According to Mehr news agency, citing Fiz, the TESS satellite is investigating 200,000 bright stars near the Sun with the aim of searching for planets outside the solar system that pass in front of the stars. This instrument has so far observed more than 7,200 possible extrasolar planets, of which 545 have been confirmed so far.
Now a team of researchers led by Sanjay Baliwal of PRL has confirmed the existence of another extrasolar planet with the help of TESS. They observed a transiting signal in the light curve of the star TOI 6651. This celestial object is a G-type star at a distance of about 690 light-years from Earth and is estimated to be 3.7 billion years old. Subsequent observations confirmed the planetary nature of these signals.
“We present a new discovery with the characteristics of a dense Saturn-like exoplanet, TOI6651b, passing in front of a metal-rich G-type star,” the researchers wrote in their paper.
According to existing research, the radius of this planet is about 5.09 times and its volume is 61 times more than Earth. This profile indicates a density of 2.52 g/cm3, indicating the existence of the densest Saturn-like planet observed by TESS.
The orbit of TOI6651b around its host star takes 5.05 days and the equilibrium temperature of this planet is estimated to be 1493 K. The authors of the research estimate that the nuclear mass of this planet is 53 times that of Earth. They believe that this planet is primarily composed of dense materials such as rock and iron, which make up 87% of its total mass. The remainder of the planet’s mass is likely composed of a low-density hydrogen/helium envelope.
The summary of the research results shows that the unusual features of TOI6651b challenge the existing assumptions about the formation of planets.
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