论文标题
ALMA 0.02“ - 分辨率观察结果揭示了NGC 1068核的HCN充值反向旋转和流出的致密分子气
ALMA 0.02"-resolution observations reveal HCN-abundance-enhanced counter-rotating and outflowing dense molecular gas at the NGC 1068 nucleus
论文作者
论文摘要
我们提出了附近(〜14 MPC)型(〜14 MPC)Agn NGC 1068的ALMA 〜0.02“ - 分辨率观察,当时HCN/HCN/HCO+/HNC J = 3-2行,以及在13c的同位素学和振动线上的13C同位素和振动线,以仔细化围绕形式/动态/化学物质的粉尘,以置于形式/化学/化学物理性能中,以弥漫性的尘埃量为细菌的生理性量,并构成了细菌的生理性,并构成了细分的生理性,并将其化学分子刺激为细菌的生理型,并将其刺激性分子构成了细分的分子型分子的量。质量质量的黑洞。在〜7 pc的圆环区域内的HCO+ J = 3-2,我们的密集分子质量为(0.4-1.0)x10^6msun,我们认为HCN的丰度在圆环中增强了。分子线旋转速度相对于全身速度,在外部和西部圆环中,在外部(> 2 pc)中,我们更喜欢反向旋转的密集分子气体的场景,并具有几乎是keplerian的差异,并且较低的旋转(远低于keplerian)的属性构成了我们的propert torrelent。 1068比经典AGN统一范式中简单的公理对称旋转圆环图片要复杂得多。
We present ALMA ~0.02"-resolution observations of the nucleus of the nearby (~14 Mpc) type-2 AGN NGC 1068 at HCN/HCO+/HNC J=3-2 lines, as well as at their 13C isotopologue and vibrationally excited lines, to scrutinize the morphological/dynamical/chemical/physical properties of dense molecular gas in the putative dusty molecular torus around a mass-accreting supermassive black hole. We confirm almost east-west-oriented dense molecular gas emission both morphologically and dynamically, which we regard as coming from the torus. Bright emission is compact (<3 pc), and low-surface-brightness emission extends out to 5-7 pc. These dense molecular gas properties are not symmetric between the eastern and western torus. The HCN J=3-2 emission is stronger than the HCO+ J=3-2 emission within the ~7 pc torus region, with an estimated dense molecular mass of (0.4-1.0)x10^6Msun. We interpret that HCN abundance is enhanced in the torus. We detect signatures of outflowing dense molecular gas and a vibrationally excited HCN J=3-2 line. Finally, we find that in the innermost (<1 pc) part of the torus, the dense molecular line rotation velocity, relative to the systemic velocity, is the opposite of that in the outer (>2 pc) part, in both the eastern and western torus. We prefer a scenario of counter-rotating dense molecular gas with innermost almost-Keplerian-rotation and outer slowly rotating (far below Keplerian) components. Our high-spatial-resolution dense molecular line data reveal that torus properties of NGC 1068 are much more complicated than the simple axi-symmetrically rotating torus picture in the classical AGN unification paradigm.