Skip to main content
SpringerLink
Log in

High-latitude supergiant V5112 Sgr: Enrichment of the envelope with heavy s-process metals

  • Published:
Astronomy Letters Aims and scope Submit manuscript

    We’re sorry, something doesn't seem to be working properly.

    Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Abstract

High-resolution (R = 60 000) echelle spectroscopy of the post-AGB supergiant V5112 Sgr performed in 1996–2012 with the 6-m BTA telescope has revealed peculiarities of the star’s optical spectrum and has allowed the variability of the velocity field in the stellar atmosphere and envelope to be studied in detail. An asymmetry and splitting of strong absorption lines with a low lower-level excitation potential have been detected for the first time. The effect is maximal in Ba II lines whose profile is split into three components. The profile shape and positions of the split lines change with time. The short-wavelength components of the split absorption lines are shown to be formed in a structured circumstellar envelope, suggesting an efficient dredge-up of the heavy metals produced during the preceding evolution of this star into the envelope. The envelope expansion velocities have been estimated to be V exp ≈ 20 and 30 km s−1. The mean radial velocity from diffuse bands in the spectrum of V5112 Sgr coincides with that from the short-wavelength shell component of the Na I D lines, which leads to the conclusion about their formation in the circumstellar envelope. Analysis of the set of radial velocities V r based on symmetric absorption lines has confirmed the presence of pulsations in the stellar atmosphere with an amplitude ΔV r ≤ 8 km s−1.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. V. P. Arhipova, N. P. Ikonnikova, and G. V. Komissarova, Astron. Lett. 36, 268 (2010).

