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

Автор(и)

  • N. A. Drake Sobolev Astronomical Institute, St. Petersburg State University, Universitetski pr., 28, St. Petersburg 198504, Russia, Російська Федерація
  • E. G. Jilinski Observatorio Nacional/MCT, Rua Gen. Jose Cristino, 77, Rio de Janeiro 20921-400, Brazil; Pulkovo Observatory, Russian Academy of Sciences, St. Petersburg 196140, Russia, Бразилія
  • V. G. Ortega Observatorio Nacional/MCT, Rua Gen. Jose Cristino, 77, Rio de Janeiro 20921-400, Brazil, Бразилія
  • R. de la Reza Observatorio Nacional/MCT, Rua Gen. Jose Cristino, 77, Rio de Janeiro 20921-400, Brazil, Бразилія
  • B. Bazzanella Observatorio Nacional/MCT, Rua Gen. Jose Cristino, 77, Rio de Janeiro 20921-400, Brazil, Бразилія

DOI:

https://doi.org/10.18524/1810-4215.2008.21.87014

Ключові слова:

Stars, magnetic fields, stars, individual, HD 158450, HD 66318

Анотація

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.

Посилання

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Опубліковано

2008-12-21

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