论文标题
M10和M71的内部运动学
Internal Kinematics of M10 and M71
论文作者
论文摘要
我们使用单个radial速度(RV)测量值从Wiyn 3.5 M望远镜上使用hydra Multa-Objection仪,使用单个径向速度(RV)测量值介绍了两个球状簇(NGC 6254)和M71(NGC 6254)和M71(NGC 6838)的内部运动学研究。我们测量了M10中恒星的120架RV,其中107个被确定为群集成员。在M71中,我们测量了82架RV,并确定了78个属于群集成员的测量值。使用集群成员,我们确定平均RV为$ 75.9 \ PM 4.0 $(S.D.)km S $^{ - 1} $和$ -22.9 \ pm 2.2 $(S.D.)km S $^{ - 1} $,分别为M10和M71。我们将Hydra RV的测量与文献样本相结合,并对两个簇进行了视线旋转分析。除了内部区域(10 \ arcsec -117 \ arcsec)以外,我们的分析尚未揭示在这两个集群中的统计学上显着旋转,我们发现我们发现,我们发现,我们发现幅度显着旋转,并具有幅度显着的旋转,幅度v $ _ {rot} = 1.14 \ pm pm 0.14 \ pm 0.18 \ pm 0.18 $ km s $ s $ s $^$^{-1} $。对于M10,我们计算了$σ_{0} = 5.44 \ pm 0.61 $ km s $ s $^{ - 1} $的中央速度分散体,该速度的旋转幅度与中央速度分散$ v_ {rot}/σ_{0} = 0.21 = 0.21 = 0.21 \ pm 0.04 $ 0.04 $ 0.04 $。我们还探索了在M10和M71中鉴定出的多个恒星种群的旋转,并在每个人群中发现旋转(或缺乏旋转)以及群集全局旋转特征。
We present a study of the internal kinematics of two globular clusters, M10 (NGC 6254) and M71 (NGC 6838), using individual radial velocity (RV) measurements obtained from observations using the Hydra multi-object spectrograph on the WIYN 3.5 m telescope. We measured 120 RVs for stars in M10, of which 107 were determined to be cluster members. In M71, we measured 82 RVs and determined 78 of those measurements belonged to cluster members. Using the cluster members, we determine a mean RV of $75.9 \pm 4.0$ (s.d.) km s$^{-1}$ and $-22.9 \pm 2.2$ (s.d.) km s$^{-1}$ for M10 and M71, respectively. We combined the Hydra RV measurements with literature samples and performed a line-of-sight rotational analysis on both clusters. Our analysis has not revealed a statistically significant rotation in either of these clusters with the exception of the inner region (10\arcsec - 117\arcsec) of M10 for which we find hints of a marginally significant rotation with amplitude V$_{rot} = 1.14 \pm 0.18$ km s$^{-1}$. For M10, we calculate a central velocity dispersion of $σ_{0} = 5.44 \pm 0.61$ km s$^{-1}$, which gives a ratio of the amplitude of rotation to the central velocity dispersion $V_{rot}/σ_{0} = 0.21 \pm 0.04$. We also explored the rotation of the multiple stellar populations identified in M10 and M71 and found rotation (or lack thereof) in each population consistent with each other and the cluster global rotation signatures.