论文标题

对Aquila Rift Cloud Complex的氨观测

Ammonia observations towards the Aquila Rift cloud complex

论文作者

Tursun, Kadirya, Esimbek, Jarken, Henkel, Christian, Tang, Xindi, Wu, Gang, Li, Dalei, Zhou, Jianjun, He, Yuxin, Komesh, Toktarkhan, Sailanbek, Serikbek

论文摘要

我们调查了NH $ _3 $(1,1)和(2,2)过渡的Aquila Rift综合体,包括Serpens South和W40地区,利用Nanshan 26-M望远镜。 Aquila Rift综合体中浓气气体的动力温度从8.9到35.0k,平均为15.3 $ \ pm $ 6.1K。低气温与蛇形南部的低气温从8.9到16.8k不等,平均为12.3 $ \ pm $ 1.7K,而W40区域中的浓气气则显示较高的温度较高,范围为17.7至35.0K,平均为25.1 $ \ pm $ 4.9 k。相比,相比的气温和尘埃相比,尘埃不一致,尘埃均与尘埃相比,尘埃不足,这是尘埃高度的尘埃,该尘埃与尘埃相比,该粉尘均与尘埃相比,该粉尘均为粉尘,该粉尘均与尘埃相比,该粉尘均为粉尘,并在尘埃不足。蛇形南部的地层区域。在高质量恒星形成区W40中,测得的气体动力学温度高于灰尘。发现NH $ _3 $(1,1)的速度分散液的湍流成分与气体动力学温度呈正相关,这表明湍流能量的耗散可能会加热密集的气体。对于通过与代表灰尘排放的Herschel红外连续数据进行比较获得的分数NH3丰度,我们找到了0.1至21 $ \ times 10^{ - 8} $的值,平均为6.9 $(\ pm 4.5)\ times 10^{ - 8} $。 Serpens South还显示了一个总NH3的含量,范围从0.2到21 $ \ times 10^{ - 8} $,平均为8.6($ \ pm 3.8)\ times 10^{ - 8} $。在W40中,值较低,在0.1和4.3 $ \ times 10^{ - 8} $之间,平均为1.6($ \ pm 1.4)\ times 10^{ - 8} $。弱速度梯度表明,旋转能是重力能量的一部分。在W40中,气体和灰尘温度并不强烈取决于与最近形成的大型恒星的预计距离。总体而言,映射区域的形态是环状的,在较高银河纵向下发射下的较低和弱发射。

We surveyed the Aquila Rift complex including the Serpens South and W40 region in the NH$_3$(1,1) and (2,2) transitions making use of the Nanshan 26-m telescope. The kinetic temperatures of the dense gas in the Aquila Rift complex range from 8.9 to 35.0K with an average of 15.3$\pm$6.1K. Low gas temperatures associate with Serpens South ranging from 8.9 to 16.8K with an average 12.3$\pm$1.7K, while dense gas in the W40 region shows higher temperatures ranging from 17.7 to 35.0K with an average of 25.1$\pm$4.9 K. A comparison of kinetic temperatures against HiGal dust temperatures indicates that the gas and dust temperatures are in agreement in the low mass star formation region of Serpens South. In the high mass star formation region W40, the measured gas kinetic temperatures are higher than those of the dust. The turbulent component of the velocity dispersion of NH$_3$(1,1) is found to be positively correlated with the gas kinetic temperature, which indicates that the dense gas may be heated by dissipation of turbulent energy. For the fractional total-NH3 abundance obtained by a comparison with Herschel infrared continuum data representing dust emission we find values from 0.1 to 21$\times 10^{-8}$ with an average of 6.9$(\pm 4.5)\times 10^{-8}$. Serpens South also shows a fractional total-NH3 abundance ranging from 0.2 to 21$\times 10^{-8}$ with an average of 8.6($\pm 3.8)\times 10^{-8}$. In W40, values are lower, between 0.1 and 4.3$\times 10^{-8}$ with an average of 1.6($\pm 1.4)\times 10^{-8}$. Weak velocity gradients demonstrate that the rotational energy is a negligible fraction of the gravitational energy. In W40, gas and dust temperatures are not strongly dependent on the projected distance to the recently formed massive stars. Overall, the morphology of the mapped region is ring-like, with strong emission at lower and weak emission at higher Galactic longitudes.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源