arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2004.02250astro-ph.GA
收藏

AGN对宿主星系形态参数贡献的研究

Study of AGN contribution on morphological parameters of their host galaxies

Tilahun Getachew-Woreta, Mirjana Pović, Josefa Masegosa, Jaime Perea, Zeleke Beyoro-Amado, Isabel Marquez Perez

摘要:

我们测试了活动星系核的贡献(总流量的5% - 75%)可能会影响星系分类中常用的不同形态参数。我们在$z$,$sim$,0和对应于COSMOS场的更高红移处进行了所有分析。使用本地训练样本的$>$,2000视觉分类的星系,我们进行了所有的测量和没有中央源和量化的贡献,一个明亮的核点源可以影响不同的形态参数,如:亚伯拉罕和康塞利斯-伯沙迪指数,基尼系数,不对称性,$M20$时刻的光,平滑度。我们发现,浓度指数是不太敏感的红移和亮度相比,其他参数。我们还发现,所有参数的变化与活动星系核的贡献显着。在$z$ $\sim$ 0,活动星系核贡献的10%不会对形态分类产生显著影响,但对于活动星系核贡献的$\ge$ 25%,晚型螺旋遵循椭圆星系的参数范围,因此可能被错误分类为早型。

英文摘要:

We tested how the AGN contribution (5% - 75% of the total flux) may affect different morphological parameters commonly used in galaxy classification. We carried out all analysis at $z$,$sim$,0 and at higher redshifts that correspond to the COSMOS field. Using a local training sample of $>$,2000 visually classified galaxies, we carried out all measurements with and without the central source and quantified how the contribution of a bright nuclear point source could affect different morphological parameters, such as: Abraham and Concelice-Bershady indices, Gini, Asymmetry, $M20$ moment of light, and Smoothness. We found that concentration indexes are less sensitive to both redshift and brightness in comparison to the other parameters. We also found that all parameters change significantly with AGN contribution. At $z$$\sim$0, up to a 10% of AGN contribution the morphological classification will not be significantly affect, but for $\ge$25% of AGN contribution late-type spirals follow the range of parameters of elliptical galaxies and can therefore be misclassified early types.

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。

↑