Odessa Astronomical Publications (Dec 2008)

HD 158450: A MAGNETIC CHEMICALLY PECULIAR STAR IN A YOUNG STELLAR GROUP

  • N. A. Drake,
  • E. G. Jilinski,
  • V. G. Ortega,
  • R. de la Reza,
  • B. Bazzanella

DOI
https://doi.org/10.18524/1810-4215.2008.21.87014
Journal volume & issue
Vol. 21, no. 0
pp. 35 – 36

Abstract

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We report on the discovery of the Zeeman resolved spectral lines, corresponding to the very large magnetic field modulus [H] = 11.1 kG, in the spectrum of the chemically peculiar star HD 158450 belonging to the recently discovered Mamajek 2 stellar group. We determined fundamental parameters and projected rotation velocity of the star. Dynamical 3D mean orbit calculations showed that Mamajek 2 stellar group has an age of 135+-5 Myr. Based on this age, we estimate that HD 158450 has completed about 12of its main-sequence life. The importance of the detailed study of HD 158450, a member of a stellar group with a well determined age, for understanding the origin and evolution of stellar magnetic fields is discussed.