Data for the article "Typhon: a polar stream from the outer halo raining through the Solar neighborhood"
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This data contains the stellar parameters of Typhon stream stars in the context of the "Typhon: a polar stream from the outer halo raining through the Solar neighborhood" (Tenachi et al. 2022) paper, in two formats:.csv and .fits (which also contains a short description of each column). This data includes: Stellar coordinates and parameters from Gaia DR3 (Gaia Collaboration 2022) with extinction-corrected magnitudes using the (Schlafly and Finkbeiner 2011) corrections to the (Schlegel et al. 1998) extinction maps, assuming the extinction ratios A<sub>G</sub>/A<sub>V</sub> = 0.86117, A<sub>GBP</sub>/A<sub>V</sub> = 1.06126 and A<sub>GRP</sub> /A<sub>V</sub> = 0.64753, as listed on the web interface to the PARSEC isochrones (Bressan et al. 2012) and assuming a solar position (x,y,z) = (−8.2240, 0, 0.0028) kpc (Bovy 2020, Widmark et al. 2021) and a solar velocity (vx,vy,vz) = (11.10, 7.20, 7.25) km/s with a circular velocity = 243 km/s (Schonrich et al. 2010, Bovy 2020). Added dynamical parameters (actions, energy, apocenters and pericenters values) derived in a (McMillan et al 2017) potential. Metallicity parameters from LAMOST DR8 PASTEL column (Wang et al 2022). Independent measurements from the "Chemical Abundances of the Typhon Stellar Stream" follow-up paper (Ji et al 2022).
本数据集收录了《提丰:一道穿过太阳邻域的外银晕极流》(*Typhon: a polar stream from the outer halo raining through the Solar neighborhood*,Tenachi 等人 2022 年)论文中涉及的提丰流恒星参数,提供 .csv 与 .fits 两种格式,其中 .fits 格式还附带各列的简要说明。 该数据集涵盖以下内容:基于盖亚第三版数据发布(Gaia DR3,Gaia 合作团队 2022 年)的恒星坐标与参数,采用施拉夫利与芬克拜因(Schlafly and Finkbeiner,2011 年)对施莱格尔等人(Schlegel et al.,1998 年)消光图的修正方法进行消光校正后的星等;校正采用的消光比为 A_G/A_V = 0.86117、A_GBP/A_V = 1.06126 及 A_GRP/A_V = 0.64753,该参数取自帕瑞克等值线网格(PARSEC isochrones)网页界面(Bressan 等人 2012 年)。 数据集同时采用了如下天文基准参数:太阳位置为 (x,y,z) = (−8.2240, 0, 0.0028) kpc(Bovy,2020 年;Widmark 等人,2021 年),太阳速度为 (v_x,v_y,v_z) = (11.10, 7.20, 7.25) km/s,圆周速度设定为 243 km/s(Schonrich 等人,2010 年;Bovy,2020 年)。 此外,数据集还添加了基于麦克米兰等人(McMillan et al.,2017 年)势场推导得到的动力学参数,包括作用量、能量、远心点与近心点数值;金属丰度参数取自郭守敬望远镜(LAMOST)第八版数据发布(LAMOST DR8)的 PASTEL 表(Wang 等人,2022 年);还包含来自《提丰恒星流的化学丰度》(*Chemical Abundances of the Typhon Stellar Stream*)后续论文(Ji 等人,2022 年)的独立测量结果。



