M2K. II. A triple-planet system orbiting HIP 57274

Debra A. Fischer; Eric Gaidos; Andrew W. Howard; Matthew J. Giguere; John A. Johnson; Geoffrey W. Marcy; Jason T. Wright; Jeff A. Valenti; Nikolai Piskunov; Kelsey I. Clubb; Howard Isaacson; Kevin Apps; Sebastien Lepine; Andrew Mann; John Moriarty; John Brewer; Julien F P Spronck; Christian Schwab; Andrew Szymkowiak

doi:10.1088/0004-637X/745/1/21

M2K. II. A triple-planet system orbiting HIP 57274

Debra A. Fischer^*, Eric Gaidos, Andrew W. Howard, Matthew J. Giguere, John A. Johnson, Geoffrey W. Marcy, Jason T. Wright, Jeff A. Valenti, Nikolai Piskunov, Kelsey I. Clubb, Howard Isaacson, Kevin Apps, Sebastien Lepine, Andrew Mann, John Moriarty, John Brewer, Julien F P Spronck, Christian Schwab, Andrew Szymkowiak

^*Corresponding author for this work

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

22 Citations (Scopus)

Abstract

Doppler observations from Keck Observatory have revealed a triple-planet system orbiting the nearby K4V star, HIP 57274. The inner planet, HIP 57274b, is a super-Earth with Msin i = 11.6 M _⊕ (0.036M _Jup), an orbital period of 8.135 0.004 days, and slightly eccentric orbit e = 0.19 0.1. We calculate a transit probability of 6.5% for the inner planet. The second planet has Msin i = 0.4M _Jup with an orbital period of 32.0 0.02 days in a nearly circular orbit (e = 0.05 0.03). The third planet has Msin i = 0.53M _Jup with an orbital period of 432 8 days (1.18 years) and an eccentricity e = 0.23 0.03. This discovery adds to the number of super-Earth mass planets with M sin i < 12 M _⊕ that have been detected with Doppler surveys. We find that 56% 18% of super-Earths are members of multi-planet systems. This is certainly a lower limit because of observational detectability limits, yet significantly higher than the fraction of Jupiter mass exoplanets, 20% 8%, that are members of Doppler-detected, multi-planet systems.

Original language	English
Article number	21
Pages (from-to)	1-8
Number of pages	8
Journal	Astrophysical Journal
Volume	745
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/745/1/21
Publication status	Published - 20 Jan 2012
Externally published	Yes

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Fischer, D. A., Gaidos, E., Howard, A. W., Giguere, M. J., Johnson, J. A., Marcy, G. W., Wright, J. T., Valenti, J. A., Piskunov, N., Clubb, K. I., Isaacson, H., Apps, K., Lepine, S., Mann, A., Moriarty, J., Brewer, J., Spronck, J. F. P., Schwab, C., & Szymkowiak, A. (2012). M2K. II. A triple-planet system orbiting HIP 57274. Astrophysical Journal, 745(1), 1-8. Article 21. https://doi.org/10.1088/0004-637X/745/1/21

@article{80f74e5f7dc54dc888c6ceff1ee94cf3,

title = "M2K. II. A triple-planet system orbiting HIP 57274",

abstract = "Doppler observations from Keck Observatory have revealed a triple-planet system orbiting the nearby K4V star, HIP 57274. The inner planet, HIP 57274b, is a super-Earth with Msin i = 11.6 M ⊕ (0.036M Jup), an orbital period of 8.135 0.004 days, and slightly eccentric orbit e = 0.19 0.1. We calculate a transit probability of 6.5% for the inner planet. The second planet has Msin i = 0.4M Jup with an orbital period of 32.0 0.02 days in a nearly circular orbit (e = 0.05 0.03). The third planet has Msin i = 0.53M Jup with an orbital period of 432 8 days (1.18 years) and an eccentricity e = 0.23 0.03. This discovery adds to the number of super-Earth mass planets with M sin i < 12 M ⊕ that have been detected with Doppler surveys. We find that 56% 18% of super-Earths are members of multi-planet systems. This is certainly a lower limit because of observational detectability limits, yet significantly higher than the fraction of Jupiter mass exoplanets, 20% 8%, that are members of Doppler-detected, multi-planet systems.",

author = "Fischer, {Debra A.} and Eric Gaidos and Howard, {Andrew W.} and Giguere, {Matthew J.} and Johnson, {John A.} and Marcy, {Geoffrey W.} and Wright, {Jason T.} and Valenti, {Jeff A.} and Nikolai Piskunov and Clubb, {Kelsey I.} and Howard Isaacson and Kevin Apps and Sebastien Lepine and Andrew Mann and John Moriarty and John Brewer and Spronck, {Julien F P} and Christian Schwab and Andrew Szymkowiak",

