The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

Robert A. Wittenmyer; Liang Wang; Fan Liu; Jonathan Horner; Michael Endl; John Asher Johnson; C. G. Tinney; B. D. Carter

doi:10.1088/0004-637X/800/1/74

The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

Robert A. Wittenmyer, Liang Wang, Fan Liu, Jonathan Horner, Michael Endl, John Asher Johnson, C. G. Tinney, B. D. Carter

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

16 Citations (Scopus)

Abstract

Precise radial velocities from the Anglo-Australian Telescope (AAT) confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution using the AAT data shows that the inner planet has P = 89.1 ± 0.1 days, and m sin i = 1.35 ± 0.17 M_Jup. These data also confirm the planetary nature of the outer companion, with m sin i = 3.9 ± 0.6 M_Jup and a = 2.96 ± 0.16 AU. HD 121056 is the most-evolved star to host a confirmed multiple-planet system, and is a valuable example of a giant star hosting both a short-period and a long-period planet.

Original language	English
Article number	74
Journal	Astrophysical Journal
Volume	800
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/800/1/74
Publication status	Published - 10 Feb 2015

Access to Document

10.1088/0004-637X/800/1/74

Cite this

@article{e852d28b5e4f41e38a3922457fa0b507,

title = "The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056",

abstract = "Precise radial velocities from the Anglo-Australian Telescope (AAT) confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution using the AAT data shows that the inner planet has P = 89.1 ± 0.1 days, and m sin i = 1.35 ± 0.17 MJup. These data also confirm the planetary nature of the outer companion, with m sin i = 3.9 ± 0.6 MJup and a = 2.96 ± 0.16 AU. HD 121056 is the most-evolved star to host a confirmed multiple-planet system, and is a valuable example of a giant star hosting both a short-period and a long-period planet.",

keywords = "Planetary systems, Stars: individual (HD 121056), Techniques: radial velocities",

author = "Wittenmyer, {Robert A.} and Liang Wang and Fan Liu and Jonathan Horner and Michael Endl and Johnson, {John Asher} and Tinney, {C. G.} and Carter, {B. D.}",

year = "2015",

month = feb,

day = "10",

doi = "10.1088/0004-637X/800/1/74",

language = "English",

volume = "800",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

TY - JOUR

T1 - The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

AU - Wittenmyer, Robert A.

AU - Wang, Liang

AU - Liu, Fan

AU - Horner, Jonathan

AU - Endl, Michael

AU - Johnson, John Asher

AU - Tinney, C. G.

AU - Carter, B. D.

PY - 2015/2/10

Y1 - 2015/2/10

N2 - Precise radial velocities from the Anglo-Australian Telescope (AAT) confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution using the AAT data shows that the inner planet has P = 89.1 ± 0.1 days, and m sin i = 1.35 ± 0.17 MJup. These data also confirm the planetary nature of the outer companion, with m sin i = 3.9 ± 0.6 MJup and a = 2.96 ± 0.16 AU. HD 121056 is the most-evolved star to host a confirmed multiple-planet system, and is a valuable example of a giant star hosting both a short-period and a long-period planet.

AB - Precise radial velocities from the Anglo-Australian Telescope (AAT) confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution using the AAT data shows that the inner planet has P = 89.1 ± 0.1 days, and m sin i = 1.35 ± 0.17 MJup. These data also confirm the planetary nature of the outer companion, with m sin i = 3.9 ± 0.6 MJup and a = 2.96 ± 0.16 AU. HD 121056 is the most-evolved star to host a confirmed multiple-planet system, and is a valuable example of a giant star hosting both a short-period and a long-period planet.

KW - Planetary systems

KW - Stars: individual (HD 121056)

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=84922693037&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/800/1/74

DO - 10.1088/0004-637X/800/1/74

M3 - Article

SN - 0004-637X

VL - 800

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 74

ER -

The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

Abstract

Access to Document

Other files and links

Fingerprint

Cite this