An exoplanet with an unusually fast orbit of just 3.2 days has been discovered around an aging star 725 light-years from Earth.
The team from the Indian Physical Research Laboratory (PRL) in Ahmedabad, India, spent three months measuring the orbit of the gas giant planet “Hot Jupiter”.
Professor Abhijit Chakraborty, who led the project, said the new exoplanet, TOI-1789b, was “orbiting too close to an evolved or aging star”.
The team discovered the planet 1.4 times larger than Jupiter but only 70% of Jupiter’s mass through the PARAS instrument on the telescope at the Mt Abu Observatory.
Astronomers explain that the planet’s “bulging” property comes from having a temperature of 1,726 degrees Celsius and the planet’s orbit around its near-life-spanning star making the discovery an important study. important.
The team spent 3 months studying this newly discovered extrasolar planet, from December 2020 to March 2021, to understand the size and orbit of the planet.
In addition to detecting the mass of the planet is smaller than Jupiter, although larger in size, the team also found the planet to be exceptionally hot. This is because the newly discovered exoplanet orbits very close to its host star. This star is 1.5 times more massive than the Sun.
TOI-1789b completes its orbit around the star TOI-1789 in 3.2 days, significantly less than the 88-day orbit that Mercury orbits the Sun.
The planet is 0.05 AU (astronomical unit) from the star, where 1 AU is the distance between the Sun and Earth. At 0.05 AU, the distance between TOI-1789b and the host star is roughly 1/10 the distance between the Sun and Mercury.
Jupiter-like planets have been discovered before, but are rare because these gas giants are often found in the outer regions of star systems.
The discovery of the new planet 725 light-years from Earth was published in the Monthly Notices journal of the Royal Astronomical Society.