论文标题
部分可观测时空混沌系统的无模型预测
DDO68 C: the actual appearance of a ghost satellite dwarf through adaptive optics at the Large Binocular Telescope
论文作者
论文摘要
通过自适应光学（AO）成像与Soul+Luci乐器在大型双筒望远镜上我们能够解决，这是第一次，在富含气体的Galaxy DDO68 C中，个人明星中的个体明星C.该系统已经被建议与极端金属差的DDO68相互作用，但是它的性质是如此之高，因为它的景象是远处的，因为它的出现是一定的，因为它的出现是一定的，因为它的详细信息是一定的，因为它的明星之星是众所周知的，这是一个明星的界限。恒星人口和距离。在我们的研究中，我们将这位闯入者的明星变成了对DDO68 C更深入了解的机会，它将其用作AO校正的指导明星。尽管新数据不允许通过红色巨型分支尖端方法进行直接距离的测量，但是对解决的星级色彩数字图，档案galex fuv和nuv光度法的结合分析以及H $α$数据的组合分析提供了自符合的图片，其中DDO68 C在其中$ 13 mpc $ \ sim $ 13 mpc canspers and Compans compans untisting ddo ddo ddo。这些结果表明，DDO68是低质量矮人的独特情况，比麦哲伦云的质量较低，与三颗卫星（DDO68 C和两个先前确认的积聚系统）相互作用，对宇宙学模型提供了有用的限制，并且对其异常极低的金属性的潜在解释。
Through adaptive optics (AO) imaging with the SOUL+LUCI instrument at the Large Binocular Telescope we were able to resolve, for the first time, individual stars in the gas-rich galaxy DDO68 C. This system was already suggested to be interacting with the extremely metal poor dwarf DDO68, but its nature has remained elusive so far because of the presence of a bright foreground star close to its line of sight, that hampers a detailed study of its stellar population and distance. In our study, we turned this interloper star into an opportunity to have a deeper insight on DDO68 C, using it as a guide star for the AO correction. Although the new data do not allow for a direct distance measurement through the red giant branch tip method, the combined analysis of the resolved-star color-magnitude diagram, of archival GALEX FUV and NUV photometry, and of H$α$ data provides a self-consistent picture in which DDO68 C is at the same $\sim$13 Mpc distance as its candidate companion DDO68. These results indicate that DDO68 is a unique case of a low mass dwarf, less massive than the Magellanic Clouds, interacting with three satellites (DDO68 C and two previously confirmed accreting systems), providing useful constraints on cosmological models and a potential explanation for its anomalous extremely low metallicity.
