论文标题
VLA在19个大型球状簇中的中等质量黑洞的限制
VLA Limits on Intermediate-Mass Black Holes in 19 Massive Globular Clusters
论文作者
论文摘要
NSF的Karl G. \ Jansky非常大的阵列（VLA）在3〜cm处使用，以在NGC \，3115，3115的Globular Star簇（GCS）中从中间质量黑洞（IMBHS）中寻找积聚签名，在3115年，早期的Galaxy，An An-Type Galaxy的距离为9.4 mpc。 19具有恒星质量$ m _ {\ star} \ sim（1.1-2.7）\ times 10^6〜m_ \ odot $，带有平均$ \ overline {m _ {\ star}} \ sim 1.8 \ sim 1.8 \ times 10^6〜m_ \ odot $。没有检测到。将IMBH积聚模型应用于单个GC及其无线电堆栈。无线电堆叠的GC具有IMBH质量$ \上线{m _ {\ rm imbh}}} <1.7 \ times 10^5〜m_ \ odot $和质量分数$ \ edline {m _ {\ rm imbh}}}}}}}}} / \ ylimine {m _ limition {m _ pline {m _}约2.5。后一个极限与某些剥离的核的极端形成对比，表明NGC \中的一组堆叠的GC，3115不是这样的核。单个GCS的无线电照明对应于X射线照明$ l _ {\ rm x} <（3.3-10）\ times 10^{38} $ erg〜s $^{ - 1} $，其因子约为2.5不确定。 GC中推定的IMBH预测的这些限制与现存的{\ em chandra}观测值一致。最后，使用下一代VLA（NGVLA）进行的模拟观察表明，可以在仅在无线电搜索中检测到GCS中IMBHS的增生特征，但由于GCS中的X射线二进制文件的混淆而在仅X射线搜索中进行了疏忽检测。
The NSF's Karl G.\ Jansky Very Large Array (VLA) was used at 3~cm to search for accretion signatures from intermediate-mass black holes (IMBHs) in 19 globular star clusters (GCs) in NGC\,3115, an early-type galaxy at a distance of 9.4 Mpc. The 19 have stellar masses $M_{\star} \sim (1.1 - 2.7) \times 10^6~M_\odot$, with a mean $\overline{M_{\star}} \sim 1.8 \times 10^6~M_\odot$. None were detected. An IMBH accretion model was applied to the individual GCs and their radio stack. The radio-stacked GCs have an IMBH mass $\overline{M_{\rm IMBH}} < 1.7 \times 10^5~M_\odot$ and mass fraction $\overline{M_{\rm IMBH}} / \overline{M_{\star}} < 9.5\%$, with each limit being uncertain by a factor of about 2.5. The latter limit contrasts with the extremes of some stripped nuclei, suggesting that the set of stacked GCs in NGC\,3115 is not a set of such nuclei. The radio luminosities of the individual GCs correspond to X-ray luminosities $L_{\rm X} < (3.3 - 10) \times 10^{38}$ erg~s$^{-1}$, with a factor of about 2.5 uncertainty. These limits predicted for putative IMBHs in the GCs are consistent with extant {\em Chandra} observations. Finally, a simulated observation with a next-generation VLA (ngVLA) demonstrates that accretion signatures from IMBHs in GCs can be detected in a radio-only search, yet elude detection in an X-ray-only search due to confusion from X-ray binaries in the GCs.
