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arXiv 2402.12596astro-ph.GA
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Radcliffe Wave正在振荡

The Radcliffe Wave is Oscillating

Ralf Konietzka, Alyssa A. Goodman, Catherine Zucker, Andreas Burkert, João Alves, Michael Foley, Cameren Swiggum, Maria Koller, Núria Miret-Roig

备注：
Published in Nature on 20 February 2024. For data, interactive visualizations, and more information see https://sites.google.com/cfa.harvard.edu/radcliffewave
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AI总结：

本研究发现Radcliffe Wave正在银河系平面振荡并径向漂移，通过分析年轻星团和气体云速度，将其作为相干振荡结构推导银河系势性质，并指出Local Bubble起源星团可能诞生于此。

摘要：

我们的太阳位于距离2.7 kpc长的正弦形致密气体云链（称为Radcliffe Wave）300 pc范围内。该结构的波形形状是利用3D尘埃映射发现的，但最初对振荡运动的运动学搜索尚无定论。在此，我们提出证据表明Radcliffe Wave正在穿过银河系平面振荡，同时沿径向远离银河系中心漂移。我们使用12CO的视线速度测量值和年轻星团的3D速度，表明与Radcliffe Wave在空间上相关的最大质量恒星形成区（包括Orion、Cepheus、North America和Cygnus X）的运动方式表明它们是由银河系势的引力加速度驱动的振荡波的一部分。通过将Radcliffe Wave视为一个相干振荡结构，我们可以独立于局部银河系质量分布推导其运动，并直接测量银河系势的局部性质以及太阳的垂直振荡周期。此外，测得的Radcliffe Wave从银河系中心向外径向漂移表明，其超新星最终创造了今天膨胀的Local Bubble的星团可能诞生于Radcliffe Wave中。

英文摘要：

Our Sun lies within 300 pc of the 2.7-kpc-long sinusoidal chain of dense gas clouds known as the Radcliffe Wave. The structure's wave-like shape was discovered using 3D dust mapping, but initial kinematic searches for oscillatory motion were inconclusive. Here we present evidence that the Radcliffe Wave is oscillating through the Galactic plane while also drifting radially away from the Galactic Center. We use measurements of line-of-sight velocity for 12CO and 3D velocities of young stellar clusters to show that the most massive star-forming regions spatially associated with the Radcliffe Wave (including Orion, Cepheus, North America, and Cygnus X) move as if they are part of an oscillating wave driven by the gravitational acceleration of the Galactic potential. By treating the Radcliffe Wave as a coherently oscillating structure, we can derive its motion independently of the local Galactic mass distribution, and directly measure local properties of the Galactic potential as well as the Sun's vertical oscillation period. In addition, the measured drift of the Radcliffe Wave radially outward from the Galactic Center suggests that the cluster whose supernovae ultimately created today's expanding Local Bubble may have been born in the Radcliffe Wave.

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