Bengaluru: The Indian Space Research Organization (ISRO) said that the Exoplanet Search and Study Group at the Physical Research Laboratory (PRL), Ahmedabad, had found a new exoplanet orbiting too close to a evolving star or aging with a mass of 1.5 times.
The sun and located 725 light years.
The discovery was led by Prof.
Abhijit Chakraborty and included his students, team members, and international collaborators from Europe and the US.
The job of this discovery was published in the monthly notification of the reference journal about the Royal Astronomical Society, titled “Jupiter’s Hot Discovery which increased around a slightly developed star toi-1789”.
“This discovery was created using the Advanced Radial-Velocity ABA-SKY Prl Search (Paras) Fiber-Fed optical spectrograph, the first of its kind in India, on a 1.2 meter PLL telescope on Mt.
Abu Observatory.
Use the paras, which has the ability to Measuring the mass of exoplanet, the mass exoplanet was found 70% and a size of about 1.4 times the Jupiter, “Isro said.
While these measurements were carried out between December 2020 and March 2021, the measurement of follow-up was further obtained from the TCES spectograph from Germany in April 2021, and also an independent photometric observation of the 43-cm tel location in Mt.
Ash.
“This star is known as HD 82139 in accordance with the Henry Draper and TOI 1789 catalog in accordance with the Tess catalog.
Therefore, the planet is known as TOI 1789B or HD.
82139.
b according to the nomencies of IAU (International Astronomical Union),” the researchers said.
The newly discovered planetary star system is very unique – the planet orbits the host star in just 3.2 days, so it places it very close to the star at a distance of 0.05 au (about a tenth of the distance between the sun and mercury).
“There are less than 10 close-in systems that are known among the exoplanet zoos known so far One of the lowest known planets known (density of 0.31 grams per cc), “an ISRO statement reading.
Close to exoplanets around the star (with a distance of less than 0.1 au) with a mass between 0.25 to several Jupiter masses called “hot-jupiter”, the researchers said.
“Such system detection increases our understanding of various mechanisms responsible for inflation in Jupiter’s heat and the formation and evolution of the planetary system around a growing and aging star,” he added.
The research findings have been written by the Khandelwal, Abhijit Chakraborty, Rishikesh Sharma, Ashirbad Nayak, Dishendra and Neelam JSSV Prasad from the PRL; Priyanka Chaturvedi, Eike W Guenther, Artie P Hatzes, Massimiliano Esposito and Sireesha Chamarthi, from TLS Tautenburg, Germany; Carina M Person and Malcolm Fridlund from the Department of Space, Bumi and the Environment, Chalmers University of Technology, Sweden and Steve B Howell from NASA Ames Research Center.
This is the second exoplanet found by PRL scientists using the paras at 1.2 M Mt.
Telescope ash; The first exoplanet K2-236B, sub-saturn size at 600 light years, was found in 2018.