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HD 100546 System

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Exoplanetary Scratchpad

[SysBP Img]

HD 100546 (aka KR Muscae) is the first protostar found to have a circumstellar disk, 335 ly away in Musca. A Herbig Ae star, which are nearby young stars generally more massive than our sun, but are not yet main sequence stars powered by nuclear fusion. Its disk extends from 0.2 AU to 4 AU, followed by a gap, and then again at 13 AU to a few hundred AU. A large unconfirmed planet or brown dwarf, perhaps 20 MJ, or multiple planets, may be responsible for this gap. A clump of material in images pointed to the possibility of a planet 68 AU away, which was later directly detected and confirmed. This is youngest planet and the first exoplanet found that is still completely embedded in its formation disk without forming large gaps and is still forming. Astronomers believe they may have imaged a planet forming at 68 AU away, seen as a clump of material. One mystery is if a planet could have formed out that far from its star, or if it formed closer in and migrated outward. A second planet forming more interior planet may also have been imaged.

HD 100546 System Web PagesEdit


HD 100546 System In the NewsEdit

Dust Disk With Forming Planet Detected (Nov 2003)Edit

Possible Baby b Planet Spotted (Oct 2013)Edit

Planet b Confirmed (Jul 2015)Edit

Second Exoplanet Suspected (Dec 2015)Edit

See AlsoEdit

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