The galaxy NGC 7020 displays an exotic hexagonal ringlike central structure with conspicuous ansae located at two opposite vertices and a tenuous external ring populated by H ii regions. Inside and around the hexagonal structure, Hα emission is also present at the inner disk. To characterize the population of the H ii regions, as well as their ionizing clusters, we imaged NGC 7020 with narrowband Hα and nearby continuum filters attached to GMOS-S installed on the Gemini South telescope. We found 202 H ii regions or complexes of H ii regions evenly distributed between the outer ring and the central disk The nucleus and ansae also present Hα emission. The equivalent width of the Hα line (W _Hα ) is systematically greater at the regions of the outer ring relative to those of the inner disk. We discuss the influence of the metallicity gradient of the disk and the upper limit of the masses of the initial mass function on W _Hα , and we conclude that the data are still consistent with the occurrence of a younger burst of H ii region formation in the outer ring. The central regions present more massive clusters, M ≥ 10⁶ M _⊙, than those of the outer ring (M ≤ 10⁶ M _⊙). Three clusters within 5″ of the nucleus present masses higher than 10⁸ M _⊙. The presence of diffuse Hα emission in the inner 5″ suggests gas flows in the nuclear region.

星系 NGC 7020 显示出奇特的六边形环状中央结构，显眼的 ansae 位于两个相对的顶点，以及一个由 H ii区域填充的细长外环。在六边形结构的内部和周围，内部圆盘也存在H α发射。为了表征 H ii区域的人口以及它们的电离星团，我们对 NGC 7020 进行了成像，该 NGC 7020 带有窄带 H α和附近的连续介质滤波器，该滤波器连接到安装在双子座南望远镜上的 GMOS-S。我们发现有202ħ II h的区域或络合物II区域外圈与所述中心盘的髓核和ansae也存在h的均匀分布的α排放。H α线的等效宽度( W _{H α} ) 在外环区域相对于内盘区域系统地更大。我们将讨论的磁盘和在初始质量函数的质量的上限的金属丰梯度的影响w ^ _{H ^ α} ，我们得出结论，数据仍然与H的较年轻的突发的发生一致的II区的形成在外圈。中央区域呈现更大规模的集群，中号≥10 ⁶ 中号 _⊙，比所述外环（的中号≤10 ⁶ 中号 _⊙）。原子核 5" 范围内的三个星团质量高于 10 ⁸ M _⊙。内部 5"中弥漫性 H α发射的存在表明气体在核区流动。