论文标题
水梅尔调查对射手座恒星流的轨道平面周围的面板外的AGB
Water Maser Survey towards off-plane O-rich AGBs around the orbital plane of the Sagittarius Stellar Stream
论文作者
论文摘要
对178个O-Rich AGB恒星进行了22 GHz水的测量，目的是确定与Sagittarius Stellar流相关的Maser排放。在这项调查中，在21个目标中检测到了Maser排放，其中20个是新的检测。我们研究了H2O和Sio Maser跟踪的AGB向SGR轨道平面的银河分布，并发现了朝向（L，B）〜（340，40）方向的细长结构。为了验证其与Sagittarius Tidal流的关联，我们进一步研究了这些来源的3D运动，但从运动角度发现，这些Maser痕迹的AGB仍然是银河盘源，而不是流碎片。此外，我们发现了一个显着的向外运动，距离这些Maser Traded AGB的银河系中心约50 km/s，但没有旋转速度的系统滞后滞后，这在2000年据报道太阳能邻域Miras。
A 22 GHz water maser survey was conducted towards 178 O-rich AGB stars with the aim of identifying maser emission associated with the Sagittarius stellar stream. In this survey, maser emissions were detected in 21 targets, of which 20 were new detections. We studied the Galactic distributions of H2O and SiO maser-traced AGBs towards the Sgr orbital plane, and found an elongated structure towards the (l, b)~(340, 40) direction. In order to verify its association with the Sagittarius tidal stream, we further studied the 3D motions of these sources, but found, kinematically, these maser-traced AGBs are still Galactic disc sources rather than Stream debris. In addition, we found a remarkable outward motion, ~50 km/s away from the Galactic center of these maser-traced AGBs, but with no systermatic lag of rotational speed which were reported in 2000 for solar neighborhood Miras.
