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New planet discovered in orbit of a young star of the Milky Way



  A second planet in the Beta Pictoris system
At least two giant planets, no more than 20 million years old, orbit the star (which is hidden): β Pictoris c, the next one that has just been discovered, and β Pictoris b is removed. The dust and gas disc can be seen in the background. Picture credits: P Rubini / AM Lagrange

A study released Monday revealed a second planet orbiting Beta Pictoris, a young star in our own galaxy.

"We are talking about a huge planet that is about 3,000 times as massive as Earth and 2.7 times as far from its star as Earth is from the Sun," said Anne-Marie Lagrange, astronomer at the National Center for Scientific Research in France, principal author of a study in Nature Astronomy .

The new planet β Pictoris c completes its orbit approximately every 1

,200 days. Like its big sister β Pictoris b, discovered in 2009 by Lagrange and her team, it's a gaseous giant.

Beta Pictoris is a newborn to the naked eye – with a mass nearly twice that of the Sun – and only 23 million years old.

The sun is more than 4.5 billion years old.

It is also relatively close, just over 63 light-years, and surrounded by a stellar dust disk.

This whirling halo of rubble and gas was the first such configuration captured in the image, making Beta Pictoris a star in the 1980s.

The best planetary system we know, "Lagrange told AFP.

Observations show that the two planets are still taking shape.

  A second planet in the Beta-Pictoris system.
The dust disk around β Pictoris and the position of the planets β Pictoris b and c Picture credits: P Rubini / AM Lagrange

β Pictoris c was discovered by analyzing 10-year high-resolution data obtained from La Silla Observatory in northern Chile, operated by the interstate European Southern Observatory.

According to scientists, β Pictoris b 2014 revolves at a furious speed of about 25 kilometers per second.

Located in the southern constellation Pictor – "The Painter & # 39; s Easel" – Beta Pictoris is the second brightest star in its constellation.


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Further information:
AT THE. Lagrange et al., References to an Additional Planet in the β Pictoris System, Nature Astronomy (2019). DOI: 10.1038 / s41550-019-0857-1

© 2019 AFP

Quote :
New planet discovered in orbit of the young Milky Way star (2019, 19 August)
retrieved on 19 August 2019
from https://phys.org/news/2019-08-planet-orbit-young-milky-star.html

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