Testing the evolution of correlations between supermassive black holes and their host galaxies using eight strongly lensed quasars
Testing the evolution of correlations between supermassive black holes and their host galaxies using eight strongly lensed quasars
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DOI：
10.1093/mnras/staa2992
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发表时间：
2020-05
影响因子：
4.8
通讯作者：
Xuheng Ding;T. Treu;S. Birrer;A. Agnello;D. Sluse;C. Fassnacht;M. Auger;Kenneth C. Wong;S. Suyu;T. Morishita;C. Rusu;A. Galan
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作者：
Xuheng Ding;T. Treu;S. Birrer;A. Agnello;D. Sluse;C. Fassnacht;M. Auger;Kenneth C. Wong;S. Suyu;T. Morishita;C. Rusu;A. Galan
利用高红移活动星系核研究超大质量黑洞（$\mathcal {M}_{\rm BH}$）质量与其活动星系性质之间的相关性的主要挑战之一是仪器分辨率。强大的透镜放大率有效地提高了仪器分辨率，从而有助于解决这一挑战。在这项工作中，我们研究了八个强透镜活动星系核与深哈勃空间望远镜成像，使用透镜建模代码lenstronomy重建的图像的来源。利用重建的宿主星系亮度，我们根据恒星布居模型推断了宿主星系的恒星质量。$\mathcal {M}_{\rm BH}$是使用标准方法从宽发射谱线估计的。我们的研究结果与最近的工作的基础上非透镜活动星系核，展示了使用强透镜活动星系核的潜力，以扩大研究的相关性，以更高的红移。目前，透镜活动星系核的样本量很小，因此它们主要提供与非透镜活动星系核分辨率相关的系统误差的一致性检查。然而，通过地面和空间宽场调查的专门搜索，已知的透镜活动星系核的数量预计将在未来几年内急剧增加，它们可能成为黑洞和星系共同进化的关键诊断。
One of the main challenges in using high-redshift active galactic nuclei (AGNs) to study the correlations between the mass of a supermassive black hole ($\mathcal {M}_{\rm BH}$) and the properties of its active host galaxy is instrumental resolution. Strong lensing magnification effectively increases instrumental resolution and thus helps to address this challenge. In this work, we study eight strongly lensed AGNs with deep Hubble Space Telescope imaging, using the lens modelling code lenstronomy to reconstruct the image of the source. Using the reconstructed brightness of the host galaxy, we infer the host galaxy stellar mass based on stellar population models. $\mathcal {M}_{\rm BH}$ are estimated from broad emission lines using standard methods. Our results are in good agreement with recent work based on non-lensed AGNs, demonstrating the potential of using strongly lensed AGNs to extend the study of the correlations to higher redshifts. At the moment, the sample size of lensed AGNs is small and thus they provide mostly a consistency check on systematic errors related to resolution for non-lensed AGNs. However, the number of known lensed AGNs is expected to increase dramatically in the next few years, through dedicated searches in ground- and space-based wide-field surveys, and they may become a key diagnostic of black holes and galaxy co-evolution.