A planetary-mass companion to the K0 giant HD 17092

A. Niedzielski, M. Konacki, A. Wolszczan, G. Nowak, G. Maciejewski, C. R. Gelino, M. Shao, M. Shetrone, L. W. Ramsey

Research output: Contribution to journalArticle

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Abstract

We report the discovery of a substellar-mass companion to the K0 giant HD 17092 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed 360 day periodicity with the standard indicators of stellar activity, the observed radial velocity variations are most plausibly explained in terms of a Keplerian motion of a planetary-mass body around the star. As the estimated stellar mass is 2.3 M, the minimum mass of the planet is 4.6 MJ. The planet's orbit is characterized by a mild eccentricity of e = 0.17 and a semimajor axis of 1.3 AU. This is the tenth published detection of a planetary companion around a red giant star. Such discoveries add to our understanding of planet formation around intermediate-mass stars, and they provide dynamical information on the evolution of planetary systems around post-main-sequence stars.

Original languageEnglish (US)
Pages (from-to)1354-1358
Number of pages5
JournalAstrophysical Journal
Volume669
Issue number2
DOIs
StatePublished - Nov 10 2007

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planetary mass
planets
planet
stellar activity
red giant stars
stars
planetary systems
main sequence stars
stellar mass
eccentricity
radial velocity
periodic variations
telescopes
body mass
periodicity
orbits

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Niedzielski, A., Konacki, M., Wolszczan, A., Nowak, G., Maciejewski, G., Gelino, C. R., ... Ramsey, L. W. (2007). A planetary-mass companion to the K0 giant HD 17092. Astrophysical Journal, 669(2), 1354-1358. https://doi.org/10.1086/521784
Niedzielski, A. ; Konacki, M. ; Wolszczan, A. ; Nowak, G. ; Maciejewski, G. ; Gelino, C. R. ; Shao, M. ; Shetrone, M. ; Ramsey, L. W. / A planetary-mass companion to the K0 giant HD 17092. In: Astrophysical Journal. 2007 ; Vol. 669, No. 2. pp. 1354-1358.
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Niedzielski, A, Konacki, M, Wolszczan, A, Nowak, G, Maciejewski, G, Gelino, CR, Shao, M, Shetrone, M & Ramsey, LW 2007, 'A planetary-mass companion to the K0 giant HD 17092', Astrophysical Journal, vol. 669, no. 2, pp. 1354-1358. https://doi.org/10.1086/521784

A planetary-mass companion to the K0 giant HD 17092. / Niedzielski, A.; Konacki, M.; Wolszczan, A.; Nowak, G.; Maciejewski, G.; Gelino, C. R.; Shao, M.; Shetrone, M.; Ramsey, L. W.

In: Astrophysical Journal, Vol. 669, No. 2, 10.11.2007, p. 1354-1358.

Research output: Contribution to journalArticle

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Niedzielski A, Konacki M, Wolszczan A, Nowak G, Maciejewski G, Gelino CR et al. A planetary-mass companion to the K0 giant HD 17092. Astrophysical Journal. 2007 Nov 10;669(2):1354-1358. https://doi.org/10.1086/521784