Two Planets Straddling the Habitable Zone of The Nearby K Dwarf Gl 414A

Abstract

We present the discovery of two planets orbiting the nearby (D=11.9 pc) K7 dwarf Gl 414A. Gl 414A b is a sub-Neptune mass planet with M${}_b\sin i_b=9.28_{-2.54}^{+3.19}$ M${}_{\oplus }$ and a semi-major axis of 0.24 $\pm$ 0.01 au. Gl 414A c is a sub-Saturn mass planet with $M_c\sin i_c=59.48_{-9.69}^{+9.98}$ M${}_{\oplus }$ and a semi-major axis of 1.43 $\pm$ 0.06 au. We jointly analyzed radial velocity data from Keck/HIRES and the Automated Planet Finder at Lick Observatory, as well as photometric data from KELT, to detect the two planets as well as two additional signals related to the rotationally-modulated activity and the long term magnetic activity cycle of the star. The outer planet in this system may be a potential candidate for future direct imaging missions.

14 pages, 9 figures, Submitted to AJ; fixed typos and updated section 6.3

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