Proper Motion of J1207-3900 and J1247-3816 vs TWA Members

This figure shows map of the position and proper motion of bona fide members to TW Hydrae (green arrows; Malo et al. 2013, second link), compared to those of J1247-3816 and J1207-3900 (red arrows; see Gagné et al. 2014b, first link). Each star's proper motion vector is prolongated into a great circle on the celestial sphere, to show that they converge in two points (the apex and anti-apex, blue circles are 1-sigma and 3-sigma apex calculated from the XYZUVW models; See Gagné et al. 2014a; third link), which are often close to the Solar's apex and anti-apex (black cross and plus signs). Thanks to Adric Riedel for help in the construction of these figures, and see some similar figures that he made in the 4th related link. Please cite the references indicated in the related links below if you use this figure.

本图展示了长蛇座TW星协（TW Hydrae）真实成员星的位置与自行（proper motion）分布（绿色箭头；数据引自Malo等人2013年的研究，对应第2个相关链接），并与J1247-3816和J1207-3900的自行分布进行对比（红色箭头；详见Gagné等人2014b的研究，对应第1个相关链接）。每颗恒星的自行矢量均延伸至天球上的大圆，以呈现其汇聚于两个点的特征——向点（apex）与反向点（anti-apex）；蓝色圆圈代表基于XYZUVW模型（XYZUVW models）计算得到的1σ与3σ向点置信范围（详见Gagné等人2014a的研究，对应第3个相关链接），这两个汇聚点通常与太阳向点（Solar's apex）及太阳反向点相近（以黑色十字与加号标记）。感谢Adric Riedel为本图制作提供协助，他所制作的同类相关图表可参见第4个相关链接。若使用本图，请引用下方相关链接中标注的参考文献。