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Astronomy Reports

, Volume 51, Issue 1, pp 38–43 | Cite as

Thermal radio emission and absorption in HII regions in the vicinity of remnants of type II supernovae

  • A. V. Pynzar’
  • V. I. Shishov
Article

Abstract

Data on thermal radio emission and absorption in and near the directions towards supernova remnants are used to estimate the distribution of ionized gas surrounding remnants of type II supernovae. The amount of absorption and emission toward the supernova remnants are determined by two types of HII regions. The first are extended HII regions around the supernova remnants (Strömgren spheres), while the second are more compact and bright HII regions surrounding early-type stars. In the early stages of evolution of the supernova remnants (1000–3000 yrs), the amount of thermal absorption and emission is minimum, apparently indicating that only the supernova Strömgren zones contribute in these stages, while there is an absence of absorption or emission from the compact HII regions. Possible mechanisms for this scenario are discussed.

PACS numbers

98.38.Mz 98.38.Hv 95.85.Bh 

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References

  1. 1.
    A. V. Pynzar’ and V. I. Shishov, Astron. Zh. 78, 585 (2001) [Astron. Rep. 45, 502 (2001)].Google Scholar
  2. 2.
    A. V. Pynzar’ and V. I. Shishov, Astron. Zh. 80, 317 (2003) [Astron. Rep. 47, 288 (2003)].Google Scholar
  3. 3.
    R. L. Sorochenko, Astron. Nachr. 310, 389 (1989).ADSGoogle Scholar
  4. 4.
    J. Rho, PhD. Thesis (Univ. of Maryland at College Park, USA, 1995), p. 327.Google Scholar
  5. 5.
    D. K. Milne, in IAU Colloquium no. 101: Supernova Remnants and the Interstellar Medium, Ed. by R. S. Roger and T. L. Landecker (Cambridge Univ. Press, Cambridge, 1988), p. 351.Google Scholar
  6. 6.
    T. A. Lozinskaya, Supernovae and Stellar Wind in the Interstallar Medium (Nauka, Moscow, 1986; American Inst. of Physics, New York, 1992).Google Scholar
  7. 7.
    A. V. Kovalenko, A. V. Pynzar’, and V. A. Udal’tsov, Astron. Zh. 72, 396 (1995) [Astron. Rep. 39, 708 (1995)].Google Scholar
  8. 8.
    N. E. Kassim, Astrophys. J. 347, 915 (1989).CrossRefADSGoogle Scholar
  9. 9.
    G. A. Dulk and O. B. Slee, Aust. J. Phys. 199, 61 (1975).Google Scholar
  10. 10.
    S. A. Trushkin, Bull. Spec. Astrophys. Obs. 46, 62 (1998).ADSGoogle Scholar
  11. 11.
    S. A. Kaplan and S. B. Pikel’ner, The Interstellar Medium (Nauka, Moscow, 1979; Harvard Univ. Press, Cambridge, 1970).Google Scholar
  12. 12.
    F. J. Lockman, Astrophys. J. 209, 429 (1976).CrossRefADSGoogle Scholar
  13. 13.
    L. Hart and A. Pedlar, Mon. Not. R. Astron. Soc. 176, 547 (1976).ADSGoogle Scholar
  14. 14.
    J. C. Cersosimo, I. N. Azcarate, L. Hart, et al., Astron. Astrophys. 208, 239 (1989).ADSGoogle Scholar
  15. 15.
    A. L. Fey, S. R. Spangler, and J. M. Cordes, Astrophys. J. 372, 132 (1991).CrossRefADSGoogle Scholar
  16. 16.
    A. Broadbent, C. G. T. Haslam, and J. L. Osborne, Mon. Not. R. Astron. Soc. 237, 381 (1989)ADSGoogle Scholar
  17. 17.
    L. Spitzer, Jr., Physical Processes in the Interstellar Medium (Wiley, New York, 1978).Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • A. V. Pynzar’
    • 1
  • V. I. Shishov
    • 1
  1. 1.Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Institute of PhysicsRussian Academy of SciencesPushchino, Moscow oblastRussia

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