1. A Warm Jupiter-sized Planet Transiting the Pre-main-sequence Star V1298 Tau
- Author
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David, TJ, David, TJ, Cody, AM, Hedges, CL, Mamajek, EE, Hillenbrand, LA, Ciardi, DR, Beichman, CA, Petigura, EA, Fulton, BJ, Isaacson, HT, Howard, AW, Gagné, J, Saunders, NK, Rebull, LM, Stauffer, JR, Vasisht, G, Hinkley, S, David, TJ, David, TJ, Cody, AM, Hedges, CL, Mamajek, EE, Hillenbrand, LA, Ciardi, DR, Beichman, CA, Petigura, EA, Fulton, BJ, Isaacson, HT, Howard, AW, Gagné, J, Saunders, NK, Rebull, LM, Stauffer, JR, Vasisht, G, and Hinkley, S
- Abstract
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 = 8.1 mag), and rapid stellar rotation (= 23 km s-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.
- Published
- 2019