Two planets straddling the habitable zone of the nearby K dwarf Gl 414A

Cayla M. Dedrick, Benjamin J. Fulton, Heather A. Knutson, Andrew W. Howard, Thomas G. Beatty, Phillip A. Cargile, B. Scott Gaudi, Lea A. Hirsch, Rudolf B. Kuhn, Michael B. Lund, David J. James, Molly R. Kosiarek, Joshua Pepper, Erik A. Petigura, Joseph E. Rodriguez, Keivan G. Stassun, Daniel J. Stevens

Research output: Contribution to journalArticlepeer-review

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 = Mb sin ib 7.60+2.44-2.19 M⊗ and a semimajor axis of 0.23 ± 0.01 au. Gl 414A c is a sub-Saturn mass planet with = Mc sin ic 53.83+9.18-8.58M⊗ and a semimajor axis of 1.43 ± 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 and 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.

Original languageEnglish (US)
Article numberabd0ef
JournalAstronomical Journal
Volume161
Issue number2
DOIs
StatePublished - Feb 1 2021

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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