Jupiter-mass exoplanet discovered in near-Earth star

Jupiter-mass exoplanet discovered in near-Earth star

Astronomers from the University of Southern Queensland in Australia have detected the presence of another exoplanet orbiting the star HD 83443. According to the study generated from the collected data, the mass of this planet outside our system is slightly more than that. of Jupiter, and it takes about 22 Earth years for one complete revolution in its orbit.

The star HD 83443 was already known to us because of another exoplanet it hosted: located at a distance of 164 light-years from Earth, it also serves for HD 83443 b, a planet containing half the size of Jupiter. are ratio and whose year is only three days.

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The graph shows observational data that led to the discovery of a new Jupiter-like exoplanet: each colored line represents a different instrument from the same observation (Image: Errico et al. 2022 / reproduction)

The new planet, on the other hand, received the designation “HD 83443 c” and, according to the paper, has a mass 1.5 times that of our gas giant, and maintains a distance of about eight astronomical units (AU) from itself. Host star.. For reference purposes, an AU is equal to plus or minus 150 million kilometers (km) and is the unit of measurement used to determine the average distance between Earth and the Sun.

What’s interesting about this discovery is that, because of its extremely eccentric orbit, scientists speculate that HD 83443 c is part of the star system’s core structure. In practice, they believe the “push” occurred as a result of some ancient event that moved the smaller HD 83443 ba into orbit closer to its star – an orange dwarf – while HD 83443 c remained in an earlier configuration. .

They also suspect that a third exoplanet may have been involved in the event and ejected – potentially becoming a rogue planet, i.e. not associated with any stars.

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Australian experts are not yet aware of the chemical composition of the discovered exoplanet, but they note that studies should continue. For now, the content of their search Available for consultation on arXiv,

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About the author: Cory Weinberg

"Student. Subtly charming organizer. Certified music advocate. Writer. Lifelong troublemaker. Twitter lover."

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