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arXiv 1606.04067astro-ph.GA
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一个近乎裸露的超大质量黑洞

A Nearly Naked Supermassive Black Hole

J. J. Condon, Jeremy Darling, Y. Y. Kovalev, L. Petrov

摘要:

在对不在星系核中的超大质量黑洞(SMBH)进行系统搜索的过程中,我们发现了紧凑的对称射电源B3 1715+425,其发射线星系偏离红移$z = 0.1754$星系团ZwCl 8193中最亮的星系团(BCG)的核约8.5 kpc。B3 1715+425太亮(在观测频率7.6 GHz时的亮度温度为$\sim 3 \times 10^{10}$ K),也太亮(1.4 GHz光度为$\sim 10^{25}$ W/Hz),除了SMBH之外,其他星系都无法提供能量,但它的宿主星系要小得多($\sim 0.9$ kpc $\times$ 0.6 kpc半峰间全宽),光学上也比其他射电星系要暗(R波段绝对星等$\sim -18.2$)。它相对于BCG的高径向速度$\sim 1860$ km/s,延伸回BCG核的连续电离尾流,以及周围的碎片表明射电星系在穿过BCG核时被潮汐撕碎,留下一个几乎裸露的超大质量黑洞,以空间速度PDMATHAMT km/s逃离BCG。这个射电星系的质量相当于$< 6 \times 10^9$太阳质量,红外线光度$\sim 3 \times 10^{11}$太阳光度接近其尘埃爱丁顿极限,因此它很容易受到辐射反馈的进一步质量损失。

英文摘要:

During a systematic search for supermassive black holes (SMBHs) not in galactic nuclei, we identified the compact symmetric radio source B3 1715+425 with an emission-line galaxy offset ~ 8.5 kpc from the nucleus of the brightest cluster galaxy (BCG) in the redshift $z = 0.1754$ cluster ZwCl 8193. B3 1715+425 is too bright (brightness temperature $\sim 3 \times 10^{10}$ K at observing frequency 7.6 GHz) and too luminous (1.4 GHz luminosity $\sim 10^{25}$ W/Hz) to be powered by anything but a SMBH, but its host galaxy is much smaller ($\sim 0.9$ kpc $\times$ 0.6 kpc full width between half-maximum points) and optically fainter (R-band absolute magnitude $\sim -18.2$) than any other radio galaxy. Its high radial velocity $\sim 1860$ km/s relative to the BCG, continuous ionized wake extending back to the BCG nucleus, and surrounding debris indicate that the radio galaxy was tidally shredded passing through the BCG core, leaving a nearly naked supermassive black hole fleeing from the BCG with space velocity $> 2000$ km/s. The radio galaxy has mass $< 6 \times 10^9$ solar masses and infrared luminosity $\sim 3 \times 10^{11}$ solar luminosities close to its dust Eddington limit, so it is vulnerable to further mass loss from radiative feedback.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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