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

doi:10.3847/1538-3881/abd0ef

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

Steward Observatory

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

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 language	English (US)
Article number	abd0ef
Journal	Astronomical Journal
Volume	161
Issue number	2
DOIs	https://doi.org/10.3847/1538-3881/abd0ef
State	Published - Feb 1 2021

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/abd0ef

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Dedrick, C. M., Fulton, B. J., Knutson, H. A., Howard, A. W., Beatty, T. G., Cargile, P. A., Gaudi, B. S., Hirsch, L. A., Kuhn, R. B., Lund, M. B., James, D. J., Kosiarek, M. R., Pepper, J., Petigura, E. A., Rodriguez, J. E., Stassun, K. G., & Stevens, D. J. (2021). Two planets straddling the habitable zone of the nearby K dwarf Gl 414A. Astronomical Journal, 161(2), Article abd0ef. https://doi.org/10.3847/1538-3881/abd0ef

Dedrick, CM, Fulton, BJ, Knutson, HA, Howard, AW, Beatty, TG, Cargile, PA, Gaudi, BS, Hirsch, LA, Kuhn, RB, Lund, MB, James, DJ, Kosiarek, MR, Pepper, J, Petigura, EA, Rodriguez, JE, Stassun, KG & Stevens, DJ 2021, 'Two planets straddling the habitable zone of the nearby K dwarf Gl 414A', Astronomical Journal, vol. 161, no. 2, abd0ef. https://doi.org/10.3847/1538-3881/abd0ef

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title = "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 = 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.",

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

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doi = "10.3847/1538-3881/abd0ef",

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AU - Dedrick, Cayla M.

AU - Fulton, Benjamin J.

AU - Knutson, Heather A.

AU - Howard, Andrew W.

AU - Beatty, Thomas G.

AU - Cargile, Phillip A.

AU - Gaudi, B. Scott

AU - Hirsch, Lea A.

AU - Kuhn, Rudolf B.

AU - Lund, Michael B.

AU - James, David J.

AU - Kosiarek, Molly R.

AU - Pepper, Joshua

AU - Petigura, Erik A.

AU - Rodriguez, Joseph E.

AU - Stassun, Keivan G.

AU - Stevens, Daniel J.

PY - 2021/2/1

Y1 - 2021/2/1

N2 - 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.

AB - 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.

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

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Radial velocities of Gl 414A with Keck I and APF

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

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Radial velocities of Gl 414A with Keck I and APF

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