发表机构
Universidad Andres Bello; Vatican Observatory; ESO - European Southern Observatory（安第斯贝尔托大学; 梵蒂冈天文台; 欧洲南方天文台）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
利用MUSE视向速度数据，确认了四个银河系核球球状星团候选体中的两个（Minni 23和Minni 07），并验证了该方法的有效性，为更大样本的确认提供了途径。
AI 中文摘要
银河系约有220个已编目的球状星团。这一数量远小于类似星系仙女座（约600个球状星团）中的发现。造成这一巨大差异的两个可能原因是观测偏差和星团瓦解。红外光度巡天VVVX（VISTA Variables in the Via Lactea Extended）已向银河系核球方向发现了许多需要确认的球状星团候选体。我们基于MUSE数据的视向速度，确认了四个来自银河系核球的候选体的球状星团性质。遵循我们以往的经验和方法，我们通过将视向速度分布分解为核球、盘和潜在星团成分，搜索视向速度分布的峰值。对于Minni 23，我们确认了先前发现的参数：这是一个年老且富含金属的核球球状星团。此外，我们发现了与候选球状星团Minni 07相关的视向速度峰值，其$\u03bc_{RV,cl}=80^{+26}_{-22}$ km s$^{-1}$，$\u03c3_{RV,cl}=48^{+15}_{-15}$ km s$^{-1}$。我们还推导出Minni 07的$A_V=1.5$和[Fe/H]$\u2248-0.27$。另一方面，对于候选体Minni 10和Minni 19，我们无法利用当前可用的数据可靠地确认其球状星团性质。所设计的策略已被证明对所提出的目标有效，值得将其重复应用于更大的候选球状星团样本。
英文摘要
The Milky Way has about 220 cataloged globular clusters. This number is far smaller than what is found in a similar galaxy such as Andromeda, which has about 600 globular clusters. Two possible reasons for this large difference might be observational bias and cluster dissolution. The infrared photometric survey VISTA Variables in the Via Lactea Extended has discovered many globular cluster candidates toward the Galactic bulge that need confirmation. We confirm the globular cluster nature of four candidates from the Galactic bulge based on radial velocities from MUSE data. Following our previous experience and method, we searched for a peak in the radial velocity distribution by deconvolving the radial velocity distribution into its bulge, disk, and potential cluster components. For Minni 23, we confirm the previously found parameters: this is an old and metal-rich bulge globular cluster. Additionally, we found a radial velocity peak associated with the candidate globular cluster Minni 07, with $μ_{RV,cl}=80^{+26}_{-22}$ ${\rm km\ s}^{-1}$, $σ_{RV,cl}=48^{+15}_{-15}$ ${\rm km\ s}^{-1}$. We also derived $A_V=1.5$ and [Fe/H]$\approx-0.27$ for Minni 07. On the other hand, we were unable to reliably confirm the globular cluster nature for the candidates Minni 10 and Minni 19 with the currently available data. The devised strategy has proven to be efficient for the proposed goals, and it is worth repeating it for the larger sample of candidate globular clusters.
CommentsAccepted for publication in A&A. 10 pages, 14 figures
DOI：10.1051/0004-6361/202658882
