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arXiv 2407.09934astro-ph.SR
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α Crucis系统的速逃性质与起源

The runaway nature and origin of α Crucis system

M. Torosyan, N. Azatyan, E. Nikoghosyan, A. Samsonyan, D. Andreasyan

AI总结:

本研究通过Gaia和WISE望远镜数据分析α Crucis系统,发现它属于某星团且相对速度仅约1.3 km/s,结合弓形激波未对齐的特征,证明其并非速逃星,弓形激波由星际介质大尺度运动导致。

摘要:

大质量恒星始终是天文学研究的焦点,其中有10%–20%的恒星会以高超音速在空间中运动。本文介绍了对α Crucis系统的研究结果,该系统距离太阳约114秒差距(pc),观测到其周围存在弓形激波。我们使用了Gaia和WISE空间望远镜的数据与图像,通过α Crucis系统的坐标、距离和自行测定了其空间速度。我们成功找到了α Crucis系统所属的星团,也就是说它并非从母星团中被抛射出来,而是与星团的其他成员一同在空间中运动。α Crucis系统相对于该星团的速度约为1.3 km/s。其弓形激波的几何参数与其他已知弓形激波相符。该弓形激波未对齐,即其形成最有可能是星际介质的大尺度运动导致的,这进一步证明了α Crucis系统不具备速逃星性质。

英文摘要:

Massive stars are always the focus of astronomical research and a significant part of them (10--20%) moves in space at a high (supersonic) velocity. This paper presents the results of a study of the $α$ Crucis system, located at $\sim$114 pc distance from the Sun, with an observed bow shock around it. We used data and images from the Gaia and WISE space telescopes. The coordinates, distance, and proper motion of the $α$ Crucis system were used to determine its space velocity. We managed to find a stellar cluster to which the $α$ Crucis system belongs, that is, it has not been ejected from its parent cluster, but is moving in space together with other members of the cluster. The $α$ Crucis system has a velocity of $\sim$1.3 km/s relative to the star cluster. The geometric parameters of the bow shock are compatible with other known bow shocks. The bow shock is unaligned, i.e., most likely interstellar medium large-scale motions are responsible for the resulting bow shock, which is further evidence that the $α$ Crucis system is not runaway in nature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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