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arXiv 0909.1078astro-ph.COastro-ph.GA
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具有X射线准周期振荡的窄线塞弗特1星系RE J1034 +396的宿主星系

The host galaxy of a narrow-line Seyfert 1 galaxy RE J1034+396 with X-ray quasi-periodic oscillations

Wei-Hao Bian, Kai Huang

摘要:

利用简单的恒星星族合成,我们模拟了窄线Seyfert 1星系RE J1034+396的光谱中凸起恒星的贡献。我们发现它的球核速度色散是$67.7\pm 8$ \kms。超大质量黑洞(SMBH)的质量约为$(1-4)\times 10^6 \msun$,如果它遵循在静止星系中发现的众所周知的$\mbh-σ_*$关系。我们还从H $β$二阶矩中得到了SMBH的质量,这与从它的核球速度色散中得到的结果是一致的。$(1-4)\times 10^6 \msun$的SMBH质量表明,RE J1034+396的X射线准周期振荡(QPO)可以标度到在具有10个$\msun$黑洞的银河系黑洞双星中发现的27-108 Hz的高频QPO。利用不同年龄恒星群体的质量分布,我们发现过去0.1 Gyr的平均比恒星形成率(SSFR)为$0.0163\pm 0.0011$ $\rm Gyr^{-1}$,对数中的恒星质量为$10.155\pm 0.06$(太阳质量单位),当前恒星形成率为$0.23\pm 0.016 \msun \rm yr^{-1}$。RE J1034+396不遵循Chen等人提出的爱丁顿比与SSFR之间的关系,尽管在它们的关系中有较大的分散。我们还认为,大约7.0%的总\ha光度和50%的总\oii光度来自恒星形成过程。

英文摘要:

Using simple stellar population synthesis, we model the bulge stellar contribution in the optical spectrum of a narrow-line Seyfert 1 galaxy RE J1034+396. We find that its bulge stellar velocity dispersion is $67.7\pm 8$ \kms. The supermassive black hole (SMBH) mass is about $(1-4)\times 10^6 \msun$ if it follows the well-known $\mbh-σ_*$ relation found in quiescent galaxies. We also derive the SMBH mass from the H$β$ second moment, which is consistent with that from its bulge stellar velocity dispersion. The SMBH mass of $(1-4)\times 10^6 \msun$ implies that the X-ray quasi-periodic oscillation (QPO) of RE J1034+396 can be scaled to a high-frequency QPO at 27-108 Hz found in Galactic black hole binaries with a 10 $\msun$ black hole. With the mass distribution in different age stellar populations, we find that the mean specific star formation rate (SSFR) over past 0.1 Gyr is $0.0163\pm 0.0011$ $\rm Gyr^{-1}$, the stellar mass in the logarithm is $10.155\pm 0.06$ in units of solar mass, and the current star formation rate is $0.23\pm 0.016 \msun \rm yr^{-1}$. RE J1034+396 does not follow the relation between the Eddington ratio and the SSFR suggested by Chen et al., although a larger scatter in their relation. We also suggest that about 7.0% of the total \ha luminosity and 50% of the total \oii luminosity come from the star formation process.

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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