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arXiv 1204.0144astro-ph.CO
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SMBH与球状星团系统速度色散的M -σ关系

M - sigma relation between SMBHs and the velocity dispersion of globular cluster systems

Raphael Sadoun, Jacques Colin

摘要:

我们发现中心超大质量黑洞的质量MBH与其宿主星系的球状星团系统的速度色散σ_GC相关。这扩展了著名的MBH-sigma_sph关系之间的黑洞质量和速度分散的主机球状组件。我们编译了13个系统样本的MBH和sigma_GC的已发表测量值,并发现log(MBH)= alpha + beta log(sigma_GC/200)的关系,其中alpha = 8.63 \pm 0.09,beta = 3.76 \pm 0.52。我们也认为蓝色(贫金属)和红色(富含金属)球状星团子种群分别获得了令人惊讶的紧密相关性,仅使用红色星团的速度色散sigma_GC^red,α = 8.73 \pm 0.09和β = 3.84 \pm 0.52,以及与MBH的eps_0 = 0.27 dex相比,内部散射eps_0 = 0.22 dex。sigma_sph我们的样本。我们用我们的MBH - sigma_GC关系估计了5个测量了sigma_GC^red的星系的中心黑洞质量。

英文摘要:

We find evidence that the mass MBH of central supermassive black holes (SMBHs) correlates with the velocity dispersion sigma_GC of globular cluster systems of their host galaxies. This extends the well-known MBH - sigma_sph relation between black hole mass and velocity dispersion of the host spheroidal component. We compile published measurements of both MBH and sigma_GC for a sample of 13 systems and find the relation log(MBH) = alpha + beta log(sigma_GC/200) with alpha = 8.63 \pm 0.09 and beta = 3.76 \pm 0.52. We also consider blue (metal-poor) and red (metal-rich) globular clusters sub-populations separately and obtain a surprisingly tight correlation using only the velocity dispersion sigma_GC^red of the red clusters with alpha = 8.73 \pm 0.09 and beta = 3.84 \pm 0.52 and an intrinsic scatter eps_0 = 0.22 dex compared to eps_0 = 0.27 dex for the MBH - sigma_sph of our sample. We use our MBH - sigma_GC relation to estimate the central black hole mass in five galaxies for which sigma_GC^red is measured.

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