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A massive planet circles a huge star doomed to explode
RESEARCH HIGHLIGHT .
15 August 2022 .
A massive planet circles a huge star doomed to explode .
Confirmation of a second planet around the star μ 2 Scorpii would indicate the first planetary system at a supernova-in-waiting.
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A planet called μ 2 Sco b (inner white dot at 4 o’clock) circles a star that will eventually flame out in an enormous explosion. Credit: V. Squicciarini et al./Astron. Astrophys. ( CC BY 4.0 )
A planet, and an object likely to be a planet, orbit a heavyweight star so massive that it will end its life in a spectacular explosion. The pair could comprise the first planetary system yet to be discovered around a star destined to form a supernova 1 .
Most of the 5,000-plus known planets beyond the Solar System circle relatively lightweight stars, no more than roughly twice the mass of the Sun. Whether planets can form and survive around stars big enough to go supernova remains relatively unexplored.
A team led by Vito Squicciarini at the University of Padua in Italy has been using the European Southern Observatory’s Very Large Telescope in Chile to search for planets around 85 young, massive stars. Around the star μ 2 Scorpii, which is about 9 times the mass of the Sun, the astronomers spotted a planet that’s roughly 14 times the mass of Jupiter.
There are also hints of a second object, roughly 18 times the mass of Jupiter and closer to the star than the first one. The presence of two planets around such a massive star suggests that large stars circled by large planets might be more common than expected.
doi: https://doi.org/10.1038/d41586-022-02166-0
References .
Squicciarini, V. et al. Astron. Astrophys. 664 , A9 (2022).
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Astronomy and astrophysics .
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