论文标题
部分可观测时空混沌系统的无模型预测
Peekaboo: the extremely metal poor dwarf galaxy HIPASS J1131-31
论文作者
论文摘要
矮人不规则的星系嘻哈J1131-31被发现是低红移时的HI排放来源，我们称其为亮星，我们称其为peekaboo。银河系在带有哈勃太空望远镜的图像中解析为恒星，导致距离估计为6.8+-0.7 MPC。与南部非洲大型望远镜进行的光谱光学观察结果表明，HIPASS J1131-31是最极具金属的贫困星系之一，其气相丰度12+log（O/H）= 6.99+-0.16通过直接[OIII] 4363 LINE] 4363 LINE-4363 LINE MATICE和6.87+-0.0.077 dex dex dex dex dex。与年轻人口在颜色标记图中的特征相比，系统的红色巨型分支很脆弱，这引起了人们的猜测，即星系中的恒星形成仅在最后几个GYR中才开始。
The dwarf irregular galaxy HIPASS J1131-31 was discovered as a source of HI emission at low redshift in such close proximity of a bright star that we call it Peekaboo. The galaxy resolves into stars in images with Hubble Space Telescope, leading to a distance estimate of 6.8+-0.7 Mpc. Spectral optical observations with the Southern African Large Telescope reveal HIPASS J1131-31 to be one of the most extremely metal-poor galaxies known with the gas-phase oxygen abundance 12+log(O/H) = 6.99+-0.16 dex via the direct [OIII] 4363 line method and 6.87+-0.07 dex from the two strong line empirical methods. The red giant branch of the system is tenuous compared with the prominence of the features of young populations in the color-magnitude diagram, inviting speculation that star formation in the galaxy only began in the last few Gyr.
