PLATOSpec first results: Three new transiting warm Jupiters from the WINE survey, TIC 147027702, TIC 245076932, and TIC 87422071

We report the discovery and characterisation of three transiting warm Jupiters: TIC, 147027702b, TIC, 245076932b, and TIC, 87422071b. These systems were initially identified as transiting candidates using light curves generated from the full-frame images of the TESS mission. We confirmed the planetary nature of these objects with ground-based spectroscopic follow-up observations using FEROS and the new PLATOSpec spectrograph attached to the ESO 1. 52 m telescope at the La Silla Observatory, and with ground-based photometric observations of the Observatoire Moana, Las Cumbres Observatory Global Telescope and ASTEP. From a global fit to the photometry and radial velocities, we determine that the planet TIC, 147027702b has a low-eccentricity orbit (e = 0. 13 ± 0. 05) with a period of 44. 4 days, a mass of +0. 07 _ -0. 13 MJ, and a radius of 0. 98 ± 0. 06 RJ. TIC, 245076932b has a moderately low mass of 0. 51 ± 0. 05 MJ, a radius of 0. 97 ± 0. 05 RJ, and an eccentric orbit (e = 0. 43 ± 0. 02) with a period of 21. 6 days. TIC, 87422071b has a mass of 1. 29 ± 0. 10 MJ, a radius of 0. 97 ± 0. 08 RJ, and a slightly eccentric orbit (e = 0. 12 ± 0. 07) with a period of 11. 3 days. These well-characterised warm Jupiters expand the currently limited sample of similar gas giants and provide valuable benchmarks for testing models of giant-planet formation, migration, and tidal evolution.