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Lithium lines in the spectra of M dwarfs: UX Tau C

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Abstract

The results of numerical modeling of lithium lines in the spectra of M dwarfs are discussed. The behavior of the lithium lines relative to the local pseudocontinuum formed by molecular bands is analyzed as a function of model atmosphere parameters: effective temperature T eff, gravity logg, and metallicity μ The molecular opacity was computed using the just overlapping line approximation (JOLA) and “line-by-line” methods. The pseudo-equivalent widths of lithium lines depend appreciably on metallicity μ and weakly on T{nteff}. The lithium abundance in the atmosphere of UX Tau C is redetermined. Previous studies underestimated the lithium abundance in this star as a result of the use of insufficiently accurate molecular-line lists. The new lithium abundance log N (Li)=3.2±0.3was derived by comparing the observed profiles of the 670.8 nm resonance doublet lines with profiles calculated using the new TiO line list of Plez.1 The new abundance agrees with the atmospheric lithium abundances of the other two components in the stellar system, providing further evidence that the three stars in the UX Tau system have the same age. A comparison of the observed spectra of UX Tau C near the lithium resonance doublet (665–680 nm) with spectra computed using JOLA and line-by-line methods suggests that the list of Plez is the best currently available.

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References

  1. F. D'Antona and I. Mazitelli, Astrophys. J., Suppl. Ser. 90, 467 (1994).

    Article  ADS  Google Scholar 

  2. A. Magazzù, R. Rebolo, and Ya. V. Pavlenko, Astrophys. J. 392, 159 (1992).

    ADS  Google Scholar 

  3. R. Rebolo, E. L. Martin, and A. Magazzù, Astrophys. J. Lett. 389, L83 (1992).

    Article  ADS  Google Scholar 

  4. A. Magazzù, E. L. Martin, and R. Rebolo, Astrophys. J. Lett. 404, L17 (1993).

    ADS  Google Scholar 

  5. E. L. Martin, R. Rebolo, and M. R. Zapatero-Osorio, Astrophys. J. 469, 706 (1996).

    Article  ADS  Google Scholar 

  6. M. R. Zapatero-Osorio, R. Rebolo, E. L. Martin, et al., Astrophys. J. 491, L81 (1997).

    ADS  Google Scholar 

  7. R. Rebolo, E. L. Martin, and M. R. Zapatero-Osorio, Low Mass Stars and Brown Dwarfs in Stellar Clusters and Associations (in press).

  8. R. Rebolo, G. Basri, G. Marcy, et al., Astrophys. J. 469, L53 (1996).

    Article  ADS  Google Scholar 

  9. E. L. Martin, R. Rebolo, A. Magazzù, et al., Astron. Astrophys. 282, 503 (1994).

    ADS  Google Scholar 

  10. R. J. García López, R. Rebolo, and E. Martin, Astron. Astrophys. 282, 518 (1994).

    ADS  Google Scholar 

  11. M. R. Zapatero-Osorio, E. L. Martin, and R. J. García López, Astron. Astrophys. 305, 519 (1996).

    ADS  Google Scholar 

  12. B. R. Oppenheimer, G. Basri, T. Nakajima, et al., Astron. J. 113, 296 (1997).

    ADS  Google Scholar 

  13. Ya. V. Pavlenko, R. Rebolo, E. L. Martin, et al., Astron. Astrophys. 308, 807 (1995).

    ADS  Google Scholar 

  14. A. Magazzù, E. L. Martin, and R. Rebolo, Astron. Astrophys. 249, 149 (1991).

    ADS  Google Scholar 

  15. F. Allard, Ph.D. Dissertation (Univ. Heidelberg, 1990).

  16. F. Pozio, Mem. Soc. Astron. Ital. 62, 171 (1991).

    ADS  Google Scholar 

  17. T. Tsuji, Astron. Astrophys. 23, 411 (1973).

    ADS  Google Scholar 

  18. F. Allard and P. Hauschildt, Astrophys. J. 445, 433 (1995).

    Article  ADS  Google Scholar 

  19. Ya. V. Pavlenko, Astron. Astrophys. 253, 43 (1997).

    Google Scholar 

  20. Ya. V. Pavlenko, Astron. Zh. 74, 608 (1997).

    ADS  Google Scholar 

  21. G. W. Marcy, G. Basri, and J. R. Graham, Astrophys. J. Lett. 428, L57 (1994).

    Article  ADS  Google Scholar 

  22. R. L. Kurucz, CD ROM No. 15 (1993).

  23. B. Plez, Astron. Astrophys. 337, 495 (1998).

    ADS  Google Scholar 

  24. D. Schwenke, Faraday Discuss. 109, 321 (1998).

    Article  Google Scholar 

  25. C. Abia, H. M. J. Boffin, J. Isern, et al., Astron. Astrophys. 272, 455 (1993).

    ADS  Google Scholar 

  26. G. Basri and G. W. Marcy, Astron. J. 109, 762 (1995).

    Article  ADS  Google Scholar 

  27. B. Plez, V. V. Smith, and L. L. Lambert, Astrophys. J. 418, 812 (1993).

    Article  ADS  Google Scholar 

  28. H. Steenbock and H. Holweger, Astron. Astrophys. 130, 319 (1984).

    ADS  Google Scholar 

  29. Ya. V. Pavlenko and A. Magazzù, Astron. Astrophys. 311, 961 (1996).

    ADS  Google Scholar 

  30. E. R. Houdebine and J. G. Doyle, Astron. Astrophys. 302, 861 (1995).

    ADS  Google Scholar 

  31. Ya. V. Pavlenko, Astron. Zh. 75, 567 (1998).

    Google Scholar 

  32. H. R. A. Jones and T. Tsuji, Astrophys. J. Lett. 480, L39 (1997).

    Article  ADS  Google Scholar 

  33. Ya. V. Pavlenko, Astron. Zh. 75, 888 (1998).

    Google Scholar 

  34. C. G. Tinney, X. Delfosse, T. Forveille, et al., Astron. Astrophys. 338, 1066 (1998).

    ADS  Google Scholar 

  35. T. Tsuji, K. Ohnaka, and W. Aoki, Astron. Astrophys. 305, L1 (1996).

    ADS  Google Scholar 

  36. Ya. V. Pavlenko, M. R. Zapatero-Osorio, and R. Rebolo, Low Mass Stars and Brown Dwarfs in Stellar Clusters and Associations (in press).

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  1. Main Astronomical Observatory, Goloseevo, Kiev-127, 03680, Ukraine

    Ya. V. Pavlenko

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  1. Ya. V. Pavlenko
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__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 77, No. 4, 2000, pp. 254–263.

Original Russian Text Copyright © 2000 by Pavlenko.

1 See Astron. Astrophys. 337, 495 (1998).

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Pavlenko, Y.V. Lithium lines in the spectra of M dwarfs: UX Tau C. Astron. Rep. 44, 219–226 (2000). https://doi.org/10.1134/1.163844

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