The signature of diffusion in the binary system of omicron Leonis: a key for AmFm scenarios?

详细信息    查看全文

• 作者：M. Gebran ; P. Hadrava ; G. Jasniewicz ; O. Richard
• 关键词：Binaries ; spectroscopic ; Stars ; abundances ; Stars ; main sequence ; Stars ; rotation ; Diffusion
• 刊名：Astrophysics and Space Science
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：357
• 期：2
• 全文大小：1,667 KB
• 参考文献：Alecian, G.: Astrophys. J. 310, 872 (1996) ADS
  Bagnuolo, W.G. Jr., Gies, D.R.: Astrophys. J. 376, 266 (1991) ADS View Article
  Gebran, M., Monier, R., Richard, O.: Astrophys. J. 479, 189 (2008) ADS
  Grevesse, N., Sauval, A.J.: Space Sci. Rev. 85, 161 (1998) ADS View Article
  Griffin, R.E.: Astron. J. 123, 988 (2002) ADS View Article
  Hadrava, P.: Astron. Astrophys. Suppl. Ser. 114, 393 (1995) ADS
  Hadrava, P.: Publ. No. - Astron. Inst. Czechoslov. Acad. Sci. 92, 1 (2004a) ADS
  Hadrava, P.: Publ. No. - Astron. Inst. Czechoslov. Acad. Sci. 92, 15 (2004b) ADS
  Hadrava, P.: IAU Symposium, vol.?282, p.?351 (2012)
  Hummel, C.A., Carquillat, J.-M., Ginestet, N., et al.: Astron. J. 121, 1623 (2001) ADS View Article
  Kurucz, R.L.: Rev. Mex. Astron. Astrofís. 23, 45 (1992) ADS
  Michaud, G., Richer, J., Richard, O.: Astrophys. J. 623, 442 (2005) ADS View Article
  Michaud, G., Tarasick, D., Charland, Y., Pelletier, C.: Astrophys. J. 269, 239 (1983) ADS View Article
  Palacios, A., Gebran, M., Josselin, E., et al.: Astrophys. J. 516, AA13 (2010)
  Richard, O., Michaud, G., Richer, J.: Astrophys. J. 558, 377 (2001) ADS View Article
  Richer, J., Michaud, G., Turcotte, S.: Astrophys. J. 529, 338 (2000) ADS View Article
  Smith, M.A.: Astrophys. J. Suppl. Ser. 25, 277 (1973) ADS View Article
  Takeda, Y.: Publ. Astron. Soc. Jpn. 47, 287 (1995) ADS
  Tody, D.: Astronomical Data Analysis Software and Systems II, vol.?52, p.?173 (1993)
  Turcotte, S., Richer, J., Michaud, G., Iglesias, C.A., Rogers, F.J.: Astrophys. J. 504, 539 (1998) ADS View Article
  Vauclair, G., Vauclair, S., Michaud, G.: Astrophys. J. 223, 920 (1978) ADS View Article
  Vauclair, S., Vauclair, G.: Annu. Rev. Astron. Astrophys. 20, 37 (1982) ADS View Article
  Vick, M., Michaud, G., Richer, J., Richard, O.: Astrophys. J. 521, AA62 (2010)
  Watson, W.D.: Astrophys. J. 13, 263 (1971) ADS
  
• 作者单位：M. Gebran (1)
  P. Hadrava (2)
  G. Jasniewicz (3)
  O. Richard (3)
  
  1. Department of Physics and Astronomy, Notre Dame University-Louaize, PO Box 72, Zouk Mikael, Lebanon
  2. Astronomical Institute, Academy of Sciences, Bo?ní II 1401, 141 31, Praha 4, Czech Republic
  3. Laboratoire Univers et Particules de Montpellier, UMR 5299, Université de Montpellier, Place Eugène Bataillon, 34095, Montpellier, France
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  
• 出版者：Springer Netherlands
• ISSN：1572-946X

文摘

Abundances of 14 chemical elements have been derived for the two components of the double-lined AmFm spectroscopic binary o?Leonis in order to set constraints on the main physical processes that lead to the Am star phenomenon. The tomographic image reconstruction and Fourier disentangling techniques were used in order to recover individual spectra from the composite spectra of the binary system observed in 9 nights using the SOPHIE spectrograph at the Observatoire de Haute Provence. Abundances have been derived by iteratively adjusting synthetic spectra to the normalized spectra of the two components by chi-squared minimization. The abundance determinations made in this paper clearly show that both components of the o?Leonis binary system exhibit Am characteristics. Comparison with self-consistent evolutionary models including atomic diffusion and turbulence or mass loss shows a good agreement. This is in favor of the scenario in which element separation occurs relatively deep in the star.