摘要：We report the detection of V1298 Tau b, a warm Jupiter-sized planet (R P =0.91± 0.05 R Jup , P=24.1 days) transiting a young solar analog with an estimated age of 23 Myr. The star and its planet belong to Group 29, a young association in the foreground of the Taurus–Auriga star-forming region. While hot Jupiters have been previously reported around young stars, those planets are non-transiting and near-term atmospheric characterization is not feasible. The V1298 Tau system is a compelling target for follow-up study through transmission spectroscopy and Doppler tomography owing to the transit depth (0.5%), host star brightness (K s =8.1mag), and rapid stellar rotation ( v i sin =23 kms −1 ). Although the planet is Jupiter-sized, its mass is currently unknown due to high-amplitude radial velocity jitter. Nevertheless, V1298 Tau b may help constrain formation scenarios for at least one class of close-in exoplanets, providing a window into the nascent evolution of planetary interiors and atmospheres.
关键词：open clusters and associations: individual (Group 29, Taurus–Auriga);planets and satellites: gaseous planets;planets and satellites: physical evolution;stars: individual (V1298 Tau);stars: pre-main sequence
