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      Orbital solutions of eight close sdB binaries

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      Creators
      Geier, S.
      Oestensen, R.H.
      Heber, U.
      Kupfer, T.
      Maxted, P.F.L.
      Barlow, B.N.
      Vuckovic, M.
      Tilich, A.
      Mueller, S.
      Edelmann, H.
      Classen, L.
      McLeod, A.F.
      Date of Archiving
      2014
      Archive
      ViZieR
      Related links
      http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/562/A95
      Related publications
      Orbital solutions of eight close sdB binaries and constraints on the nature of the unseen companions⋆  
      Publication type
      Dataset
      Access level
      Open access
      Please use this identifier to cite or link to this item: https://hdl.handle.net/2066/151887   https://hdl.handle.net/2066/151887
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      Organization
      Astrophysics
      Audience(s)
      Astronomy, astrophysics
      Key words
      binaries; spectroscopic; subdwarfs
      Abstract
      The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars (sdBs) with massive compact companions such as white dwarfs, neutron stars, or stellar-mass black holes. In a supplementary programme we obtained time-resolved spectroscopy of known hot subdwarf binary candidates. Here we present orbital solutions of eight close sdB binaries with orbital periods ranging from ∼0.1d to 10d, which allow us to derive lower limits on the masses of their companions. Additionally, a dedicated photometric follow-up campaign was conducted to obtain light curves of the reflection-effect binary HS 2043+0615. We are able to constrain the most likely nature of the companions in all cases but one, making use of information derived from photometry and spectroscopy. Four sdBs have white dwarf companions, while another three are orbited by low-mass main sequence stars of spectral type M.
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      • Datasets [1269]
      • Faculty of Science [32153]
       
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