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Nonlinear models of the bump cepheid HV 905 and the distance modulus to the large magellanic cloud

Wood, P R and Arnold, A S and Sebo, K M (1997) Nonlinear models of the bump cepheid HV 905 and the distance modulus to the large magellanic cloud. Astrophysical Journal, 485 (1). L25-L28. ISSN 0004-637X

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    Abstract

    Nonlinear pulsation models have been used to simulate the light curve of the LMC bump Cepheid HV 905. In order to reproduce the light curve accurately, tight constraints on the input parameters M, L, and T-eff are required. The results, combined with accurate existing V and I photometry, yield an LMC distance modulus of 18.51 +/- 0.05, and they show that the luminosity of HV 905 is much higher than expected from the mass-luminosity relation of stellar evolution theory. If we assume that the pulsation models are accurate, this suggests that there is a larger amount of convective core overshoot during the main-sequence evolution of stars with M similar to 5 M. than is usually assumed.

    Item type: Article
    ID code: 33636
    Keywords: stars, oscillations, cepheids, magellanic clouds, pulsation, masses, stars , opacities, nonlinear models, bump cepheid, hv 905, distance modulus, Optics. Light, Astronomy and Astrophysics, Space and Planetary Science
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
      Depositing user: Pure Administrator
      Date Deposited: 17 Oct 2011 12:59
      Last modified: 05 Sep 2014 13:11
      URI: http://strathprints.strath.ac.uk/id/eprint/33636

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