Robust asteroseismic properties of the bright planet host HD 38529

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  • Warrick H. Ball, University of Birmingham
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  • William J. Chaplin, University of Birmingham
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  • Martin B. Nielsen, School of Physics and Astronomy, University of Birmingham, Edgbaston Birmingham, B15 2TT, Aarhus Universitet
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  • Lucia González-Cuesta, Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-8205 La Laguna, Spain
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  • Savita Mathur, Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-8205 La Laguna, Spain
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  • Ângela R. G. Santos, Space Science Institute, 4765 Walnut Street, Suite B, Boulder, CO 80301, USA
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  • Rafael García, Lab. AIM, CEA/DSM-CNRS-Universite ́ Paris Diderot; CEA, IRFU, SAp, Saclay, 91191, Gif-sur-Yvette, France
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  • Derek Buzasi, Department of Chemistry and Physics, Florida Gulf Coast University, 10501 FGCU Blvd., Fort Myers, FL 33965 USA
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  • Benoît Mosser, LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Université, Université Paris Diderot, F-92195 Meudon, France
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  • Morgan Deal, Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
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  • Amalie Stokholm
  • Jakob Rørsted Mosumgaard
  • Victor Silva Aguirre
  • Benard Nsamba, Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, Rua das Estrelas, PT-4150-762 Porto, Portugal 0000-0002-4647-2068
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  • Tiago Campante, Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, Rua das Estrelas, PT-4150-762 Porto, Portugal 0000-0002-4588-5389
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  • Margarida S. Cunha, School of Physics and Astronomy, University of Birmingham, Edgbaston Birmingham, B15 2TT
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  • Joel Ong, Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA 0000-0001-7664-648X
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  • Sarbani Basu, Department of Astronomy, Yale University, Post Office Box 208101, New Haven, CT 06520-8101, USA
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  • Sibel Örtel, Department of Astronomy and Space Sciences, Science Faculty, Ege University, 35100, Bornova, İzmir, Turkey
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  • Z. Çelik Orhan, Department of Astronomy and Space Sciences, Science Faculty, Ege University, 35100 Bornova, İzmir, Turkey 0000-0002-9424-2339
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  • Mutlu Yıldız, Department of Astronomy and Space Sciences, Science Faculty, Ege University, 35100, Bornova, İzmir, Turkey
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  • Keivan Stassun, Department of Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, Nashville, TN, 37235, USA 0000-0002-3481-9052
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  • Stephen R. Kane, Department of Earth and Planetary Sciences, University of California Riverside, 900 University Ave, Riverside, CA 92521, USA
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  • Daniel Huber, Institute for Astronomy, University of Hawai'i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
The Transiting Exoplanet Survey Satellite (TESS) is recording short-cadence, high duty-cycle timeseries across most of the sky, which presents the opportunity to detect and study oscillations in interesting stars, in particular planet hosts. We have detected and analysed solar-like oscillations in the bright G4 subgiant HD 38529, which hosts an inner, roughly Jupiter-mass planet on a $14.3\, \mathrm{d}$ orbit and an outer, low-mass brown dwarf on a $2136\, \mathrm{d}$ orbit. We combine results from multiple stellar modelling teams to produce robust asteroseismic estimates of the star's properties, including its mass $M=1.48\pm 0.04\, \mathrm{M}_\odot {}$ , radius $R=2.68\pm 0.03\, \mathrm{R}_\odot {}$ , and age $t=3.07\pm 0.39\, \mathrm{Gyr}{}$ . Our results confirm that HD 38529 has a mass near the higher end of the range that can be found in the literature and also demonstrate that precise stellar properties can be measured given shorter timeseries than produced by CoRoT, Kepler, or K2.
OriginalsprogEngelsk
TidsskriftMonthly Notices of the Royal Astronomical Society
Vol/bind499
Nummer4
Sider (fra-til)6084-6093
Antal sider10
ISSN0035-8711
DOI
StatusUdgivet - dec. 2020

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