神秘的马林1号的中心区域
The central region of the enigmatic Malin 1
摘要：
马林1是一类巨大的低表面星系，即使在今天仍然让我们感到惊讶。HST/F814 W观测表明，马林1的中心区域更像是一个正常的SB 0/a星系，而盘的其余部分则具有低表面亮度系统的特征。AstroSat/UVIT的观测表明，星盘上分散着最近的恒星形成活动，特别是沿着旋臂。中央的9”（$\sim 14$ kpc）区域，与银河系的恒星盘大小相似，有许多远紫外团块-表明最近的恒星形成活动。高分辨率的UVIT/F154 W图像显示了棒区域（$\sim 4$ kpc）内的远紫外辐射-这表明棒中存在热的年轻恒星。这些来自棒区的年轻恒星可能是产生SDSS光谱中H $α$ [OII]等强发射线的原因。Malin 1B是一个矮早型星系，与中心区域相互作用，可能是导致该星系近期恒星形成活动的原因。
英文摘要：
Malin 1, being a class of giant low surface galaxies, continues to surprise us even today. The HST/F814W observation has shown that the central region of Malin 1 is more like a normal SB0/a galaxy, while the rest of the disk has the characteristic of a low surface brightness system. The AstroSat/UVIT observations suggest scattered recent star formation activity all over the disk, especially along the spiral arms. The central 9" ($\sim 14$ kpc) region, similar to the size of the Milky Way's stellar disk, has a number of far-UV clumps - indicating recent star-formation activity. The high resolution UVIT/F154W image reveals far-UV emission within the bar region ($\sim 4$ kpc) - suggesting the presence of hot, young stars in the bar. These young stars from the bar region are perhaps responsible for producing the strong emission lines such as H$α$, [OII] seen in the SDSS spectra. Malin 1B, a dwarf early-type galaxy, is interacting with the central region and probably responsible for inducing the recent star-formation activity in this galaxy.
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