Using NASA’s Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered nine new “hot Jupiter” exoplanets. One of the newly detected alien worlds is almost four times more massive than Jupiter. The finding was presented in a paper published January 11 on the pre-print server arXiv.
Now, a group of astronomers led by Jack Schulte of the Michigan State University confirmed another nine planets monitored by TESS. They report that transit signals have been detected in the light curves of nine distant stars. The planetary nature of these signals was confirmed later by ground-based imaging and spectroscopic observations.
“In this article, we present nine new hot Jupiters discovered by NASA’s TESS mission as part of an ongoing effort to discover and characterize all HJs [hot Jupiters] orbiting FGK stars brighter than G = 12.5 mag,” the researchers wrote.
The newfound exoplanets, designated TOI-1855 b, TOI-2107 b, TOI-2368 b, TOI-3321 b, TOI-3894 b, TOI-3919 b, TOI-4153 b, TOI-5232 b, and TOI-5301 b, are mostly similar in size to Jupiter, but their masses range from 0.55 to 3.88 Jupiter masses. TOI-3919 b is the most massive one, while the largest one is TOI-1855 b—with a radius of approximately 1.65 Jupiter radii.
All the newly discovered planets have orbital periods shorter than eight days, and their equilibrium temperatures were estimated to be between 1,000 and 1,772 K. The hottest exoplanet out of the nine turned out to be TOI-5232 K.
2024-01-18 05:00:04
Post from phys.org
