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Jordán, A.; Bakos, G. Á.; Bayliss, D.; Bento, J.; Bhatti, W.; Brahm, R.; Csubry, Z.; Espinoza, N.; Hartman, J. D.; Henning, Th; Mancini, L.; Penev, K.; Rabus, M.; Sarkis, P.; Suc, V.; de Val-Borro, M.; Zhou, G.; Butler, R. P.; Teske, J.; Crane, J.; Shectman, S.; Tan, T. G.; Thompson, I.; Wallace, J. J.; Lázár, J.; Papp, I.; Sári, P.
The Astronomical journal, 11/2020, Letnik: 160, Številka: 5Journal Article
Abstract We report the discovery of two transiting Neptunes by the HATSouth survey. The planet HATS-37Ab has a mass of (31.5 ± 13.4 M ⊕ ) and a radius of , and is on a day orbit around a mag, star with a radius of . We also present evidence that the star HATS-37A has an unresolved stellar companion HATS-37B, with a photometrically estimated mass of . The planet HATS-38b has a mass of (23.5 ± 3.5 M ⊕ ) and a radius of , and is on a day orbit around a mag, star with a radius of . Both systems appear to be old, with isochrone-based ages of Gyr, and Gyr, respectively. Both HATS-37Ab and HATS-38b lie in the Neptune desert and are thus examples of a population with a low occurrence rate. They are also among the lowest-mass planets found from ground-based wide-field surveys to date.
