发表机构
National Astronomical Observatory of Japan; University of Virginia; Chalmers University of Technology; European Southern Observatory; Instituto de Astrofísica de Andalucía, CSIC; Institute of Science Tokyo; Shanghai Jiao Tong University（日本国立天文台; 弗吉尼亚大学; 查尔姆斯理工大学; 欧洲南方天文台; 安达卢西亚天体物理研究所，西班牙高等科学研究委员会; 东京科学大学; 上海交通大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究Sh2-284低金属丰度恒星形成复合体的致密核心质量函数，用ALMA 1.3毫米尘埃连续体观测，识别出多个候选致密核心并定义目录，发现高于2.5 \(M_\odot\)的高质量CMF可用类似萨尔皮特的斜率描述，表明低金属丰度对高质量CMF/IMF斜率影响不大。
AI 中文摘要
我们展示了对Sh2-284中致密核心质量函数（CMF）的ALMA 1.3毫米尘埃连续体研究，Sh2-284是一个低金属丰度的外银河系恒星形成复合体，金属丰度\(Z\sim1/3\) - \(1/2 Z_\odot\)。观测覆盖六个远红外亮子区域，分辨率约为0.65
英文摘要
We present an ALMA 1.3~mm dust continuum study of the dense core mass function (CMF) in Sh2-284, a low metallicity outer Galaxy star-forming complex with $Z\sim1/3$--$1/2~Z_\odot$. The observations cover six far-infrared bright subregions at $\sim$0.65" (3000~au) resolution. We identify a total of 91 candidate dense cores and define a robust catalog of 68 cores with Gaussian fitting. The high-mass CMF above 2.5 Msun is well described by a Salpeter-like slope, with a fiducial forward-modeled value of $α=1.22^{+0.24}_{-0.22}$ for $dN/d\log M\propto M^{-α}$. Together with existing constraints on the initial mass function (IMF) of Sh2-284, the Salpeter-like CMF is consistent with a resemblance between the CMF and IMF shapes in the outer Galaxy environments, suggesting that moderately low metallicity alone does not strongly reshape the high-mass CMF/IMF slope.
Comments16 pages, 4 figures, accepted by ApJL
