论文标题
边缘塌陷和枢纽丝构型的同时证据：巨型分子丝G45.3+0.1的罕见案例研究
Simultaneous evidence of edge collapse and hub-filament configurations: A rare case study of a Giant Molecular Filament G45.3+0.1
论文作者
论文摘要
我们研究了多波长和多尺度数据，以研究与Aquila星座中与星形成络合物G045.49+00.04（G45E）和G045.14+00.14（G45W）相关的分子气体的运动学。对Fugin $^{13} $ CO（1-0）线数据的分析揭示了巨大的分子灯丝的存在（GMF G45.3+0.1;长度$ \ sim $ \ sim $ 75 PC，质量$ \ sim $ \ sim $ \ sim $ \ sim $ \ sim $ \ sim $ \ times $ 10 $^{6} $^{6} $ m $ _ $ _ { s $^{ - 1} $。 GMF G45.3+0.1在其相对的末端托有G45E和G45W复合物。我们发现沿GMF G45.3+0.1的大规模速度振荡，这也揭示了$ -0.064的线性速度梯度和$+$+$+$+0.032 km S $^{ - 1} $ pc $^{ - 1} $在其边缘。点状源的光度分析显示，在灯丝边缘也存在着较高的气体和HII区域的存在，在灯丝边缘也存在着幼体恒星对象（YSO）候选源的聚类。 Herschel Continuum映射以及黑猩猩$^{13} $ CO（3-2）线数据揭示了位于G45E和G45W的站点中的Parsec Scale Hub丝系统（HFSS）的存在。我们的研究表明，GMF G45.3+0.1的全球崩溃是由终端主导的，还增加了边缘的全球非异体崩溃（GNIC）的签名。总体而言，GMF G45.3+0.1是第一个同时研究边缘塌陷和集线器构型的细丝样本。这些观察结果开辟了大规模恒星形成的新可能性，包括HFSS的形成。
We study multiwavelength and multiscale data to investigate the kinematics of molecular gas associated with the star-forming complexes G045.49+00.04 (G45E) and G045.14+00.14 (G45W) in the Aquila constellation. An analysis of the FUGIN $^{13}$CO(1-0) line data unveils the presence of a giant molecular filament (GMF G45.3+0.1; length $\sim$75 pc, mass $\sim$1.1$\times$10$^{6}$ M$_{\odot}$) having a coherent velocity structure at [53, 63] km s$^{-1}$. The GMF G45.3+0.1 hosts G45E and G45W complexes at its opposite ends. We find large scale velocity oscillations along GMF G45.3+0.1, which also reveals the linear velocity gradients of $-$0.064 and $+$0.032 km s$^{-1}$ pc$^{-1}$ at its edges. The photometric analysis of point-like sources shows the clustering of young stellar object (YSO) candidate sources at the filament's edges where the presence of dense gas and HII regions are also spatially observed. The Herschel continuum maps along with the CHIMPS $^{13}$CO(3-2) line data unravel the presence of parsec scale hub-filament systems (HFSs) in both the sites, G45E and G45W. Our study suggests that the global collapse of GMF G45.3+0.1 is end-dominated, with addition to the signature of global nonisotropic collapse (GNIC) at the edges. Overall, GMF G45.3+0.1 is the first observational sample of filament where the edge collapse and the hub-filament configurations are simultaneously investigated. These observations open up the new possibility of massive star formation, including the formation of HFSs.
