Title: The interplay between Active Galactic Nuclei and Ram-pressure stripping: spatially resolved gas-phase abundances of stripped and undisturbed galaxies Show Chinese title

Title: 活动星系核与冲压剥离的相互作用：被剥离星系和未扰动星系的空间分辨的气体相丰度

Abstract: The gas-phase oxygen abundance of the circumnuclear regions around supermassive black holes (SMBH) has been claimed to be affected by the presence of an Active Galactic Nucleus (AGN). However, there is currently no consensus on the mechanism driving this effect. In this work, we explore whether the interplay between AGN activity and the Ram Pressure Stripping (RPS) can influence the metallicity distributions of nearby (z < 0.07) galaxies. To this aim, we measure the spatially resolved gas-phase oxygen abundances of 10 stripped AGN hosts from the GASP survey, as well as 52 AGN hosts found in the field, which are undisturbed by the effects of ram pressure, drawn from the MaNGA DR15. We find that the metal distributions in these two samples do not differ significantly. Only 2 out of the 10 RP-stripped AGNs present lower oxygen abundances at any given radius than the rest of the AGN sample. Overall, this result highlights that the AGN-RPS interplay does not play a significant role in shaping the metallicity distributions of stripped galaxies within 1.5 times the galaxy's effective radius (r < 1.5 Re). However, larger samples are required to draw more definitive conclusions. By including a control sample of SF galaxies, we observe that the AGN hosts are more metal-enriched than SF galaxies at any given radius. More than that, the steepness of the gradients in the nuclear regions (r < 0.5 Re) is greater in AGN hosts than in SF galaxies. These results favor the hypothesis that the AGN activity is causing metal pollution in the galaxy's nuclear regions. Show Chinese abstract

Abstract: 超大质量黑洞（SMBH）周围核区的气相氧丰度曾被声称受到活动星系核（AGN）存在的影响。然而，目前尚未就驱动这一效应的机制达成共识。在这项工作中，我们探讨了AGN活动与Ram压力剥离（RPS）之间的相互作用是否会影响附近（z < 0.07）星系的金属分布。为此，我们测量了来自GASP巡天的10个被剥离AGN宿主的径向分辨气相氧丰度，以及来自MaNGA DR15的52个未受ram压力影响的场星AGN宿主。我们发现这两个样本的金属分布没有显著差异。只有2个RP剥离的AGN在其任何给定半径处呈现比其他AGN样本更低的氧丰度。总体而言，这一结果表明AGN-RPS相互作用在塑造有效半径1.5倍范围内被剥离星系的金属丰度分布方面并不起重要作用。然而，需要更大的样本才能得出更明确的结论。通过加入一个恒星形成（SF）星系对照样本，我们观察到在任何给定半径上，AGN宿主比SF星系更具金属富集性。更重要的是，在核区（r < 0.5 Re）梯度的陡峭程度在AGN宿主中大于在SF星系中。这些结果支持AGN活动正在导致星系核区金属污染的假设。