Astronomy Reports

, Volume 61, Issue 4, pp 342–346 | Cite as

The influence of variations of the elemental composition on the thermal properties of gas behind shock fronts

Article

Abstract

The homogenization of inhomogeneities in the elemental composition of the interstellar medium due to stellar evolution and weak mixing are inevitably related to the action of shocks. This paper considers the influence of variations in the elemental composition on the thermal and ionizational evolution of a collisional gas with the solar metallicity that is cooled behind a shock front with a velocity of 50–120 km/s. The intensities of lines of heavy elements in plasma cooling behind a shock front depend not only on variations in the elemental composition, but also on the shock velocity, due to the different values of the critical density for the transition to the equilibrium level populations in atoms and ions of heavy elements. This circumstance can be used to determine the elemental composition of cool and warm gas of the interstellar medium, as well as the thermal history of the gas.

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References

  1. 1.
    M. A. de Avillez and M.-M. Mac Low, Astrophys. J. 581, 1047 (2002).ADSCrossRefGoogle Scholar
  2. 2.
    E. A. Karitskaya, N. G. Bochkarev, V. V. Shimansky, and G. A. Galazutdinov, ASP Conf. Ser. 445, 335 (2011).ADSGoogle Scholar
  3. 3.
    N. G. Bochkarev, E. A. Karitskaya, V. V. Shimansky, and G. A. Galazutdinov, Astron. Nachr. 334, 835 (2013).ADSCrossRefGoogle Scholar
  4. 4.
    D. Kunth and W. L. W. Sargent, Astrophys. J. 300, 496 (1986).ADSCrossRefGoogle Scholar
  5. 5.
    B. Edvardsson, J. Andersen, B. Gustafsson, D. L. Lambert, P. E. Nissen, and J. Tomkin, Astron. Astrophys. 275, 101 (1993).ADSGoogle Scholar
  6. 6.
    R. E. Luck, V. V. Kovtyukh, and S. M. Andrievsky, Astrophys. J. 132, 902 (2006).ADSGoogle Scholar
  7. 7.
    E. O. Vasiliev and Yu. A. Shchekinov, Astron. Rep. 60, 924 (2016).ADSCrossRefGoogle Scholar
  8. 8.
    A. Ferrara, M. Pettini, and Yu. A. Shchekinov, Mon. Not. R. Astron. Soc. 319, 539 (2000).ADSCrossRefGoogle Scholar
  9. 9.
    S. Yu. Dedikov and Yu. A. Shchekinov, Astron. Rep. 48, 9 (2004).ADSCrossRefGoogle Scholar
  10. 10.
    S. Yu. Dedikov, Yu. A. Shchekinov, and E. O. Vasiliev, Odessa Astron. Publ. 21, 29 (2008).ADSGoogle Scholar
  11. 11.
    E. O. Vasiliev, S. Yu. Dedikov, and Yu. A. Shchekinov, Astrophys. Bull. 64, 317 (2009).ADSCrossRefGoogle Scholar
  12. 12.
    B. G. Elmegreen and J. Scalo, Ann. Rev. Astron. Astrophys. 42, 211 (2004).ADSCrossRefGoogle Scholar
  13. 13.
    M. G. Allen, B. A. Groves, M. A. Dopita, R. S. Sutherland, and L. J. Kewley, Astrophys. J. Suppl. Ser. 178, 20 (2008).ADSCrossRefGoogle Scholar
  14. 14.
    G. J. Ferland, K. T. Korista, D. A. Verner, J. W. Ferguson, J. B. Kingdon, and E. M. Verner, Publ. Astron. Soc. Pacif. 110, 761 (1998).ADSCrossRefGoogle Scholar
  15. 15.
    E. O. Vasiliev, Mon. Not. R. Astron. Soc. 414, 3145 (2011).ADSCrossRefGoogle Scholar
  16. 16.
    E. O. Vasiliev, Mon. Not. R. Astron. Soc. 431, 638 (2013).ADSCrossRefGoogle Scholar
  17. 17.
    M. Asplund, N. Grevesse, and A. J. Sauval, in Proceedings of the 336th ASP Conference on Cosmic Abundances as Records of Stellar Evolution and Nucleosynthesis, Ed. by T. G. Barnes III and F. N. Bash, ASP Conf. Ser. 336, 25 (2005).ADSGoogle Scholar
  18. 18.
    J. J. Drake and P. Testa, Nature 436, 525 (2005).ADSCrossRefGoogle Scholar
  19. 19.
    Yu. I. Izotov and T. X. Thuan, Astrophys. J. 500, 188 (1998).ADSCrossRefGoogle Scholar
  20. 20.
    E. O. Vasiliev, S. K. Sethi, and B. B. Nath, Astrophys. J. 719, 1343 (2010).ADSCrossRefGoogle Scholar
  21. 21.
    E. O. Vasiliev, Mon. Not._R. Astron. Soc. 419, 3641 (2012).ADSCrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Southern Federal UniversityRostov-on-DonRussia
  2. 2.Special Astrophysical ObservatoryRussian Academy of Sciences, Nizhnii ArkhyzKarachaevo-Cherkesskaya RepublicRussia
  3. 3.Astro Space Center, Lebedev Physical InstituteRussian Academy of SciencesMoscowRussia

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