论文标题
银河HII区域在形成细丝中的作用。 rcw 120的高分辨率亚列表成像与Artémis
The role of Galactic HII regions in the formation of filaments. High-resolution submilimeter imaging of RCW 120 with ArTéMiS
论文作者
论文摘要
巨大的恒星及其相关的电离（HII）区域可能在托管恒星形成的细丝的形成和演变中起关键作用。但是，与H区域相互作用的细丝的特性仍然很众所周知。为了研究HII区域对细丝形成的影响，我们成像了银河HII区域RCW 120及其周围的周围环境发生了活跃的恒星形成以及电离反馈对恒星形成过程的作用。我们在Apex望远镜上使用了Artémis摄像头，并将Artémis数据（350和450微米）与Herschel-Spire/Hobys组合在一起。我们研究了RCW 120周围的密集气体分布，分辨率为8 ArcSec（0.05 PC，距离为1.34 kpc）。我们的研究使我们能够追踪RCW 120的致密壳的中值径向强度曲线。此曲线是不对称的，表明壳体内部的HII区域明显压缩。观察到该轮廓在壳的两个侧面都类似地不对称，表明表面上有均匀的压缩。相反，与壳相关的径向丝的轮廓分析显示出对称曲线，这表明来自离子化区域的压缩仅限于致密壳。壳的内部部分的平均强度曲线非常适合Plummer，例如plummer，vlumsian fwhm的pc pc pc pc cons flummer figert croper copertions中的细丝中观察到的vhm vwhm为0.09 pc。这项研究表明，HII区域施加的压缩可能在细丝的形成中起关键作用，并可能进一步对其托管恒星形成作用。 Artémis数据还表明RCW 120可能是3D环，而不是球形结构
Massive stars and their associated ionized (HII) regions could play a key role in the formation and evolution of filaments that host star formation. However, the properties of filaments that interact with H regions are still poorly known. To investigate the impact of HII regions on the formation of filaments, we imaged the Galactic HII region RCW 120 and its surroundings where active star formation takes place and where the role of ionization feedback on the star formation process has already been studied. We used the ArTéMiS camera on the APEX telescope and combined the ArTéMiS data at 350 and 450 microns with Herschel-SPIRE/HOBYS. We studied the dense gas distribution around RCW 120 with a resolution of 8 arcsec (0.05 pc at a distance of 1.34 kpc). Our study allows us to trace the median radial intensity profile of the dense shell of RCW 120. This profile is asymmetric, indicating a clear compression from the HII region on the inner part of the shell. The profile is observed to be similarly asymmetric on both lateral sides of the shell, indicating a homogeneous compression over the surface. On the contrary, the profile analysis of a radial filament associated with the shell, but located outside of it, reveals a symmetric profile, suggesting that the compression from the ionized region is limited to the dense shell. The mean intensity profile of the internal part of the shell is well fitted by a Plummer like profile with a deconvolved Gaussian FWHM of 0.09 pc, as observed for filaments in low-mass star-forming regions. This study suggests that compression exerted by HII regions may play a key role in the formation of filaments and may further act on their hosted star formation. ArTéMiS data also suggest that RCW 120 might be a 3D ring, rather than a spherical structure
