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A multi-technique approach to identifying and/or constraining radial-velocity substellar companions

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  • معلومة اضافية
    • Contributors:
      Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA); Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); Institut de Planétologie et d'Astrophysique de Grenoble (IPAG); Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ); Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France; Pixyl; PSL/OCAV; European Project: 885593,COBREX
    • بيانات النشر:
      HAL CCSD
      EDP Sciences
    • الموضوع:
      2023
    • Collection:
      Université Savoie Mont Blanc: HAL
    • نبذة مختصرة :
      International audience ; Context. Although more than one thousand substellar companions have already been detected with the radial velocity (RV) method, many new companions remain to be detected in the public RV archives. Aims. We wish to use the archival data obtained with the ESO/HARPS spectrograph to search for substellar companions. Methods. We used the astronomic acceleration measurements of stars obtained with the HIPPARCOS and Gaia satellites to identify anomalies that could be explained by the presence of a companion. Once hints for a companion were found, we combined the RV data with absolute astrometry data and, when available, relative astrometry data, using a Markov chain Monte Carlo algorithm to determine the orbital parameters and mass of the companion. Results. We find and characterize three new brown dwarfs (GJ 660.1 C, HD 73256 B, and HD 165131 B) and six new planets (HD 75302 b, HD 108202 b, HD 135625 b, HD 185283 b, HIP 10337 b, and HIP 54597 b) with separations between 1 and 6 au and masses between 0.6 and 100 M Jup. We also constrain the orbital inclination of ten known substellar companions and determine their true mass. Finally, we identify twelve new stellar companions. This shows that the analysis of proper motion anomalies enables the optimization of the RV search for substellar companions and their characterization.
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/2308.05417; info:eu-repo/grantAgreement//885593/EU/COupling data and techniques for BReakthroughs in EXoplanetary systems exploration/COBREX; hal-04465851; https://hal.science/hal-04465851; https://hal.science/hal-04465851/document; https://hal.science/hal-04465851/file/aa46612-23.pdf; ARXIV: 2308.05417
    • الرقم المعرف:
      10.1051/0004-6361/202346612
    • الدخول الالكتروني :
      https://hal.science/hal-04465851
      https://hal.science/hal-04465851/document
      https://hal.science/hal-04465851/file/aa46612-23.pdf
      https://doi.org/10.1051/0004-6361/202346612
    • Rights:
      http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.8202984