Title: Searching for star-forming dwarf galaxies in the Antlia cluster Show Chinese title

Title: 在Antlia星系团中搜索形成恒星的矮星系

Abstract: The formation and evolution of dwarf galaxies in clusters need to be understood, and this requires large aperture telescopes. In this sense, we selected the Antlia cluster to continue our previous work in the Virgo, Fornax, and Hydra clusters and in the Local Volume (LV). Because of the scarce available literature data, we selected a small sample of five blue compact dwarf (BCD) candidates in Antlia for observation. Using the Gemini South and GMOS camera, we acquired the Halpha imaging needed to detect star-forming regions in this sample. With the long-slit spectroscopic data of the brightest seven knots detected in three BCD candidates, we derived their basic chemical properties. Using archival VISTA VHS survey images, we derived K_S magnitudes and surface brightness profile fits for the whole sample to assess basic physical properties. FS90-98, FS90-106, and FS90-147 are confirmed as BCDs and cluster members, based on their morphology, K_S surface photometry, oxygen abundance, and velocity redshift. FS90-155 and FS90-319 did not show any H{\alpha} emission, and they could not be confirmed as dwarf cluster star-forming galaxies. Based on our data, we studied some fundamental relations to compare star forming dwarfs (BCDs and dIs) in the LV and in the Virgo, Fornax, Hydra, and Antlia clusters. Star-forming dwarfs in nearby clusters appear to follow same fundamental relations in the near infrared with similar objects in the LV, specifically the size-luminosity and the metallicity-luminosity, while other more fundamental relations could not be checked in Antlia due to lack of data. Show Chinese abstract

Abstract: 矮星系在星系团中的形成和演化需要被理解，这需要大口径望远镜。 从这个意义上说，我们选择了Antlia星系团来继续我们在室女座、福纳克斯和水蛇座星系团以及本地体积（LV）的先前工作。 由于可用的文献数据稀少，我们选择了Antlia中的五个蓝致密矮星（BCD）候选体进行观测。 使用Gemini South和GMOS相机，我们获得了检测该样本中恒星形成区域所需的Halpha成像。 利用在三个BCD候选体中检测到的最亮七个结的长缝光谱数据，我们推导了它们的基本化学性质。 使用档案VISTA VHS调查图像，我们推导了整个样本的K_S亮度和表面亮度轮廓拟合，以评估基本物理特性。 FS90-98、FS90-106和FS90-147基于其形态、K_S表面测光、氧丰度和速度红移被确认为BCD和星系团成员。 FS90-155和FS90-319没有显示出任何H{\alpha }发射，它们无法被确认为矮星系团恒星形成星系。 基于我们的数据，我们研究了一些基本关系，以比较本地体积（LV）和室女座、福纳克斯、水蛇座和Antlia星系团中的恒星形成矮星（BCDs和dIs）。 附近星系团中的恒星形成矮星在近红外中似乎遵循与LV中类似物体相同的基线关系，特别是大小-光度和金属量-光度关系，而其他更基本的关系由于数据不足在Antlia无法检查。