Bengaluru: Search group and exoplanet studies in the Ahmedabad-based physical research laboratory (PRL), have found new exoplanets orbiting too close to evolving stars or ages with a mass of 1.5 times the sunset and located 725 years, according to space research organizations India.
The present invention was made using advanced radial-velocity fiber spectrograph (paras), the first of its kind in India, on a 1.2 meter PLL telescope at Mt.
Abu Observatory, a room headquartered between the Bengaluru word agency in a statement.
Using the Paras, which has the ability to measure the mass of exoplanet, the exoplanet mass was found 70 percent and a size of about 1.4 times the Jupiter, he said.
This measurement was conducted between December 2020 and March 2021.
The further follow-up measurement was also obtained from the TCES spectograph from Germany in April 2021, as well as an independent photometric observation of the 43-CM PRL telescope in Mt.
Ash.
This star is known as HD 82139 according to the Catalog of Henry Draper and TOI 1789 according to the TESS catalog.
Therefore, the planet is known as 1789B Toi or HD 82139B according to IAU nomenclature.
Discovery team led by Prof.
Abhijit Chakraborty, including students and team members, and international collaborators from Europe and the US.
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 such close-in systems known among exoplanet zoos known so far.
Because it is close to the planet to the host star, it is heated with surface temperatures reaching up to 2000 K, and therefore the radius is increasing, making it one of the lowest known planets known (density of 0.31 grams per cc), recorded.
Close to the exoplanet around the star (with a distance of less than 0.1 au) with a mass between 0.25 to several Jupiter masses called “hot-jupiters”.
“The system detection increases our understanding of the various mechanisms responsible for inflation in hot-jupiters and the formation and evolution of the planetary system around developing stars and parents,” ISRO said.
This is the second exoplanet found by the PRL (autonomous unit from the Department of Space) scientists who use the paras at 1.2 M Mt.
Ash telescope; The first exoplanet K2-236B, sub-saturn size at 600 light years, was found in 2018.