论文标题
螺旋盘的最新形成托管祖细胞球形簇位于珀尔修斯最亮星系中心的球状簇：ii。祖细胞簇
Recent Formation of a Spiral Disk Hosting Progenitor Globular Clusters at the center of the Perseus Brightest Cluster Galaxy: II. Progenitor Globular Clusters
论文作者
论文摘要
我们解决了Holtzman等人发现的超级明星簇（SSC）的性质和起源。 （1992年）在NGC 1275中心的$ \ sim $$ 5 \，\ rm kpc $的半径内，这是Perseus群集中心的巨型椭圆星系。我们表明，与随后从该银河系中心发现的最多可达$ \ sim $ 30 \，\ rm kpc $的SSC人口相比，中央SSC人口具有最大的数量级，并且具有较浅的幂律斜坡的质量。 Furthermore, whereas the outer SSC population have ages spanning a few $\rm Myr$ to at least $\sim$$1\,\rm Gyr$, the central SSC population have ages strongly concentrated around $\sim$$500 \rm \, Myr$ with a $1\,σ$ dispersion of $\sim$$100\,\rm Myr$.这些SSC与“ Central Spiral”具有密切的空间和时间关系，该半径也具有以NGC 1275为中心的Radius $ \ sim $$ 5 \，\ rm kpc $，特征性的恒星年龄为$ \ sim $$ 150 \，\ rm myr $（Paper I）。我们认为，中央SSC种群和由残留冷却流沉积的气体形成的中央螺旋形成，首先形成SSC，然后形成中央螺旋$ \ sim $ \ sim $ 300 $ 300 $ -400 \，\ rm myr $ myr $的恒星体。中央SSC人口的年龄表明，他们能够在NGC 1275中心附近承受非常强大的潮汐场，从而使它们成为真正的祖细胞球形簇。显然，最近在巨大的椭圆星系的中心形成了托管祖细胞簇的螺旋盘。
We address the nature and origin of Super Star Clusters (SSCs) discovered by Holtzman et al. (1992) within a radius of $\sim$$5\,\rm kpc$ from the center of NGC 1275, the giant elliptical galaxy at the center of the Perseus Cluster. We show that, in contrast with the much more numerous population of SSCs subsequently discovered up to $\sim$$30\,\rm kpc$ from the center of this galaxy, the central SSC population have maximal masses an order of magnitude higher and a mass function with a shallower power-law slope. Furthermore, whereas the outer SSC population have ages spanning a few $\rm Myr$ to at least $\sim$$1\,\rm Gyr$, the central SSC population have ages strongly concentrated around $\sim$$500 \rm \, Myr$ with a $1\,σ$ dispersion of $\sim$$100\,\rm Myr$. These SSCs share a close spatial and temporal relationship with the "central spiral," which also has a radius $\sim$$5\,\rm kpc$ centered on NGC 1275 and a characteristic stellar age of $\sim$$150\,\rm Myr$ (Paper I). We argue that both the central SSC population and the central spiral formed from gas deposited by a residual cooling flow, with the SSCs forming first followed by the formation of the stellar body of the central spiral $\sim$$300$-$400\,\rm Myr$ later. The ages of the central SSC population imply that they are able to withstand very strong tidal fields near the center of NGC 1275, making them genuine progenitor globular clusters. Evidently, a spiral disk hosting progenitor globular clusters has recently formed at the center of a giant elliptical galaxy.
