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Prog. Theor. Phys. Vol. 92 No. 1 (1994) pp. 37-46

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Strömgren Sphere in the Expanding Universe and a Possible Seed of Structure Formation

Humitaka Sato

Department of Physics, Kyoto University, Kyoto 606-01

(Received January 19, 1994)

Abstract:

Formation of the Strömgren sphere by a massive star in the early universe after the recombination is studied. The quasi-stationary Strömgren sphere is formed in the stages of z > 101 ∼2 for typical parameters of the universe model. The electron temperature Te in the HII region is kept equal to the cosmic background radiation temperature Tr by the Compton process. After this epoch, the ionisation front expands continuously and the quasi-stationary Strömgren sphere is not formed. Te can increase above Tr in this later stage. Transition feature is investigated in an analytic manner. In the case of the quasi-stationary Strömgren sphere, the HII region may generate a dense shell by the expansion due to pressure unbalance and a fragmentation of this shell could trigger further structure formation. This process occurs only for the small HII region.


URL : http://ptp.ipap.jp/link?PTP/92/37/
DOI : 10.1143/PTP.92.37

[ Full Text PDF : FREE ACCESS (849K) ] Citation:

References:

  1. J. E. Gunn and B. A. Peterson, Astrophys. J. 142 (1965), 1633.
  2. A. G. Dorshkevich, Ya. B. Zeldovich and I. D. Novikov, Soviet AJ 11 (1967), 233.
  3. T. Matsuda, H. Sato and H. Takeda, Prog. Theor. Phys. 42 (1969), 219[PTP].
  4. H. Sato, T. Matsuda and H. Takeda, Prog. Theor. Phys. Suppl. No. 49 (1971), 11[PTP].
  5. F. Palla, E. E. Salpeter and S. W. Stahler, Astrophys. J. 271 (1983), 632[CrossRef].
  6. M. J. Rees and J. P. Ostriker, Mon. Not. R. Astron. Soc. 179 (1977), 541.
  7. See, e.g., Y. Suto, Prog. Theor. Phys. 90 (1993), 1173[PTP].
  8. L. Spitzer, Jr., Physical Processes in the Interstellar Medium (J. Wiley and Sones, 1978), Chaps. 5 and 12.
  9. H. Sato, Prog. Theor. Phys. 90 (1993), 841[PTP].
  10. S. Ikeuchi, Publ. Astron. Soc. Jpn. 33 (1981), 221.
    J. P. Ostriker and L. L. Cowie, Astrophys. J. 243 (1981), L127[CrossRef].
  11. P. R. Shapiro and M. I. Giroux, Astrophys. J. 321 (1987), L107[CrossRef].
  12. M. Fukugita and M. Kawasaki, Astrophys. J. (1994) (to be published).
  13. S. Sasaki and F. Takahara, Prog. Theor. Phys. 91 (1994), 699[PTP].
  14. W. H. Press and P. L. Schechter, Astrophys. J. 181 (1974), 425.
  15. G. F. Smoot et al., Astrophys. J. 396 (1992), L1[CrossRef].
  16. G. Efstathiou, J. R. Bond and S. D. White, Mon. Not. R. Astron. Soc. 258 (1992), 1.
  17. J. M. Bardeen, J. R. Bond, N. Kaiser and A. S. Szalay, Astrophys. J. 304 (1986), 15[CrossRef].
  18. H. Susa, Master Thesis (1994).

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