    ADS  Google Scholar 

  2. E. J. Bakker, E. F. van Dishoeck, L. B. F. M. Waters, and T. Schoenmaker, Astron. Astrophys. 323, 469 (1997).

    ADS  Google Scholar 

  3. A. Bartkevicius, Baltic Astron. 1, 194 (1992).

    ADS  Google Scholar 

  4. V. Bujarrabal, J. Alcolea, and P. Planesas, Astron. Astrophys. 257, 701 (1992).

    ADS  Google Scholar 

  5. V. Bujarrabal, A. Castro-Carrizo, J. Alcolea, and C. Sanchez Contreras, Astron. Astrophys. 377, 868 (2001).

    Article  ADS  Google Scholar 

  6. L. Decin, H. van Winckel, C. Waelkens, and E. J. Bakker, Astron. Astrophys. 332, 928 (1998).

    ADS  Google Scholar 

  7. G. A. Galazutdinov, Preprint Spets. Astrofiz. Observ. No. 92 (SAO RAN, Zelenchuk, 1992).

    Google Scholar 

  8. T. M. Gledhill, A. Chrysostomou, J. H. Hough, and J. A. Yates, Mon. Not. R. Astron. Soc. 322, 321 (2001).

    Article  ADS  Google Scholar 

  9. Ch. Guilain and N. Mauron, Astron. Astrophys. 314, 585 (1996).

    ADS  Google Scholar 

  10. L. M. Hobbs, D.G. York, T. P. Snow, et al., Astrophys. J. 680, 1256 (2008).

    Article  ADS  Google Scholar 

  11. B. J. Hrivnak, Astrophys. J. 438, 341 (1995).

    Article  ADS  Google Scholar 

  12. B. Hrivnak, S. Kwok, and K. M. Volk, Astrophys. J. 346, 265 (1989).

    Article  ADS  Google Scholar 

  13. B. J. Hrivnak, W. Lu, R. E. Maupin, and B. D. Spitzbart, Astrophys. J. 709, 1042 (2010).

    Article  ADS  Google Scholar 

  14. B. J. Hrivnak, W. Lu, K. L. Wefel, et al., Astrophys. J. 734, 25 (2011).

    Article  ADS  Google Scholar 

  15. P. J. Huggins, N. Mauron, and E. A. Wirth, Mon.Not. R. Astron. Soc. 396, 1805 (2009).

    Article  ADS  Google Scholar 

  16. N. Kameswara Rao, A. Goswami, and D. L. Lambert, Mon. Not. R. Astron. Soc. 334, 129 (2002).

    Article  ADS  Google Scholar 

  17. V. G. Klochkova, Mon. Not. R. Astron. Soc. 272, 710 (1995).

    ADS  Google Scholar 

  18. V. G. Klochkova, Bull. Spec. Astrophys. Obs. 44, 5 (1997).

    ADS  Google Scholar 

  19. V. G. Klochkova, Astron. Lett. 35, 457 (2009).

    Article  ADS  Google Scholar 

  20. V. G. Klochkova, Astrophys. Bull. 67, 385 (2012).

    Article  ADS  Google Scholar 

  21. V. G. Klochkova and V. E. Panchuk, Astron. Rep. 56, 104 (2012).

    Article  ADS  Google Scholar 

  22. V. G. Klochkova and N. S. Tavolganskaya, Astrophys. Bull. 65, 18 (2010).

    Article  ADS  Google Scholar 

  23. V. G. Klochkova and E. L. Chentsov, Astron. Rep. 48, 301 (2004).

    Article  ADS  Google Scholar 

  24. V. G. Klochkova and E. L. Chentsov, Astron. Rep. 51, 994 (2007).

    Article  ADS  Google Scholar 

  25. V. G. Klochkova, R. Szczerba, V. E. Panchuk, and K. Volk, Astron. Astrophys. 345, 905 (1999).

    ADS  Google Scholar 

  26. V. G. Klochkova, R. Szczerba, and V. E. Panchuk, Astron. Lett. 26, 88 (2000).

    Article  ADS  Google Scholar 

  27. V. G. Klochkova, M. V. Yushkin, A. S. Miroshnichenko, V. E. Panchuk, and K. Bjorkman, Astron. Astrophys. 382, 143 (2002).

    Article  ADS  Google Scholar 

  28. V. G. Klochkova, V. E. Panchuk, M. V. Yushkin, and A. S. Miroshnichenko, Astron. Rep. 48, 288 (2004).

    Article  ADS  Google Scholar 

  29. V. G. Klochkova, V. E. Panchuk, N. S. Tavolzhanskaya, and G. Zhao, Astron. Rep. 50, 232 (2006).

    Article  ADS  Google Scholar 

  30. V. G. Klochkova, E. L. Chentsov, N. S. Tavolzhanskaya, and V. E. Panchuk, Astron. Rep. 48, 642 (2004a).

    Google Scholar 

  31. V. G. Klochkova, E. L. Chentsov, N. S. Tavolganskaya, and M. V. Shapovalov, Astrophys. Bull. 62, 162 (2007b).

    Article  ADS  Google Scholar 

  32. V. G. Klochkova, V. E. Panchuk, E. L. Chentsov, and M. V. Yushkin, Astrophys. Bull. 62, 217 (2007v).

    Article  ADS  Google Scholar 

  33. V. G. Klochkova, E. L. Chentsov, and V. E. Panchuk, Astrophys. Bull. 63 112 (2008a).

    Article  ADS  Google Scholar 

  34. V. G. Klochkova, V. E. Panchuk, M. V. Yushkin, and D. S. Nasonov, Astrophys. Bull. 63, 386 (2008b).

    Article  ADS  Google Scholar 

  35. V. G. Klochkova, V. E. Panchuk, and N. S. Tavolganskaya, Astrophys. Bull. 64, 155 (2009).

    Article  ADS  Google Scholar 

  36. V.G. Klochkova, V. E. Panchuk, and N. S. Tavolzhanskaya, Astron. Rep. 54, 234 (2010).

    Article  ADS  Google Scholar 

  37. N. Koning, S. Kwok, and W. Steffen, Astrophys. J. 765, 92 (2013).

    Article  ADS  Google Scholar 

  38. S. Kwok, Ann. Rev. Astron. Astrophys. 31, 63 (1993).

    Article  MathSciNet  ADS  Google Scholar 

  39. S. Kwok, K. M. Volk, and B. Hrivnak, Astrophys. J. 345, L51 (1989).

    Article  ADS  Google Scholar 

  40. S. Kwok, K. M. Volk, and B. Hrivnak, in Asymptotic Giant Branch Stars, Proceedings of the IAU Symposium No. 191, Ed. by T. Le Bertre, A. Lèbre, and C. Waelkens (Astron. Soc. of the Pacific, San Francisco, USA, 1999), p. 297.

