Kavli Affiliate: Andrew Vanderburg
| First 5 Authors: Joseph E. Rodriguez, Samuel N. Quinn, Andrew Vanderburg, George Zhou, Jason D. Eastman
| Summary:
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), & TOI-2497 (TIC 97568467).
All six planets orbit bright host stars (8.9 <G< 11.8, 7.7 <K< 10.1). Using a
combination of time-series photometric and spectroscopic follow-up observations
from the TESS Follow-up Observing Program (TFOP) Working Group, we have
determined that the planets are Jovian-sized (R$_{P}$ = 1.00-1.45 R$_{J}$),
have masses ranging from 0.92 to 5.35 M$_{J}$, and orbit F, G, and K stars
(4753 $<$ 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 days,
$e$ = $0.220pm0.053$), TOI-2145 b (P = 10.261 days, $e$ =
$0.182^{+0.039}_{-0.049}$), and TOI-2497 b (P = 10.656 days, $e$ =
$0.196^{+0.059}_{-0.053}$). 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; $5.35^{+0.32}_{-0.35}$ M$_{rm J}$ (TOI-2145
b) and $5.21pm0.52$ M$_{rm J}$ (TOI-2497 b). These six new discoveries
contribute to the larger community effort to use {it TESS} to create a
magnitude-complete, self-consistent sample of giant planets with
well-determined parameters for future detailed studies.
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