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Exoplanetary Scratchpad

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Infant binary star system 450 ly away in the Scorpius-Centaurus association. Contains two dust disks. The inner one reaches out to the distance of Saturn while the outer one begins 14 times further out. Planets are thought to cause the gap between them. Infant gas giant planets have been observed for the first time consuming gas from nearby dust rings, with streams of material connecting them. Gas from the outer disk spirals inward towards the planets, then gets past the planet and enters in inner disk. Streams like this have long been theorized, but this is the first time they were observed. One of the planets is forming 90 AU away. There is little chance of observing the planets themselves, as they are embedded in opaque gas. An arc of dust was detected. Carbon monoxide was not detected by the dust because it has frozen onto the solid surface of dust particles. This is an important planetary formation process, as "snowballs" stick to each other well. It is not clear if a planet or cometary belt will form from this arc.

HD 142527 System Web Pages[]

HD 142527 System In the News[]

Streams Detected (Jan 2013)[]

Gas Freezing Onto Grains (2016)[]

Also referenced: HL Tau System

See Also[]