We investigate the relationship between black hole accretion and star formation in a sample of 453 $z\approx0.3$ type 1 active galactic nuclei (AGNs). We use available CO observations to demonstrate that the combination of nebular dust extinction and metallicity provides reliable estimates of the molecular gas mass even for the host galaxies of type 1 AGNs. Consistent with other similar but significantly smaller samples, we reaffirm the notion that powerful AGNs have comparable gas content as nearby star-forming galaxies and that AGN feedback does not deplete the host of cold gas instantaneously. We demonstrate that while the strong correlation between star formation rate and black hole accretion rate is in part driven by the mutual dependence of these parameters on molecular gas mass, the star formation rate and black hole accretion rate are still weakly correlated after removing the dependence of star formation rate on molecular gas mass. This, together with a positive correlation between star formation efficiency and black hole accretion rate, may be interpreted as evidence for positive AGN feedback.

中文翻译：

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黑洞吸积与附近发光 1 型活动星系的恒星形成率和恒星形成效率相关

我们在 453 个 $z\approx0.3$ 1 型活动星系核 (AGN) 的样本中研究了黑洞吸积与恒星形成之间的关系。我们使用可用的 CO 观测来证明星云尘埃消光和金属丰度的组合提供了分子气体质量的可靠估计，即使对于 1 型 AGN 的宿主星系也是如此。与其他类似但明显较小的样本一致，我们重申强大的 AGN 具有与附近的恒星形成星系相当的气体含量的概念，并且 AGN 反馈不会立即耗尽冷气体的宿主。我们证明，虽然恒星形成率和黑洞吸积率之间的强相关性部分是由这些参数对分子气体质量的相互依赖性驱动的，去除恒星形成率对分子气体质量的依赖后，恒星形成率与黑洞吸积率仍呈弱相关。这一点，连同恒星形成效率和黑洞吸积率之间的正相关，可以被解释为正 AGN 反馈的证据。