Advertisement

Astrophysics and Space Science

, Volume 139, Issue 1, pp 163–174 | Cite as

The clustering of Lα absorption lines in the QSO spectra

  • J. P. Mücket
  • V. Müller
Article

Abstract

For nine published high-resolution QSO spectra a correlation analysis of their Lα forest lines has been performed. The two-point correlation functions show some quasi-periodic structure of magnitude |ξ|≲0.3. Their characteristic separation along the line-of-sight amounts to Δs0=3×10−3 or to Δs0=5×10−3 for Ω=1 and 0.2, respectively. Especially the distribution of nearest neighbouring line positions in two close QSO pairs allows for the interpretation that the absorption clouds lie in sheet-like structures as predicted by the pancake theory. The correlation data contain some hints on metal absorbers within the forest of unidentified lines.

Keywords

Correlation Analysis Correlation Function Absorption Line Correlation Data Line Position 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Atwood, B., Baldwin, J. A., and Carlswell, R. F.: 1985,Astrophys. J. 292, 58.Google Scholar
  2. Bahcall, N. A. and Soneira, R. M.: 1984,Astrophys. J. 277, 27.Google Scholar
  3. Carswell, R. F., Morton, D. C., Smith, M. G., Stockton, A. N., Turnshek, D. A., and Weymann, R. J.: 1984,Astrophys. J. 278, 486.Google Scholar
  4. Carswell, R. F., Whelan, J. A. J., Smith, M. G., Boksenberg, A., and Tytler, D.: 1982,Monthly Notices Roy. Astron. Soc. 198, 91.Google Scholar
  5. Crotts, A. P. S.: 1985,Astrophys. J. 298, 732.Google Scholar
  6. Crotts, A. P. S., Melott, A. L., York, D. G., and Fry, J. N.: 1985,Phys. Letters 155B, 251.Google Scholar
  7. Dekel, A.: 1982,Astrophys. J. 261, L13.Google Scholar
  8. Doroshkevich, A. G.: 1983,Pis'ma Astron. Zh. 9, 515.Google Scholar
  9. Doroshkevich, A. G.: 1984,Astron. Zh. 61, 218.Google Scholar
  10. Doroshkevich, A. G. and Mücket, J. P.: 1985,Pis'ma Astron. Zh. 11, 331 (Soviet Astron. Letters 11, 137).Google Scholar
  11. Doroshkevich, A. G., Kotok, E. V., Shandarin, S. F., and Sigov, Yu. S.: 1983,Monthly Notices Roy. Astron. Soc. 202, 537.Google Scholar
  12. Hunstead, R. W., Murdoch, H. S., Peterson, B. A., Blades, J. C., Jauncey, D. L., Wright, A. E., Pettini, M., and Savage, A.: 1986,Astrophys. J. 305, 496.Google Scholar
  13. Meyer, D. M. and York, D. G.: 1987,Astrophys. J. 315, L5.Google Scholar
  14. Mücket, J. P. and Müller, V.: 1987, ‘Observational Evidence of Activity of Galaxies’, in E. Ye. Khachikian, K. J. Fricke, and J. Melnick (eds.),IAU Symp. 121.Google Scholar
  15. Müller, V., Mücket, J., and Haubold, H. J.: 1987,Astron. Nachr. 308, 177.Google Scholar
  16. Oort, J. H.: 1981,Astron. Astrophys. 94, 359.Google Scholar
  17. Oort, J. H.: 1983,Ann. Rev. Astron. Astrophys. 21, 373.Google Scholar
  18. Oort, J. H.: 1984,Astron. Astrophys. 139, 211.Google Scholar
  19. Peebles, P. J. E.: 1980,The Large-Scale Structure of the Universe, Princeton University Press, Princeton.Google Scholar
  20. Sargent, W. L. W., Young, P. J., Boksenberg, A., and Tytler, D.: 1980,Astrophys. J. Suppl. 42, 41.Google Scholar
  21. Sargent, W. L. W., Young, P. J., and Schneider, D. P.: 1982,Astrophys. J. 256, 374.Google Scholar
  22. Shandarin, S. V., Doroshkevich, A. G., and Zeldovich, Ya. B.: 1983,Usp. Fiz. Nauk 139, 83Google Scholar
  23. Shaver, P. A. and Robertson, J. G.: 1983,Astrophys. J. 268, L57.Google Scholar
  24. Waltz, I. E.: 1985,Astron. Zh. 62, 19.Google Scholar
  25. Webb, J. K. and Carlswell, R. F.: 1987, ‘Observational Cosmology’, in A. Hewish, G. R. Burbidge, and L. Z. Fang (eds.),Proc. IAU Symp. 124.Google Scholar

Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • J. P. Mücket
    • 1
  • V. Müller
    • 1
  1. 1.Zentralinstitut für Astrophysik der Akademie der Wissenschaften der DDRPotsdamG.D.R.

Personalised recommendations