A low-luminosity type-1 QSO sample: II. Tracing circumnuclear star formation in HE 1029-1831 with SINFONI
A low-luminosity type-1 QSO sample: II. Tracing circumnuclear star formation in HE 1029-1831 with SINFONI
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低亮度 1 型 QSO 样本：II。
DOI：
10.1051/0004-6361/201425261
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
I. Grenoble
中科院分区：
文献类型：
--
作者：
G. Busch;S. Smaji'c;J. Scharwachter;A. Eckart;M. Valencia;L. Moser;B. Husemann;M. Krips;J. Z. U. O. Cologne;M. Bonn;O. Paris;Eso ;I. Grenoble
环核星星的形成和活动星系核的反馈被认为在星系演化过程中起着至关重要的作用。低光度类星体（LLQSO）样本包含了99个最近的活动星系核（z <= 0.06），填补了活动星系核与高红移类星体之间的差距，这对于理解活动星系核的红移演化是必不可少的。本文给出了LLQSO HE 1029 - 1831近红外H + K积分场谱的实验结果。线图显示电离的氢气位于恒星棒内的旋臂和环核环中。线通量和诊断线比率表明最近或正在进行的星星形成的环核区域和存在的年轻和中年恒星群体的隆起。特别是，我们在环核区域发现了强烈的星暴痕迹，它大约在1亿年前开始，但现在已经下降到最大强度的一小部分。我们估计了星系的动力学核球质量，发现该星系遵循已发表的M_BH-M_bulge关系。然而，用BUDDA对K波段图像进行的球盘分解表明，HE 1029 - 1831并不遵循不活跃星系的M_BH-L_bulge关系。我们的结论是，该源中不活跃星系的M_BH-L_bulge关系偏离是由年轻的恒星种群引起的，而不是由质量不足的黑洞引起的。
Circumnuclear star formation and AGN feedback is believed to play a critical role in the context of galaxy evolution. The low-luminosity QSO (LLQSO) sample that contains 99 of the closest AGN with redshift z<=0.06 fills the gap between the local AGN population and high-redshift QSOs that is essential to understand the AGN evolution with redshift. In this paper, we present the results of near-infrared H+K-integral field spectroscopy of the inner kiloparsecs of the LLQSO HE 1029-1831 with SINFONI. Line maps show that ionized hydrogen gas is located in spiral arms within the stellar bar and in a circumnuclear ring. Line fluxes and diagnostic line ratios indicate recent or ongoing star formation in the circumnuclear region and the presence of young and intermediate-age stellar populations in the bulge. In particular, we find traces of an intense starburst in the circumnuclear region that has begun around 100 Myr ago but has declined to a fraction of the maximum intensity now. We estimate the dynamical bulge mass and find that the galaxy follows published M_BH-M_bulge relations. However, bulge-disk decomposition of the K-band image with BUDDA reveals that HE 1029-1831 does not follow the M_BH-L_bulge relations of inactive galaxies. We conclude that the deviation from M_BH-L_bulge relations of inactive galaxies in this source is rather caused by young stellar populations and not by an undermassive black hole.
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影响因子：
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