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The discovery of a ...
The discovery of a planetary candidate around the evolved low-mass Kepler giant star HD 175370
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- Hrudkova, M. (author)
- Isaac Newton Group
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- Hatzes, A. (author)
- Thüringer Landessternwarte Tautenburg
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- Karjalainen, R. (author)
- Isaac Newton Group
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- Lehmann, H. (author)
- Thüringer Landessternwarte Tautenburg
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- Hekker, S. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Århus Universitet,Aarhus University
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- Hartmann, M. (author)
- Thüringer Landessternwarte Tautenburg
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- Tkachenko, A. (author)
- Katholieke Universiteit Leuven
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- Prins, S. (author)
- Katholieke Universiteit Leuven
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- van Winckel, H. (author)
- Katholieke Universiteit Leuven
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- De Nutte, R. (author)
- Royal Observatory of Belgium
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- Dumortier, L. (author)
- Royal Observatory of Belgium
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- Fremat, Y. (author)
- Royal Observatory of Belgium
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- Hensberge, H. (author)
- Royal Observatory of Belgium
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- Jorissen, A. (author)
- Université libre de Bruxelles (ULB)
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- Lampens, P. (author)
- Royal Observatory of Belgium
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- Laverick, M. (author)
- Katholieke Universiteit Leuven
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- Lombaert, Robin, 1986 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Papics, P. I. (author)
- Katholieke Universiteit Leuven
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- Raskin, G. (author)
- Katholieke Universiteit Leuven
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- Sodor, A. (author)
- Royal Observatory of Belgium,Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
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- Thoul, A. (author)
- Universite de Liège,University of Liège
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- Van Eck, S. (author)
- Université libre de Bruxelles (ULB)
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- Waelkens, C. (author)
- Katholieke Universiteit Leuven
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(creator_code:org_t)
- 2016-09-16
- 2017
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 464:1, s. 1018-1028
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Abstract
Subject headings
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- We report on the discovery of a planetary companion candidate with a minimum mass M sin i = 4.6 +/- 1.0 M-Jupiter orbiting the K2 III giant star HD 175370 (KIC 007940959). This star was a target in our programme to search for planets around a sample of 95 giant stars observed with Kepler. This detection was made possible using precise stellar radial velocity measurements of HD 175370 taken over five years and four months using the coude echelle spectrograph of the 2-m Alfred Jensch Telescope and the fibre-fed echelle spectrograph High Efficiency and Resolution Mercator Echelle Spectrograph of the 1.2-m Mercator Telescope. Our radial velocity measurements reveal a periodic (349.5 +/- 4.5 d) variation with a semi-amplitude K = 133 +/- 25 ms(-1), superimposed on a long-term trend. A low-mass stellar companion with an orbital period of similar to 88 yr in a highly eccentric orbit and a planet in a Keplerian orbit with an eccentricity e = 0.22 are the most plausible explanation of the radial velocity variations. However, we cannot exclude the existence of stellar envelope pulsations as a cause for the low-amplitude radial velocity variations and only future continued monitoring of this system may answer this uncertainty. From Kepler photometry, we find that HD 175370 is most likely a low-mass red giant branch or asymptotic giant branch star.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stars: individual: HD 175370 (KIC 007940959)
- methods: data analysis
- techniques: radial velocities
- methods: observational
- techniques: spectroscopic
- planetary systems
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Hrudkova, M.
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Hatzes, A.
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Karjalainen, R.
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Lehmann, H.
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Hekker, S.
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Hartmann, M.
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show more...
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Tkachenko, A.
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Prins, S.
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van Winckel, H.
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De Nutte, R.
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Dumortier, L.
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Fremat, Y.
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Hensberge, H.
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Jorissen, A.
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Lampens, P.
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Laverick, M.
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Lombaert, Robin, ...
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Papics, P. I.
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Raskin, G.
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Sodor, A.
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Thoul, A.
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Van Eck, S.
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Waelkens, C.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Monthly Notices ...
- By the university
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Chalmers University of Technology