论文标题
全天毒哈勃仙女座财政部：三角形扩展区域（Phatter）。 iii。 M33中年轻恒星簇的质量功能
The Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER). III. The Mass Function of Young Star Clusters in M33
论文作者
论文摘要
我们测量了本地组Galaxy M33的星簇质量函数。我们使用从Panchromatic Hubble andromeda国库中选择的恒星群集的目录：三角形扩展区（Phatter）调查。我们用$ \ rm 7.0 <log（/yr）<8.5 $和log（$ m/m _ {\ odot} $）$> $ 3.0分析了711个M33中的711簇，并从颜色 - 磁性图拟合到单个星星。 M33群集质量函数可以通过schechter功能与电源法斜率$α= -2.06^{+0.14} _ { - 0.13} $和截断质量日志（$ M_C/M _ {\ odot} $ = 4.24^{+0.16} _ {+0.16} $。数据显示了高质量截断的有力证据，因此强烈支持Schechter功能符合纯粹的功率定律。 M33的截断质量与先前确定的$ m_c $之间的线性趋势与星形速率表面密度（\ sigsfr）一致。我们还探讨了单个群集质量不确定性对派生质量功能参数的影响，并找到证据表明大簇质量不确定性可能会偏向一个Sigma水平上拟合质量功能的截断质量。
We measure the star cluster mass function for the Local Group galaxy M33. We use the catalog of stellar clusters selected from the Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER) survey. We analyze 711 clusters in M33 with $\rm 7.0 < log(Age/yr) < 8.5$, and log($M/M_{\odot}$) $>$ 3.0 as determined from color-magnitude diagram fits to individual stars. The M33 cluster mass function is best described by a Schechter function with power law slope $α= -2.06^{+0.14}_{-0.13}$, and truncation mass log($M_c/M_{\odot}$) $= 4.24^{+0.16}_{-0.13}$. The data show strong evidence for a high-mass truncation, thus strongly favoring a Schechter function fit over a pure power law. M33's truncation mass is consistent with the previously identified linear trend between $M_c$, and star formation rate surface density, \SigSFR. We also explore the effect that individual cluster mass uncertainties have on derived mass function parameters, and find evidence to suggest that large cluster mass uncertainties have the potential to bias the truncation mass of fitted mass functions on the one sigma level.
