$\ ho$ Oph II 的多波段观测:解开多星系统 C 组分变异性之谜
A Multiwavelength View of $ρ$ Oph II: Disentangling the Variability of the Multi-Star Component C
浏览论文内容
中文总结 AI 辅助
通过多波段观测,确认 $\ ho$ Oph C 是由一颗热星和两颗冷星组成的罕见三星系统,并解开了其变异性来源。
中文摘要 AI 辅助
我们对恒星 $\ ho$ Oph C 进行了多波段分析,覆盖了 X 射线、光学、近红外和射电观测,以检验干涉测量探测到的冷星伴星是否存在。来自钱德拉(Chandra)、XMM-牛顿(XMM-Newton)和核光谱望远镜阵列(NuSTAR)的 X 射线观测显示了持续数分钟或数天的耀斑事件,其光谱特性与较冷的恒星一致,而非主序磁 B 型星。近红外数据也与所提出的三星系统性质一致,因为存在 CO 带带头。在移除主 B 型星的自转后,来自凌日系外行星勘测卫星(TESS)的光学数据显示出 0.8 毫星等的残余信号,与围绕明亮 B 型星运行的冷星所预期的变化相匹配。最后,多历元射电数据揭示 $\ ho$ Oph C 表现出显著的大尺度通量变化,这对于磁大质量恒星而言是非典型的。总体而言,多历元和多波段数据呈现了 $\ ho$ Oph C 的一致图像,即一个由一颗热星和两颗冷星组成的罕见三星系统。
英文摘要
We present a multiwavelength analysis of the star $ρ$ Oph C, covering X-ray, optical, near-infrared, and radio observations to test for the presence of interferometrically-detected cool star companions. The X-ray observations from Chandra, XMM-Newton, and NuSTAR show flare-like events lasting minutes or days in time and spectral properties consistent with those of cooler stars instead of the primary magnetic B star. The near-infrared data is also consistent with the proposed trinary system properties due to the presence of CO-band heads. After removing the primary B star's rotation, the optical data from TESS shows a residual signal at the level of 0.8 mmags, matching the variations expected from cool stars in orbit around a bright B star. Finally, multi-epoch radio data reveals that $ρ$ Oph C exhibits significant large scale flux variations that are atypical for a magnetic massive star. Taken as a whole, the multi-epoch and -wavelength data presents a consistent picture of $ρ$\,Oph\,C as a rare trinary system composed of a hot star and two cool stars.
发表机构
- Massachusetts Institute of Technology(麻省理工学院)
- Macalester College(麦考利斯特学院)
- Space Telescope Science Institute(太空望远镜科学研究所)
- California State University, Fresno(加州州立大学弗雷斯诺分校)
- University of Iowa(爱荷华大学)
- East Tennessee State University(东田纳西州立大学)
- Embry Riddle Aeronautical University(埃默里·里德尔航空大学)
机构由 AI 辅助整理,请以论文原文为准。