论文标题
爆发V883 ORI系统的化学图：垂直和径向结构
A Chemical Map of the Outbursting V883 Ori system: Vertical and Radial Structures
论文作者
论文摘要
我们提出了试点计划的第一个结果，该计划是对年轻恒星对象（YSO）进行快速增生发作的年轻恒星对象（YSO）的光谱线研究6（211-275 GHz）光谱线研究的第一个结果。在这里，我们报告了FUOR系统的分子发射线观测值V883 ORI。为了将fuor对象映射为〜0.5 arcsec到〜30 arcsec的地图大小，即从光盘到流出尺度，我们将Alma Main Main数组（12-m数组）与Atacama Compact Array（7-m数组）和总功率（TP）组合在一起。我们检测到HCN，HCO $^{+} $，ch $ _ {3} $ oh，因此，DCN和H $ _ {2} $ CO发射，其中大多数这些行都显示复杂的运动学。 From PV diagrams, the detected molecules HCN, HCO$^{+}$, CH$_{3}$OH, DCN, SO, and H$_{2}$CO probe a Keplerian rotating disc in a direction perpendicular to the large-scale outflow detected previously with the $^{12}$CO and $^{13}$CO lines.此外，HCN和HCO $^{+} $揭示了输入运动的运动学签名。在HCO $^{+} $，H $ _ {2} $ CO等中可以看到北流出。有趣的是，HCO $^{+} $排放揭示了一个明显的内凹或“孔”，其大小可与CH $ _ {3} $ OH和230 GHz连续体估计的径向扩展相当。 V883 ORI的集成HCO $^{+} $强度分布的内部凹陷很可能是光学深度效应的结果，其中Hco $^{+} $的光学厚度性质以及对V883 Ori的最终部分的持续排放可能会导致最终的最终型号的the hco $^fluck $} $} $} $} $}。
We present the first results of a pilot program to conduct an Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 (211-275 GHz) spectral line study of young stellar objects (YSO) that are undergoing rapid accretion episodes, i.e. FU Ori objects (FUors). Here, we report on molecular emission line observations of the FUor system, V883 Ori. In order to image the FUor object with full coverage from ~0.5 arcsec to the map size of ~30 arcsec, i.e. from disc to outflow scales, we combine the ALMA main array (the 12-m array) with the Atacama Compact Array (7-m array) and the total power (TP) array. We detect HCN, HCO$^{+}$, CH$_{3}$OH, SO, DCN, and H$_{2}$CO emissions with most of these lines displaying complex kinematics. From PV diagrams, the detected molecules HCN, HCO$^{+}$, CH$_{3}$OH, DCN, SO, and H$_{2}$CO probe a Keplerian rotating disc in a direction perpendicular to the large-scale outflow detected previously with the $^{12}$CO and $^{13}$CO lines. Additionally, HCN and HCO$^{+}$ reveal kinematic signatures of infall motion. The north outflow is seen in HCO$^{+}$, H$_{2}$CO, and SO emissions. Interestingly, HCO$^{+}$ emission reveals a pronounced inner depression or "hole" with a size comparable to the radial extension estimated for the CH$_{3}$OH and 230 GHz continuum. The inner depression in the integrated HCO$^{+}$ intensity distribution of V883 Ori is most likely the result of optical depth effects, wherein the optically thick nature of the HCO$^{+}$ and continuum emission towards the innermost parts of V883 Ori can result in a continuum subtraction artifact in the final HCO$^{+}$ flux level.
