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You’ll be able to’t choose a star by its protoplanetary disc

July 14, 2025
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You’ll be able to’t choose a star by its protoplanetary disc
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This picture tells the story of redemption for one lonely star. The younger star MP Mus (PDS 66) was regarded as on their lonesome within the Universe, surrounded by nothing however a featureless band of gasoline and mud known as a protoplanetary disc. Normally, the fabric inside a protoplanetary disc condenses to type new planets across the star, leaving massive gaps the place the gasoline and mud was. These options are seen in nearly each disc – however not in MP Mus’s.

When astronomers first noticed it with the Atacama Giant Millimeter/submillimeter Array (ALMA), they noticed a easy, planet-free disc, proven right here in the best picture. The workforce, led by Álvaro Ribas, an astronomer on the College of Cambridge, UK, gave this star one other likelihood and re-observed it with ALMA at longer wavelengths that peer even deeper into the protoplanetary disc than earlier than. These new observations, proven within the left picture, revealed a niche and a hoop that had been obscured in earlier observations, suggesting that MP Mus may need firm in any case.

In the meantime, one other piece of the puzzle was being revealed in Germany as Miguel Vioque, an astronomer on the European Southern Observatory, studied this similar star with the European Area Company’s (ESA’s) Gaia mission. Vioque observed one thing suspicious – the star was wobbling. A little bit of gravitational detective work, along with insights from the brand new disc constructions revealed by ALMA, confirmed that this movement could possibly be defined by the presence of a gasoline big exoplanet. 

Each groups introduced their joint leads to a new paper published in Nature Astronomy. In what they describe as “a stupendous merging of two teams approaching the identical object from totally different angles”, they present that MP Mus isn’t so boring in any case.

[Image description: This is an observation from the ALMA telescope, showing two versions (side-by-side) of a protoplanetary disc. Both discs are bright, glowing yellow-orange objects with a diffused halo against a dark background. The right disc is more smooth and blurry looking. The left disc shows more detail, for example gaps and rings within it.]

Source: ESO



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