CHEMICAL COMPOSITION OF APPROXIMATELY EQUAL MASS Hg-Mn COMPONENTS OF THE SB2 SYSTEM 46 Draconis

Автор(и)

  • V. V. Tsymbal Simferopol State University, Ukraine
  • O. P. Kotchoukhov Simferopol State University, Ukraine
  • D. L. Lambert Department of Astronomy, University of Texas at Austin, United States
  • V. L. Khokhlova Institute of Astronomy, Russian Academy of Sciences, Russian Federation

DOI:

https://doi.org/10.18524/1810-4215.1997.10.105426

Ключові слова:

Stars, Abundances, 46 Dra

Анотація

We report results of the most complete up to date elemental abundance analysis of approximately equal mass Hg-Mn components of chemically-peculiar SB2 system 46 Dra. The highdispersion S/N≥200 CCD spectrum were obtained with the echelle spectrograph of the McDonald Observatory 2.7-m reflector. Lines in the wide spectral region of 3800-9000 Å were identified and the chemical composition of each component was determined for 25 elements. Chemical anomalies of both components are found to be roughly similar: He, C, N, O and Al deficiency, nearly normal abundance of iron-peak elements, large excesses of P,  Mn, Ga, Sr, Y, Zr, Ba, Pt, Au and Hg which show a common trend with atomic number. However we found significant abundance differences between the components especially for Ne, Al, S, V, Mn, Ni, Ga, Sr, Zr and Pt.

Посилання

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Опубліковано

2017-06-27

Номер

Том 10 (1997)

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Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року