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  • Van Grootel, V.Universite de Liège,University of Liège (author)

A search for transiting planets around hot subdwarfs: I. Methods and performance tests on light curves from Kepler, K2, TESS, and CHEOPS

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-06-29
  • EDP Sciences,2021

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:fd6ab509-a83f-440d-b256-74eb664ece01
  • https://doi.org/10.1051/0004-6361/202140381DOI
  • https://research.chalmers.se/publication/524831URI
  • https://lup.lub.lu.se/record/1d6815cb-14ff-4b00-be90-bcbd97119896URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-196163URI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Context. Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot and small He-burning objects. These stars constitute excellent opportunities for addressing the question of the evolution of exoplanetary systems directly after the RGB phase of evolution. Aims. In this project we aim to perform a transit survey in all available light curves of hot subdwarfs from space-based telescopes (Kepler, K2, TESS, and CHEOPS) with our custom-made pipeline SHERLOCK in order to determine the occurrence rate of planets around these stars as a function of orbital period and planetary radius. We also aim to determine whether planets that were previously engulfed in the envelope of their red giant host star can survive, even partially, as a planetary remnant. Methods. For this first paper, we performed injection-and-recovery tests of synthetic transits for a selection of representative Kepler, K2, and TESS light curves to determine which transiting bodies in terms of object radius and orbital period we will be able to detect with our tools. We also provide estimates for CHEOPS data, which we analyzed with the pycheops package. Results. Transiting objects with a radius ≤ 1.0 R⊕ can be detected in most of the Kepler, K2, and CHEOPS targets for the shortest orbital periods (1 d and shorter), reaching values as low as ∼0.3 R⊕ in the best cases. Sub-Earth-sized bodies are only reached for the brightest TESS targets and for those that were observed in a significant number of sectors. We also give a series of representative results for larger planets at greater distances, which strongly depend on the target magnitude and on the length and quality of the data. Conclusions. The TESS sample will provide the most important statistics for the global aim of measuring the planet occurrence rate around hot subdwarfs. The Kepler, K2, and CHEOPS data will allow us to search for planetary remnants, that is, very close and small (possibly disintegrating) objects.

Subject headings and genre

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  • Pozuelos, Francisco J.Universite de Liège,University of Liège (author)
  • Thuillier, A.Universite de Liège,University of Liège (author)
  • Charpinet, S.Université de Toulouse,University of Toulouse (author)
  • Delrez, L.Universite de Liège,University of Liège,Université de Genève,University of Geneva (author)
  • Beck, M.Université de Genève,University of Geneva,Lund University (author)
  • Fortier, A.Universität Bern,University of Bern (author)
  • Hoyer, S.Laboratoire d'Astrophysique de Marseille (author)
  • Sousa, S.G.Universidade do Porto,University of Porto (author)
  • Barlow, B. N.High Point University (author)
  • Billot, N.Université de Genève,University of Geneva (author)
  • Dévora-Pajares, M.Universidad de Granada,Universidad Internacional de Valencia,Valencian International University (author)
  • Østensen, R. H.Missouri State University (author)
  • Alibert, Y.Universität Bern,University of Bern (author)
  • Alonso, R.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Anglada Escude´, G.Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
  • Asquier, J.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Barrado, D.European Space Astronomy Centre (ESAC) (author)
  • Barros, S.C.C.Universidade do Porto,University of Porto (author)
  • Baumjohann, W. (author)
  • Beck, T.Universität Bern,University of Bern (author)
  • Bekkelien, A.Université de Genève,University of Geneva (author)
  • Benz, W.Universität Bern,University of Bern (author)
  • Bonfils, X.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Brandeker, AlexisStockholms universitet,Institutionen för astronomi(Swepub:su)alexis (author)
  • Broeg, C.Universität Bern,University of Bern (author)
  • Bruno, G.Istituto nazionale di astrofisica (INAF) (author)
  • Bárczy, T. (author)
  • Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Cameron, A.C.University of St Andrews (author)
  • Charnoz, S. (author)
  • Davies, Melvyn B.Lunds universitet,Lund University (author)
  • Deleuil, M.Laboratoire d'Astrophysique de Marseille (author)
  • Demangeon, O.Universidade do Porto,University of Porto (author)
  • Demory, B.O.Universität Bern,University of Bern (author)
  • Ehrenreich, D.Université de Genève,University of Geneva (author)
  • Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Fossati, L. (author)
  • Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)(Swepub:cth)malfri (author)
  • Futyan, D.Université de Genève,University of Geneva (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Gillon, MichaëlUniversite de Liège,University of Liège (author)
  • Guedel, M.Universität Wien,University of Vienna (author)
  • Heng, KevinThe University of Warwick,Universität Bern,University of Bern (author)
  • Isaak, K.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Kiss, L.The University of Sydney,Eötvös Loránd University (ELTE),Magyar Tudomanyos Akademia,Hungarian Academy of Sciences (author)
  • Laskar, J.Observatoire de Paris,Paris Observatory (author)
  • des Etangs, A. L.Institut d 'Astrophysique de Paris (author)
  • Lendl, M.Université de Genève,University of Geneva (author)
  • Lovis, C.Université de Genève,University of Geneva (author)
  • Magrin, D.Istituto nazionale di astrofisica (INAF) (author)
  • Maxted, P.Keele University (author)
  • Mecina, M.Universität Wien,University of Vienna (author)
  • Mustill, Alexander JLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-amu (author)
  • Nascimbeni, ValerioIstituto nazionale di astrofisica (INAF) (author)
  • Olofsson, GöranStockholms universitet,Institutionen för astronomi(Swepub:su)olofsson (author)
  • Ottensamer, R.Universität Wien,University of Vienna (author)
  • Pagano, I.Istituto nazionale di astrofisica (INAF) (author)
  • Palle, E.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Peter, G.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Piotto, Giampaolo P.Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Plesseria, J. Y.Universite de Liège,University of Liège (author)
  • Pollacco, Don L.The University of Warwick (author)
  • Queloz, D.University Of Cambridge,Université de Genève,University of Geneva (author)
  • Ragazzoni, RobertoUniversità Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Rando, N.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Rauer, H.Technische Universität Berlin,Freie Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Ribas, I.Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC),Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC (author)
  • Santos, N. C.Universidade do Porto,University of Porto (author)
  • Scandariato, GaetanoIstituto nazionale di astrofisica (INAF) (author)
  • Segransan, D.Université de Genève,University of Geneva (author)
  • Silvotti, R.Istituto nazionale di astrofisica (INAF) (author)
  • Simon, A.E.Universität Bern,University of Bern (author)
  • Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Steller, Manfred B. (author)
  • Szabó, G.M.Eötvös Loránd University (ELTE) (author)
  • Thomas, NicolasUniversität Bern,University of Bern (author)
  • Udry, S.Université de Genève,University of Geneva (author)
  • Viotto, V.Istituto nazionale di astrofisica (INAF) (author)
  • Walton, N. A.University Of Cambridge (author)
  • Westerdorff, K.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Wilson, T.G.University of St Andrews (author)
  • Universite de LiègeUniversity of Liège (creator_code:org_t)

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  • In:Astronomy and Astrophysics: EDP Sciences6500004-63611432-0746

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Van Grootel, V.
Pozuelos, Franci ...
Thuillier, A.
Charpinet, S.
Delrez, L.
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Alonso, R.
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