论文标题
M51-uls-1b：外部星系中的第一个行星候选者
M51-ULS-1b: The First Candidate for a Planet in an External Galaxy
论文作者
论文摘要
外部星系是否寄托行星系统？许多推理线表明答案必须是“是”。但是，在可预见的将来，我们自己的银河系中最成功的方法无法回答这个问题。我们报告了一种专注于明亮的X射线源（XRSS）的不同方法。 M51-uls-1b是第一个发现的行星，因为它会产生明亮的XRS的完整，短暂的日食。 M51-uls-1b的半径最大的半径比土星小。它在外部星系M51中绕过最亮的XRS之一，即漩涡式银河系，位于地球8.6兆帕的XRSS中。它是外部星系中行星的第一个候选者。 M51-uls-1的二元轨道年轻且庞大。二进制组件之一是恒星残留物，是中子星（NS）或黑洞（BH），另一个是巨大的恒星。现在，可以使用X射线交通来发现更多的外部星系中的行星以及在银河系内绕XRSS的行星。
Do external galaxies host planetary systems? Many lines of reasoning suggest that the answer must be 'yes'. In the foreseeable future, however, the question cannot be answered by the methods most successful in our own Galaxy. We report on a different approach which focuses on bright X-ray sources (XRSs). M51-ULS-1b is the first planet candidate to be found because it produces a full, short-lived eclipse of a bright XRS. M51-ULS-1b has a most probable radius slightly smaller than Saturn. It orbits one of the brightest XRSs in the external galaxy M51, the Whirlpool Galaxy, located 8.6 Megaparsecs from Earth. It is the first candidate for a planet in an external galaxy. The binary it orbits, M51-ULS-1, is young and massive. One of the binary components is a stellar remnant, either a neutron star (NS) or black hole (BH), and the other is a massive star. X-ray transits can now be used to discover more planets in external galaxies and also planets orbiting XRSs inside the Milky Way.