  41. E. Lagadec, T. Verhoelst, D. Mekarnia, et al., Mon. Not. R. Astron. Soc. 417 32 (2011).

    Article  ADS  Google Scholar 

  42. M. L. Leal-Ferreira, W. H. T. Vlemmings, P. J. Diamond, et al., Astron.Astrophys. 540, A42 (2012).

    Article  ADS  Google Scholar 

  43. C. Loup, T. Forveille, A. Omont, and J. P. Paul, Astron. Astrophys. Suppl. Ser. 99, 291 (1993).

    ADS  Google Scholar 

  44. R. Luna, T. L. X. Cox, M. A. Satorre, et al., Astron. Astrophys. 480, 133 (2008).

    Article  ADS  Google Scholar 

  45. N. Mauron and P. J. Huggins, Astron. Astrophys. 513, A31 (2010).

    Article  ADS  Google Scholar 

  46. J. Nakashima, N. Koning, S. Kwok, and Y. Zhang, Astrophys. J. 692, 402 (2009).

    Article  ADS  Google Scholar 

  47. V. E. Panchuk, V. G. Klochkova, G. A. Galazutdinov, V. P. Ryadchenko, and E. L. Chentsov, Astron. Lett. 19, 431 (1993).

    ADS  Google Scholar 

  48. V. Panchuk, V. Klochkova, M. Yushkin, and I. Najdenov, in The UV Universe: Stars from Birth to Death, Proceedings of the Joint Discussion No. 4 during the IAU General Assembly of 2006, Ed. by A. I. Gomez de Castro and M. A. Barstow (Editorial Complutense, Madrid, 2007), p. 179.

  49. V. E. Panchuk, V. G. Klochkova, M. V. Yushkin, and I. D. Naidenov, J. of Optical Technology 76, 42 (2009).

    Google Scholar 

  50. M. Parthasarathy, S. R. Pottash, and W. Wamsteker, Astron. Astrophys. 203, 117 (1988).

    ADS  Google Scholar 

  51. B. E. Reddy, M. Parthasarathy, G. Gonzalez, and E. J. Bakker, Astron. Astrophys. 328, 331 (1997).

    ADS  Google Scholar 

  52. B. E. Reddy, D. L. Lambert, G. Gonzalez, and D. Yong, Astrophys. J. 564, 482 (2002).

    Article  ADS  Google Scholar 

  53. R. Sahai, M. Morris, C. Sánchez Contreras, and M. Glaussen, Astron. J. 134, 2200 (2007).

    Article  ADS  Google Scholar 

  54. C. Sánchez Contreras, R. Sahai, A. Gil de Paz, and R. Goodrich, Astrophys. J. Suppl. Ser. 179, 166 (2008).

    Article  ADS  Google Scholar 

  55. D. D. Sasselov, Astrophys. Space Sci. 102, 161 (1984).

    Article  ADS  Google Scholar 

  56. N. Siódmiak, M. Meixner, T. Ueta, et al., Astrophys. J. 677, 382 (2008).

    Article  ADS  Google Scholar 

  57. T. Ueta, M. Meixner, and M. Bobrowsky, Astrophys. J. 528, 861 (2000).

    Article  ADS  Google Scholar 

  58. W. E. C. J. van der Veen, N. R. Trams, and L. B. F. M. Waters, Astron. Astrophys. 269, 231 (1993).

    ADS  Google Scholar 

  59. H. van Winckel, Astron. Astrophys. 319, 561 (1997).

    ADS  Google Scholar 

  60. H. van Winckel, C. Waelkens, and L. B. F. M. Waters, Astron. Astrophys. 306, L37 (1996).

    ADS  Google Scholar 

  61. M. V. Yushkin and V. G. Klochkova, Preprint Spets. Astrofiz. Observ. No. 206 (SAO RAN, Zelenchuk, 2005).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, Karachai-Cherkessian Republic, 369167, Russia

    V. G. Klochkova

Authors
  1. V. G. Klochkova
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to V. G. Klochkova.

Additional information

Original Russian Text © V.G. Klochkova, 2013, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2013, Vol. 39, No. 11, pp. 849–860.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Klochkova, V.G. High-latitude supergiant V5112 Sgr: Enrichment of the envelope with heavy s-process metals. Astron. Lett. 39, 765–775 (2013). https://doi.org/10.1134/S1063773713110054

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S1063773713110054

Keywords

Search

Navigation