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arXiv 2609.29809astro-ph.SRastro-ph.HE

$\ ho$ 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

Sean J. Gunderson, Walter W. Golay, Jackson Codd, David P. Huenemoerder, Felipe Navarete, Christiana Erba, Alexandrea Moreno, John M. Cannon, Richard Ignace, Pr… 展开作者

Sean J. Gunderson, Walter W. Golay, Jackson Codd, David P. Huenemoerder, Felipe Navarete, Christiana Erba, Alexandrea Moreno, John M. Cannon, Richard Ignace, Pragati Pradhan, the MACRO consortium

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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。

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