Binary properties of Wolf-Rayet stars in nearby galaxies

附近星系中沃尔夫拉叶星的二元特性

• 批准号: 1647894
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1647894
• 关键词: Binary; properties; Wolf; Rayet; stars

Wolf-Rayet stars are the evolved descendants of massive O and early B stars, and it has recently been recognised that a high fraction of massive stars are born in close binary systems. This project will focus on establishing binary properties of Wolf-Rayet stars in nearby galaxies spanning a range of metallicities, based on a mixture of optical spectroscopic datasets (primarily ground-based from 8-10m class telescopes for WR stars in other galaxies) and X-ray observations (from Chandra T-ReX programme). These approaches are complementary since optical observations are sensitive to Doppler shifts in close binaries whereas X-ray datasets focus on colliding wind systems which sample somewhat larger separations. Initial targets are IC10 (metal-poor draft galaxy in Local Group) and the Tarantula region in the LMC.

Wolf-Rayet恒星是大质量O星和早期B星的演化后代，最近人们认识到，很大一部分大质量恒星是在近双星系统中诞生的。该项目将侧重于根据光学光谱数据集(主要是地面8-10m级望远镜对其他星系中的WR恒星的观测)和X射线观测(来自Chandra T-Rex计划)，确定附近星系中跨越一系列金属丰度的Wolf-Rayet恒星的双星属性。这些方法是互补的，因为光学观测对近双星中的多普勒频移很敏感，而X射线数据集专注于采样较大间隔的碰撞风系统。最初的目标是IC10(局部群中的贫金属吃水星系)和LMC中的狼蛛区域。

项目成果

The Search for Wolf-Rayet Stars in IC10

在 IC10 中寻找沃尔夫拉叶星

• DOI: 10.1017/s1743921317001867
• 发表时间: 2017
• 期刊: Proceedings of the International Astronomical Union
• 作者: Tehrani K

Revealing the nebular properties and Wolf-Rayet population of IC10 with Gemini/GMOS

用 Gemini/GMOS 揭示 IC10 的星云特性和 Wolf-Rayet 族群

• DOI: 10.1093/mnras/stx2124
• 发表时间: 2017
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Tehrani K

Weighing Melnick 34: the most massive binary system known

称量 Melnick 34：已知最大的双星系统

• DOI: 10.1093/mnras/stz147
• 发表时间: 2019
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Tehrani K