Gas giant planets with orbital periods between 10 and 200 days, known as Warm Jupiters, present a challenge for transit detection and radial velocity (RV) follow-up studies compared to their shorter-orbit counterparts, hot Jupiters.
A team of astronomers, led by Luis Thomas of the University Observatory Munich in Germany, recently conducted spectroscopic observations of 11 stars in Messier 67 (M67), also known as the King Cobra Cluster—an old and well-populated Galactic open cluster (OC).
The observational campaign utilized the Habitable Planet Finder (HPF) spectrograph mounted on the 10m Hobby-Eberle Telescope (HET) at the McDonald Observatory in Texas, as part of the “Search for Giant Planets in M67” RV survey.
“Between December 2019 and March 2022, we continued the observations of 11 stars in M67 with the Habitable Planet Finder spectrograph (HPF). We included six stars that showed potential long-term RV variations and five stars at the turn-off point of M67 which had no previously published data,” the researchers wrote in the paper.
2024-03-15 00:00:04
Source from phys.org