An international group of astronomers has reported the discovery of a new super-Jupiter exoplanet as part of the Next Generation Transit Survey (NGTS). Located approximately 1,430 light-years away, the newly discovered alien world is almost four times larger than Jupiter and is estimated to be only millions of years old. The discovery was detailed in an article published on the preprocessing server on November 13. arXiv.

NGTS is a wide-field photometric survey focused primarily on the search for Neptune-sized exoplanets and smaller exoplanets orbiting bright stars. The project uses a series of small, fully robotic telescopes operating at red optical wavelengths at the Paranal Observatory in Chile. It uses transit photometry to search for new external worlds; This method precisely measures the dimming of a star to detect the presence of a planet passing in front of it.

Now Douglas R. Alvesa has found another extrasolar world with NGTS photometry. A new planet has been detected around NGTS-33, a rapidly rotating massive hot star.

“Here we report the discovery of NGTS-33b, the first NGTS discovery of a super-Jupiter hosted on a massive star,” the researchers wrote in the paper.

Observations have shown that NGTS-33b has a radius of about 1.64 Jupiter radii and a mass of about 3.63 Jupiter masses, giving it a density of 0.19 g/cm.³. The planet orbits its hosts at a distance of 0.048 AU every 2.82 days, and its equilibrium temperature is estimated to be 1991 K.

Astronomers noted that NGTS-33b’s low density is 13% less than expected compared to transiting hot Jupiters of similar mass. Additionally, planetary structure models indicate that the radius of this planet has increased, possibly by 15%.

As for the parent star NGTS-33, this star has the spectral type of A9V, its radius is about 1.47 solar radii, and it is about 60% larger than the Sun. The star’s rotation period is 0.66 days and its effective temperature is 7437 K. The age of NGTS-33 is estimated to be between 10 and 50 million years old.

The researchers noted how unique the discovery of a planet like NGTS-33 is, as only 11 massive super-Jupiter exoplanets have been discovered so far orbiting hot stars.

“The discovery of NGTS-33b will significantly increase the small but growing population of giant THJs.” [транзитних гарячих Юпітерів]”This will help place additional constraints on existing models of the formation and evolution of such planetary systems,” the paper’s authors concluded.