论文标题
当地宇宙中的星形形成和AGN反馈：结合Lofar和漫画
Star Formation and AGN Feedback in the Local Universe: Combining LOFAR and MaNGA
论文作者
论文摘要
活性银河核（AGN）对其宿主星系的影响（尤其是它们的恒星形成水平）仍然是银河发展的关键问题之一。银河进化的成功宇宙学模型需要将AGN释放的一部分能量重新分布到星际培养基中，以重现观察到的恒星质量和光度函数，并防止形成过度质量的星系。观察结果已经证实，在各个阶段，Radio-AGN种群在能量上能够加热和重新分布气体，但是，AGN增强或淬火星形成的直接证据仍然很少。通过现代，深度无线电调查和大型积分田间光谱法（IFS）调查，我们可以分别检测出AGN喷气机的fain依者同步器发射，并准确探测星系的星形形成性能。在本文中，我们将来自低频阵列两米天空调查的数据与来自最大的光学IFS调查之一的数据结合在一起，在Apache Point天文台绘制附近的星系绘制了附近的星系，以探测307个本地（Z $ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ 0.15）的星系的星系。我们将结果与稳健的非活动星系的控制样本进行了比较，该样本与恒星质量，红移，视觉形态以及rdagn宿主的倾斜度相匹配。我们发现RDAGN和对照星系具有广泛的SFR分布，通常位于星形的主要序列下方，并且具有负恒星的轻度年龄梯度。这些结果表明，基于当前活动选择的AGN不负责抑制其宿主星系的恒星形成。相反，我们的结果支持无线电AGN在本地宇宙中的维护模式角色。
The effect of Active Galactic Nuclei (AGN) on their host galaxies -- in particular their levels of star formation -- remains one of the key outstanding questions of galaxy evolution. Successful cosmological models of galaxy evolution require a fraction of energy released by an AGN to be redistributed into the interstellar medium to reproduce the observed stellar mass and luminosity function and to prevent the formation of over-massive galaxies. Observations have confirmed that the radio-AGN population is energetically capable of heating and redistributing gas at all phases, however, direct evidence of AGN enhancing or quenching star formation remains rare. With modern, deep radio surveys and large integral field spectroscopy (IFS) surveys, we can detect fainter synchrotron emission from AGN jets and accurately probe the star-forming properties of galaxies, respectively. In this paper, we combine data from the LOw Frequency ARray Two-meter Sky Survey with data from one of the largest optical IFS surveys, Mapping Nearby Galaxies at Apache Point Observatory to probe the star-forming properties of 307 local (z $<$ 0.15) galaxies that host radio-detected AGN (RDAGN). We compare our results to a robust control sample of non-active galaxies that each match the stellar mass, redshift, visual morphology, and inclination of a RDAGN host. We find that RDAGN and control galaxies have broad SFR distributions, typically lie below the star-forming main-sequence, and have negative stellar light-weighted age gradients. These results indicate that AGN selected based on their current activity are not responsible for suppressing their host galaxies' star formation. Rather, our results support the maintenance mode role that radio AGN are expected to have in the local Universe.
