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arXiv 2203.07702astro-ph.GA
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局域宇宙中AGN对其宿主星系形态性质的影响

Effect of AGN on the morphological properties of their host galaxies in the local Universe

T. Getachew-Woreta, M. Povic, J. Masegosa, J. Perea, Z. Beyoro-Amado, Isabel Marquez

摘要:

活动星系核的存在可能影响活动星系的形态分类。在本文中,我们提供了最详细的分析如何不同的活动星系核的贡献,从5%到75%,总的光学光可能会影响六个常用的形态参数和活动星系核宿主星系在z $\sim$ 0的最终分类。我们使用了一个超过2000个视觉分类的非活动星系的本地样本,以量化不同强度的明亮核点源的贡献如何影响形态参数,如:不对称性,亚伯拉罕浓度指数,基尼系数,M20光矩,平滑度和康塞利斯-伯沙迪浓度指数。我们发现,大多数的形态参数的影响AGN的贡献超过25%,晚型星系比早型的影响更大。我们发现,基尼系数,亚伯拉罕浓度指数和不对称性是最稳定的参数,即使活动星系核的贡献超过25%,相比康塞莱斯-伯沙迪浓度指数和M20光矩。在对活动星系核主星系进行分类时,应避免使用平滑度参数,或至少应与其他几个参数同时使用。

英文摘要:

The morphological classification of active galaxies may be affected by the presence of active galactic nuclei (AGN). In this paper, we provide the most detailed analysis on how different AGN contributions, from 5% to 75%, to the total optical light may affect six commonly used morphological parameters and the final classification of AGN host galaxies at z$\sim$0. We used a local sample of >2000 visually classified non-active galaxies, to quantify how the contribution of a bright nuclear point source of different intensity could affect morphological parameters such as: asymmetry, Abraham concentration index, Gini, M20 moment of light, smoothness, and Concelice-Bershady concentration index. We found that most of the morphological parameters are affected by AGN contributions above 25%, with late-type galaxies being more affected than early-types. We found that Gini, Abraham concentration index and asymmetry are the most stable parameters even for AGN contributions above 25%, in comparison to Concelice-Bershady concentration index and M20 moment of light. Smoothness parameter shall be avoided when classifying AGN host galaxies, or at least it shall be used simultaneously in combination with several other parameters.

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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