The Anglo-Australian planet search. XXII: Two new multi-planet systems

Robert A. Wittenmyer; J. Horner; Mikko Tuomi; G. S. Salter; C.G. Tinney; R. P. Butler; H.R.A. Jones; S. J. O'Toole; J. Bailey; B. D. Carter; J. S. Jenkins; Z. Zhang; S. S. Vogt; Eugenio J. Rivera

doi:10.1088/0004-637X/753/2/169

The Anglo-Australian planet search. XXII: Two new multi-planet systems

Robert A. Wittenmyer, J. Horner, Mikko Tuomi, G. S. Salter, C.G. Tinney, R. P. Butler, H.R.A. Jones, S. J. O'Toole, J. Bailey, B. D. Carter, J. S. Jenkins, Z. Zhang, S. S. Vogt, Eugenio J. Rivera

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Abstract

We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 +/- 427 days, and a minimum mass of 5.3 M-Jup. HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 +/- 0.07). The second planet in the HD 159868 system has a period of 352.3 +/- 1.3 days and m sin i = 0.73 +/- 0.05 M-Jup. In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems.

Original language	English
Article number	169
Number of pages	12
Journal	The Astrophysical Journal
Volume	753
Issue number	2
Early online date	26 Jun 2012
DOIs	https://doi.org/10.1088/0004-637X/753/2/169
Publication status	Published - 10 Jul 2012

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Wittenmyer, R. A., Horner, J., Tuomi, M., Salter, G. S., Tinney, C. G., Butler, R. P., Jones, H. R. A., O'Toole, S. J., Bailey, J., Carter, B. D., Jenkins, J. S., Zhang, Z., Vogt, S. S., & Rivera, E. J. (2012). The Anglo-Australian planet search. XXII: Two new multi-planet systems. The Astrophysical Journal, 753(2), Article 169. https://doi.org/10.1088/0004-637X/753/2/169

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title = "The Anglo-Australian planet search. XXII: Two new multi-planet systems",

abstract = "We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 +/- 427 days, and a minimum mass of 5.3 M-Jup. HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 +/- 0.07). The second planet in the HD 159868 system has a period of 352.3 +/- 1.3 days and m sin i = 0.73 +/- 0.05 M-Jup. In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems.",

author = "Wittenmyer, {Robert A.} and J. Horner and Mikko Tuomi and Salter, {G. S.} and C.G. Tinney and Butler, {R. P.} and H.R.A. Jones and O'Toole, {S. J.} and J. Bailey and Carter, {B. D.} and Jenkins, {J. S.} and Z. Zhang and Vogt, {S. S.} and Rivera, {Eugenio J.}",

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T2 - Two new multi-planet systems

AU - Wittenmyer, Robert A.

AU - Horner, J.

AU - Tuomi, Mikko

AU - Salter, G. S.

AU - Tinney, C.G.

AU - Butler, R. P.

AU - Jones, H.R.A.

AU - O'Toole, S. J.

AU - Bailey, J.

AU - Carter, B. D.

AU - Jenkins, J. S.

AU - Zhang, Z.

AU - Vogt, S. S.

AU - Rivera, Eugenio J.

N1 - Robert A. Wittenmyer, et al, 'The Anglo-Australian planet search XXII. Two new multi-planet systems', The Astrophysical ournal, Vol 753 (2) : 169, 2012. The version of record is available online at doi:10.1088/0004-637X/753/2/169. © 2012. The American Astronomical Society. All rights reserved.

PY - 2012/7/10

Y1 - 2012/7/10

N2 - We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 +/- 427 days, and a minimum mass of 5.3 M-Jup. HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 +/- 0.07). The second planet in the HD 159868 system has a period of 352.3 +/- 1.3 days and m sin i = 0.73 +/- 0.05 M-Jup. In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems.

AB - We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 +/- 427 days, and a minimum mass of 5.3 M-Jup. HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 +/- 0.07). The second planet in the HD 159868 system has a period of 352.3 +/- 1.3 days and m sin i = 0.73 +/- 0.05 M-Jup. In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems.

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DO - 10.1088/0004-637X/753/2/169

M3 - Article

SN - 0004-637X

VL - 753

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 2

M1 - 169

ER -

The Anglo-Australian planet search. XXII: Two new multi-planet systems

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