银河系碰撞碎片中的质量缺失
Missing Mass in Collisional Debris from Galaxies
摘要：
大质量星系的碰撞残骸中可以形成有小块的矮星系。理论模型预测，与经典星系相反，它们应该没有非重子暗物质。分析所观察到的气体运动学的帮助下，这样的回收星系的数值模型，我们证明，它们确实包含一个巨大的黑暗成分约两倍的可见物质。在标准的宇宙学框架内，这一结果很可能表明存在大量看不见的、可能是冷的分子气体。这种额外的质量应该存在于它们的祖先螺旋星系的盘中，占所谓失踪重子的重要部分。
英文摘要：
Recycled dwarf galaxies can form in the collisional debris of massive galaxies. Theoretical models predict that, contrary to classical galaxies, they should be free of non-baryonic Dark Matter. Analyzing the observed gas kinematics of such recycled galaxies with the help of a numerical model, we demonstrate that they do contain a massive dark component amounting to about twice the visible matter. Staying within the standard cosmological framework, this result most likely indicates the presence of large amounts of unseen, presumably cold, molecular gas. This additional mass should be present in the disks of their progenitor spiral galaxies, accounting for a significant part of the so-called missing baryons.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
