论文标题
监视Ry Tau喷气机中的内部区域
Monitoring inner regions in the RY Tau jet
论文作者
论文摘要
我们介绍了H $α$的Ry〜tau Jet的多个观测值，以及[\ ion {fe} {2}] 1.644 \ micron〜发射线，使用Subaru/scexao+Vampires，gemini/nifs和Keck/Osiris在2019年在2019年获得了Subaru/scexao+Vampires，gemini/nifs和keck/osiris。这些数据显示了在1 $ \ arcsec $中的一系列四节，与$ \ sim $ 0 \ farcs3〜 yr $^{ - 1} $的适当运动一致，类似于与另一个活跃的T-Tauri星星相关的喷气机。但是，结之间的空间间隔表明，弹出约1.2、0.7和0.7岁的时间间隔比其他恒星估计的时间短得多。这些H $α$图像与2015年的档案VLT/Sphere/Zimpol观察结果形成鲜明对比，该图像仅显示出一个类似单的功能，该功能在$ \ sim0 \ farcs25 $中。 2015年至2019--2021时期的差异表明，在六年范围内存在不规则的弹出间隔。喷射弹射的这种变化可能与质量积聚率的短期（$ 1年）变异性有关。我们将H $α$排放的峰与2015年获取的Zimpol数据进行了比较，显示了基本的亮度（$ <0 \ farcs3 $），而不是2020--2021吸血鬼概况，这是由于时间变化的质量弹性率或射流中的供热平衡。观察到的喷射结结构可能归因于固定冲击，但是需要更高的角度分辨率来确认其详细的起源。
We present multi-epoch observations of the RY~Tau jet for H$α$ and [\ion{Fe}{2}] 1.644 \micron~emission lines obtained with Subaru/SCExAO+VAMPIRES, Gemini/NIFS, and Keck/OSIRIS in 2019--2021. These data show a series of four knots within 1$\arcsec$ consistent with the proper motion of $\sim$0\farcs3~yr$^{-1}$, analogous to the jets associated with another few active T-Tauri stars. However, the spatial intervals between the knots suggest the time intervals of the ejections of about 1.2, 0.7, and 0.7 years, significantly shorter than those estimated for the other stars. These H$α$ images contrast with the archival VLT/SPHERE/ZIMPOL observations from 2015, which showed only a single knot-like feature at $\sim0\farcs25$. The difference between the 2015 and 2019--2021 epochs suggests an irregular ejection interval within the six-year range. Such variations of the jet ejection may be related to a short-term ($<$1 year) variability of the mass accretion rate. We compared the peaks of the H$α$ emissions with the ZIMPOL data taken in 2015, showing the brighter profile at the base ($<0\farcs3$) than the 2020--2021 VAMPIRES profiles due to time-variable mass ejection rates or the heating-cooling balance in the jet. The observed jet knot structures may be alternatively attributed to stationary shocks, but a higher angular resolution is required to confirm its detailed origin.
