AU Microscopii (AU Mic) is a young red dwarf star located 31.7 light-years (9.7 parsecs) away – about 8 times as far as the closest star after the Sun. [5] The apparent visual magnitude of AU Microscopii is 8.73, [2] which is too dim to be seen with the naked eye.

2024年10月25日 · AU Microscopii b is a Neptune-like exoplanet that orbits a M-type star. Its mass is 20.12 Earths, it takes 8.5 days to complete one orbit of its star, and is 0.0649 AU from its star. Its discovery was announced in 2020.

2020年6月24日 · NASA’s Transiting Exoplanet Survey Satellite (TESS) and retired Spitzer Space Telescope have found a young Neptune-size world orbiting AU Microscopii, a cool, nearby M-type dwarf star surrounded by a vast disk of debris. The discovery makes the system a touchstone for understanding how stars and planets form and evolve.

New constraints on the planetary system around the young active star AU Mic. Two transiting warm Neptunes near mean-motion resonance. The stellar activity-rotation relationship revisited: Dependence of saturated and non-saturated X-ray emission regimes on stellar mass for late-type dwarfs. The Palomar/MSU nearby star spectroscopic survey. II.

A team of astronomers using SPIRou, the spectropolarimeter / high-precision velocimeter at the Canada-France-Hawaii Telescope (CFHT), measured the mass and density of a close-in Neptune-like planet orbiting the hugely-active newborn star AU Microscopii (AU Mic), showing that this warm planet, named AU Mic b, orbits in the equatorial plane of ...

2021年10月26日 · Here we present high-precision photometric follow-up observations of AU Mic b carried out with the CHEOPS space telescope. We aim to independently confirm the recently announced transiting planet AU Mic b and to improve its transit parameters and radius. The paper is organised as follows.

2020年6月23日 · Here we report observations of a planet transiting AU Mic. The transiting planet, AU Mic b, has an orbital period of 8.46 days, an orbital distance of 0.07 astronomical units, a radius of 0.4 Jupiter radii, and a mass of less than 0.18 Jupiter masses at 3 sigma confidence.

2021年8月4日 · AU Mic is a young planetary system with a resolved debris disc showing signs of planet formation and two transiting warm Neptunes near mean-motion resonances. Here we analyse three transits of AU...

2020年7月15日 · 科学家将这颗新发现的行星取名为“AU Mic b”，它实际上距离我们要更近，仅有31.9光年的距离，它的质量约为地球的58倍，科学家认为它看起来更像是海王星，大约比海王星还要大8%左右，围绕着AU Microscopii公转一周，大约需要8.5天的时间。

2020年6月24日 · We report measurements of the sky-projected spin-orbit angle for AU\,Mic\,b, a Neptune-size planet orbiting a very young (\,Myr) nearby pre-main sequence M dwarf star which also hosts a bright, edge-on, debris disk.