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A young star caught forming like a planet 5nvklj





A young star caught forming like a planet 9tpt39

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A young star caught forming like a planet

Dragon
Dragon
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A young star caught forming like a planet Empty A young star caught forming like a planet

Post by Dragon Fri Dec 14, 2018 11:51 pm

Astronomers have captured one of the most detailed views of a young star taken to date, and revealed an unexpected companion in orbit around it.

While observing the young star, astronomers led by Dr. John Ilee from the University of Leeds discovered it was not in fact one star, but two.

The main object, referred to as MM 1a, is a young massive star surrounded by a rotating disc of gas and dust that was the focus of the scientists' original investigation.

A faint object, MM 1b, was detected just beyond the disc in orbit around MM 1a. The team believe this is one of the first examples of a "fragmented" disc to be detected around a massive young star.

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A young star caught forming like a planet 334pu7m
Dragon
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A young star caught forming like a planet Empty Re: A young star caught forming like a planet

Post by Dragon Fri Dec 14, 2018 11:53 pm

A young star caught forming like a planet Ayoungstarca
Credit: J. D. Ilee / University of Leeds

Artist's impression of the disc of dust and gas surrounding the massive protostar MM 1a, with its companion MM 1b forming in the outer regions

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A young star caught forming like a planet 334pu7m
Dragon
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Post by Dragon Fri Dec 14, 2018 11:54 pm

A young star caught forming like a planet 1-ayoungstarca
Credit: J. D. Ilee / University of Leeds

Observation of the dust emission (green) and the cool gas around MM1a (red is receding gas, blue is approaching gas), indicating that the outflow cavity rotates in the same sense as the central accretion disc. MM1b is seen orbiting in the lower left.

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A young star caught forming like a planet 334pu7m
Dragon
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Post by Dragon Fri Dec 14, 2018 11:56 pm

A young star caught forming like a planet 2-ayoungstarca
Credit: J. D. Ilee / University of Leeds.

Observation of the dust emission (green) and hot gas rotating in the disc around MM 1a (red is receding gas, blue is approaching gas). MM 1b is seen the lower left.

Source / Image Courtesy


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A young star caught forming like a planet 334pu7m
Dragon
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Post by Dragon Fri Dec 14, 2018 11:57 pm



The constellation of Cassiopeia, named after a vain queen in Greek mythology, forms the easily recognisable 'W' shape in the night sky. The central point of the W is marked by a dramatic star named Gamma Cassiopeiae. The remarkable Gamma Cassiopeiae is a blue-white subgiant variable star that is surrounded by a gaseous disc.

This star is 19 times more massive and 65 000 times brighter than our Sun. It also rotates at the incredible speed of 1.6 million kilometres per hour — more than 200 times faster than our parent star.

This frenzied rotation gives it a squashed appearance. The fast rotation causes eruptions of mass from the star into a surrounding disk.


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