论文标题
阿尔玛（Alma
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Deriving Inclination Angle and Velocity of the Protostellar Jets from their SiO Knots
论文作者
论文摘要
我们选择了六个来源（G209.55-19.68S2，G205.46-14.56S1 $ _ { - } $ a，G203.21-11.20W2，G191.90-11.21S，G205.46-14.56S3和G206.93-16.611W2）的ATAC Millimeter nircame nircame inircame inircame inircame inircame nircame银河冷团（Almasop），其中这些来源已在CO（J = 2-1），SIO（J = 5-4）和C $^{18} $ O（J = 2-1）线中映射。这些来源具有高速SIO喷气机，周围是低速共流。 SIO喷气机由一连串的结链组成。这些结被认为是由射流速度的半周期变化产生的。因此，我们采用了一个冲击模型，该模型使用这种变化来估计喷气机的倾斜角度和速度。我们还使用广角风向壳模型来得出CO流出的倾斜角，并发现它与相关的SIO Jets的倾斜角度一致。此外，我们将这种震动形成模型应用于文献中具有SIO喷射的另外三个原始源 - HH 211，HH 212和L1448C（N） - 发现它们的倾斜角和射流速度与先前根据适当的运动和径向速度研究估计的倾斜角度和射流速度是一致的。
We have selected six sources (G209.55-19.68S2, G205.46-14.56S1$_{-}$A, G203.21-11.20W2, G191.90-11.21S, G205.46-14.56S3, and G206.93-16.61W2) from the Atacama Large Millimeter/submillimeter Array Survey of Orion Planck Galactic Cold Clumps (ALMASOP), in which these sources have been mapped in the CO (J=2-1), SiO (J=5-4), and C$^{18}$O (J=2-1) lines. These sources have high-velocity SiO jets surrounded by low-velocity CO outflows. The SiO jets consist of a chain of knots. These knots have been thought to be produced by semi-periodical variations in jet velocity. Therefore, we adopt a shock-forming model, which uses such variations to estimate the inclination angle and velocity of the jets. We also derive the inclination angle of the CO outflows using the wide-angle wind-driven shell model, and find it to be broadly consistent with that of the associated SiO jets. In addition, we apply this shock-forming model to another three protostellar sources with SiO jets in the literature -- HH 211, HH 212, and L1448C(N) -- and find that their inclination angle and jet velocity are consistent with those previously estimated from proper motion and radial velocity studies.
