Radboud Repository

      View Item 
      •   Radboud Repository
      • Collections Radboud University
      • Datasets
      • View Item
      •   Radboud Repository
      • Collections Radboud University
      • Datasets
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.
      BrowseAll of RepositoryCollectionsDepartmentsDate IssuedAuthorsTitlesDocument typeThis CollectionDepartmentsDate IssuedAuthorsTitlesDocument type
      StatisticsView Item Statistics

      Analysis of the B3 IV star HD 43317

      Find Full text
      Creators
      Papics, P.I.
      Aerts, Conny
      Auvergne, M.
      Date of Archiving
      2012
      Archive
      ViZieR
      Related links
      https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/542/A55
      DOI
      https://doi.org/10.26093/cds/vizier.35420055
      Related publications
      Gravito-inertial and pressure modes detected in the B3 IV CoRoT target HD 43317  
      Publication type
      Dataset
      Access level
      Open access
      Please use this identifier to cite or link to this item: https://hdl.handle.net/2066/93750   https://hdl.handle.net/2066/93750
      Display more detailsDisplay less details
      Organization
      Astrophysics
      Audience(s)
      Astronomy, astrophysics
      Key words
      asteroseismology; stars variables: general; stars: abundances; stars: oscillations; stars: individual: HD 43317; stars: rotation
      Abstract
      OB stars are important building blocks of the Universe, but we have only a limited sample of them well understood enough from an asteroseismological point of view to provide feedback on the current evolutionary models. Our study adds one special case to this sample, with more observational constraints than for most of these stars. Our goal is to analyse and interpret the pulsational behaviour of the B3 IV star HD 43317 using the CoRoT light curve along with the ground-based spectroscopy gathered by the Harps instrument. This way we continue our efforts to map the Beta Cep and SPB instability strips. We used different techniques to reveal the abundances and fundamental stellar parameters from the newly-obtained high-resolution spectra. We used various time-series analysis tools to explore the nature of variations present in the light curve. We calculated the moments and used the pixel-by-pixel method to look for line profile variations in the high- resolution spectra. We find that HD 43317 is a single fast rotator (vrot∼50%vcrit) and hybrid SPB/Beta Cep-type pulsator with Solar metal abundances. We interpret the variations in photometry and spectroscopy as a result of rotational modulation connected to surface inhomogeneities, combined with the presence of both g and p mode pulsations. We detect a series of ten consecutive frequencies with an almost constant period spacing of 6339s as well as a second shorter sequence consisting of seven frequencies with a spacing of 6380s. The dominant frequencies fall in the regime of gravito- inertial modes.
      This item appears in the following Collection(s)
      • Datasets [1229]
      • Faculty of Science [31860]
       
      •  Upload Full Text
      •  Terms of Use
      •  Notice and Takedown
      Bookmark and Share
      Admin login