Another shipment of six short-period giant planets from TESS

We present the discovery and characterization of six short-period, transiting giant planets from NASA's Transiting Exoplanet Survey Satellite (TESS) -- TOI-1811 (TIC 376524552), TOI-2025 (TIC 394050135), TOI-2145 (TIC 88992642), TOI-2152 (TIC 395393265), TOI-2154 (TIC 428787891), and TOI-2497 (TIC 97568467). All six planets orbit bright host stars (8.9 < 11.8, 7.7 < 10.1). Using a combination of time-series photometric and spectroscopic follow-up observations from the TESS Follow-up Observing Program Working Group, we have determined that the planets are Jovian-sized (R-P = 0.99-1.45 R-J), have masses ranging from 0.92 to 5.26 M-J, and orbit F, G, and K stars (4766 <= T-eff <= 7360 K). We detect a significant orbital eccentricity for the three longest-period systems in our sample: TOI-2025 b (P = 8.872 d, 0.394(-0.038+0.035)), TOI-2145 b (P = 10.261 d, e = 0.208(-0.047)(+0.034)), and TOI-2497 b (P = 10.656 d, e = 0.195(-0.040)(+0.043)). TOI-2145 b and TOI-2497 b both orbit subgiant host stars (3.8 < log g <4.0), but these planets show no sign of inflation despite very high levels of irradiation. The lack of inflation may be explained by the high mass of the planets; 5.26(-0.37)(+0.38) M-J (TOI-2145 b) and 4.82 +/- 0.41 M-J (TOI-2497 b). These six new discoveries contribute to the larger community effort to use TESS to create a magnitude-complete, self-consistent sample of giant planets with well-determined parameters for future detailed studies.

Automated summary

We have discovered and characterized six short-period, transiting giant planets from NASA's TESS. These planets orbit bright host stars, are Jovian-sized, have masses ranging from 0.92 to 5.26 M-J, and orbit F, G, and K stars. The three longest-period systems in our sample show significant orbital eccentricity. Despite orbiting subgiant host stars, two of these planets show no sign of inflation, which may be explained by their high masses.