星相互作用后 (post-BI) 恒星的数量,特别关注演化后的蓝离散星 (E-BSS)。假设初始二元分数接近 50%,我们发现 RGB 上大约一半的物体(称为巨人)经历了二元相互作用,并且在我们的标准模拟中,E-BSS 约占巨人的 10%。我们还比较了从不同渠道演变而来的后 BI 巨头的属性。我们发现初始轨道周期和质量比分布显着影响后 BI 巨星的比例。我们的结果表明,双星相互作用产生的非标准恒星对 GC 中的 RGB 恒星具有不可忽视的贡献,在未来研究多个恒星族群的起源时应考虑这一点。
The red giant branch (RGB) of globular clusters (GCs) is home to some exotic stars, which may provide clues on the formation of multiple stellar populations in GCs. It is well known that binary interactions are responsible for many exotic stars. Thus, it is important to understand what fraction of stars on the RGB of GCs is the result of binary interactions. In this paper, we performed a binary population synthesis study to track the number of post-binary-interaction (post-BI) stars that appear on the RGB, with particular emphasis on the evolved blue straggler stars (E-BSSs). Assuming an initial binary fraction of nearly 50%, we find that about half of the objects on the RGB (called giants) underwent the binary interactions, and that E-BSSs account for around 10% of the giants in our standard simulation. We also compare the properties of post-BI giants that evolved from different channels. We find that the initial orbital period and mass ratio distributions significantly affect the fraction of post-BI giants. Our results imply that the non-standard stars from binary interactions provide a non-negligible contribution to the RGB stars in GCs, which should be considered in future investigations of the origin of multiple stellar populations.
DOI: 10.3847/1538-4357/abb1b7
发表时间: 2020-08
期刊: The Astrophysical Journal
影响因子: --
作者:
W.-X. Sun;Y. Huang;H.-F. Wang;C. Wang;M. Zhang;X.-Y. Li;B.-Q. Chen;H.-W. Zhang;D.-D. Wei;D.-K. Jiang;X.-W. Liu
通讯作者: X.-W. Liu
DOI: 10.1046/j.1365-8711.2002.05752.x
发表时间: 2002-06
影响因子: 4.8
作者:
Zhanwen Han;P. Podsiadlowski;P. Maxted;T. Marsh;N. Ivanova
通讯作者: Zhanwen Han;P. Podsiadlowski;P. Maxted;T. Marsh;N. Ivanova
DOI: 10.1051/0004-6361/201118081
发表时间: 2011-09
影响因子: 6.5
作者:
D. Vanbeveren;N. Mennekens;J. Greve
通讯作者: D. Vanbeveren;N. Mennekens;J. Greve
从巨星到主序伴星的质量转移及其对长轨道周期蓝离散星的贡献
DOI: 10.1111/j.1365-2966.2008.13334.x
发表时间: 2008-04
影响因子: 4.8
作者:
Han, Zhanwen;Chen, Xuefei
通讯作者: Chen, Xuefei
DOI: 10.1086/324233
发表时间: 2001-12
期刊: The Astronomical Journal
影响因子: --
作者:
B. Carney;D. Latham;J. B. Laird;C. Grant;J. Morse
通讯作者: B. Carney;D. Latham;J. B. Laird;C. Grant;J. Morse