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Astronomers find the third planet obituary a giant star HD 33142


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Artist impressions of the planetary system HD 33142, located 397 light-years away in the constellation Lepus. Giant star HD 33142, an early K giant star located 397 light-years away in the constellation Lepus.

Nationalgeographic.co.id—An international team of astronomers announced the discovery of a third planet in the planetary system HD 33142. The findings were based on observations using the radial velocity (RV) method.

A full description of the results has been published in Journal of Astronomy by title “A new third planet with the dynamic architecture of the HD33142 planetary system“recently.

Trifon Trifonov, astronomer at Max-Planck-Institut Four Astronomy and Sofia University ‘St. Kliment Ohridski said: “Since the first detection of exoplanets around star-type suns in 1995, the number of confirmed exoplanets has increased rapidly to more than 5,000.,’ and colleagues, reported by Sci-News.

Trifonov said most were found using the transportation method, followed by the RV method. “The RV technique is the best way to determine the orbital architecture of multi-planet systems, which is important for improving our understanding of planet formation and orbit evolution,” he explained.

Of note, the planet recently discovered the orbit of giant star HD 33142, an early K giant star located 397 light-years away in the constellation Lepus. This star is also known as HIP 23844 and BD-14 1051.

This star is at least 2.7 billion years old, about 4 times as massive and 1.5 times as massive as the Sun. “The HD 33142 star is most likely a giant star early in the red giant phase, but it could also be at the end of a subgiant branch,” astronomers said.

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The star is already known for organizing two planets in the Jovian mass, which is a unit of mass equal to the mass of the planet Jupiter. The two planets are HD 33142b with an orbital period of 330 days and HD 33142c with an orbital period of 830 days.

Keck's telescope on Mauna Kea.

Wikimedia Commons

Keck’s telescope on Mauna Kea.

Trifonov and his co-authors found solid evidence for the existence of a Saturnian mass, a short-period companion. “Our periodogram analysis of the exact RV shows solid evidence for a short-period Doppler signal in the remaining congruence of the Kepler planets, which we interpret as a third Saturnian-mass planet,” he explained.

“We studied the dynamic behavior of the three-planet system configuration and the N-body integration scheme, we found it stable over the long term and the rest of the planets between low and moderate eccentricity episodes.”



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