Reference : The discovery of a planetary candidate around the evolved low-mass Kepler giant star ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/213394
The discovery of a planetary candidate around the evolved low-mass Kepler giant star HD 175370
English
Hrudková, M. mailto [Isaac Newton Group of Telescopes, Apartado de Correos 321, Santa Cruz de La Palma E-38700, Spain]
Hatzes, A. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg D-07778, Germany]
Karjalainen, R. [Isaac Newton Group of Telescopes, Apartado de Correos 321, Santa Cruz de La Palma E-38700, Spain]
Lehmann, H. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg D-07778, Germany]
Hekker, S. [Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, Göttingen D-37077, Germany; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C DK-8000, Denmark]
Hartmann, M. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg D-07778, Germany]
Tkachenko, A. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
Prins, S. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
Van Winckel, H. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
De Nutte, R. [Royal Observatory of Belgium, 3 Avenue Circulaire, Brussel B-1180, Belgium]
Dumortier, L. [Royal Observatory of Belgium, 3 Avenue Circulaire, Brussel B-1180, Belgium]
Frémat, Y. [Royal Observatory of Belgium, 3 Avenue Circulaire, Brussel B-1180, Belgium]
Hensberge, H. [Royal Observatory of Belgium, 3 Avenue Circulaire, Brussel B-1180, Belgium]
Jorissen, A. [Institut d' Astronomie et d' Astrophysique, Université Libre de Bruxelles, CP 226, Boulevard du Triomphe, Bruxelles B-1050, Belgium]
Lampens, P. [Royal Observatory of Belgium, 3 Avenue Circulaire, Brussel B-1180, Belgium]
Laverick, M. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
Lombaert, R. [Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden; Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
Pápics, P. I. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
Raskin, G. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium]
Sódor, Á. [Royal Observatory of Belgium, 3 Avenue Circulaire, Brussel B-1180, Belgium; Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budapest 1121, Hungary]
Thoul, Anne mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Van Eck, S. [Institut d' Astronomie et d' Astrophysique, Université Libre de Bruxelles, CP 226, Boulevard du Triomphe, Bruxelles B-1050, Belgium]
Waelkens, C. [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven B-3001, Belgium)]
1-Jan-2017
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
464
1018-1028
Yes (verified by ORBi)
0035-8711
1365-2966
Oxford
United Kingdom
[en] methods: data analysis ; methods: observational ; techniques: radial velocities ; techniques: spectroscopic ; stars: individual: HD 175370 (KIC 007940959) ; planetary systems
[en] We report on the discovery of a planetary companion candidate with a minimum mass M sin i = 4.6 ± 1.0 M[SUB]Jupiter[/SUB] 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 coudé 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 m s[SUP]- 1[/SUP], superimposed on a long-term trend. A low-mass stellar companion with an orbital period of ˜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.
Researchers ; Professionals
http://hdl.handle.net/2268/213394
10.1093/mnras/stw2379
http://adsabs.harvard.edu/abs/2017MNRAS.464.1018H

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
stw2379.pdfPublisher postprint1.82 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.