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doi = "10.1088/0004-637X/745/1/21",

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Fischer, DA, Gaidos, E, Howard, AW, Giguere, MJ, Johnson, JA, Marcy, GW, Wright, JT, Valenti, JA, Piskunov, N, Clubb, KI, Isaacson, H, Apps, K, Lepine, S, Mann, A, Moriarty, J, Brewer, J, Spronck, JFP, Schwab, C & Szymkowiak, A 2012, 'M2K. II. A triple-planet system orbiting HIP 57274', Astrophysical Journal, vol. 745, no. 1, 21, pp. 1-8. https://doi.org/10.1088/0004-637X/745/1/21

TY - JOUR

T1 - M2K. II. A triple-planet system orbiting HIP 57274

AU - Fischer, Debra A.

AU - Gaidos, Eric

AU - Howard, Andrew W.

AU - Giguere, Matthew J.

AU - Johnson, John A.

AU - Marcy, Geoffrey W.

AU - Wright, Jason T.

AU - Valenti, Jeff A.

AU - Piskunov, Nikolai

AU - Clubb, Kelsey I.

AU - Isaacson, Howard

AU - Apps, Kevin

AU - Lepine, Sebastien

AU - Mann, Andrew

AU - Moriarty, John

AU - Brewer, John

AU - Spronck, Julien F P

AU - Schwab, Christian

AU - Szymkowiak, Andrew

PY - 2012/1/20

Y1 - 2012/1/20

N2 - Doppler observations from Keck Observatory have revealed a triple-planet system orbiting the nearby K4V star, HIP 57274. The inner planet, HIP 57274b, is a super-Earth with Msin i = 11.6 M ⊕ (0.036M Jup), an orbital period of 8.135 0.004 days, and slightly eccentric orbit e = 0.19 0.1. We calculate a transit probability of 6.5% for the inner planet. The second planet has Msin i = 0.4M Jup with an orbital period of 32.0 0.02 days in a nearly circular orbit (e = 0.05 0.03). The third planet has Msin i = 0.53M Jup with an orbital period of 432 8 days (1.18 years) and an eccentricity e = 0.23 0.03. This discovery adds to the number of super-Earth mass planets with M sin i < 12 M ⊕ that have been detected with Doppler surveys. We find that 56% 18% of super-Earths are members of multi-planet systems. This is certainly a lower limit because of observational detectability limits, yet significantly higher than the fraction of Jupiter mass exoplanets, 20% 8%, that are members of Doppler-detected, multi-planet systems.

AB - Doppler observations from Keck Observatory have revealed a triple-planet system orbiting the nearby K4V star, HIP 57274. The inner planet, HIP 57274b, is a super-Earth with Msin i = 11.6 M ⊕ (0.036M Jup), an orbital period of 8.135 0.004 days, and slightly eccentric orbit e = 0.19 0.1. We calculate a transit probability of 6.5% for the inner planet. The second planet has Msin i = 0.4M Jup with an orbital period of 32.0 0.02 days in a nearly circular orbit (e = 0.05 0.03). The third planet has Msin i = 0.53M Jup with an orbital period of 432 8 days (1.18 years) and an eccentricity e = 0.23 0.03. This discovery adds to the number of super-Earth mass planets with M sin i < 12 M ⊕ that have been detected with Doppler surveys. We find that 56% 18% of super-Earths are members of multi-planet systems. This is certainly a lower limit because of observational detectability limits, yet significantly higher than the fraction of Jupiter mass exoplanets, 20% 8%, that are members of Doppler-detected, multi-planet systems.

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U2 - 10.1088/0004-637X/745/1/21

DO - 10.1088/0004-637X/745/1/21

M3 - Article

AN - SCOPUS:84862908185

SN - 0004-637X

VL - 745

SP - 1

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JO - Astrophysical Journal

JF - Astrophysical Journal

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ER -

M2K. II. A triple-planet system orbiting HIP 57274

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