Hostname: page-component-76fb5796d-zzh7m Total loading time: 0 Render date: 2024-04-27T13:34:46.860Z Has data issue: false hasContentIssue false
  • English
  • Français

Metal Abundances and Kinematics of Ly-α Absorbers

Published online by Cambridge University Press:  26 May 2016

Sergei A. Levshakov
Sergei A. Levshakov*
Affiliation:
Department of Theoretical Astrophysics, Ioffe Physico- Technical Institute, Politekhnicheskaya Str. 26, 194051 St. Petersburg, Russia

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Both high resolution spectra of QSOs observed at the 8-10 m telescopes and advanced methods of data analysis are crucial for accurate measurements of the chemical composition and physical parameters of the intervening clouds. An overview of our recent results obtained with the Monte Carlo inversion (MCI) procedure is presented. This includes: (1) variations of the shape of the local background ionizing continuum in the 1-5 Ryd range at redshift z ~ 2.8 – 3.0; (2) an inverse correlation between the measured metallicity, [C/H], and the absorber line-of-sight linear size, L; (3) a functional dependence between the line-of-sight velocity dispersion, σv, and L.

Type
Part 2. Origin
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 234 - 239
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Chen, H.-W., Lanzetta, K. M., & Webb, J. K. 2001, ApJ, 556, 158.CrossRefGoogle Scholar
Ferland, G. J. 1997, A Brief Introduction to Cloudy (Internal Rep., Lexington: Univ. Kentucky)Google Scholar
Haardt, F., & Madau, P. 1996, ApJ, 461, 20 [HM].Google Scholar
Holweger, H. 2001, in Solar and Galactic Composition, ed. Wimmer-Schweingruber, R. F., AIP Conf. Proceed. 598, 23.CrossRefGoogle Scholar
Levshakov, S. A., Agafonova, I. I., & Kegel, W. H. 2000, A&A, 360, 833 [LAK].Google Scholar
Levshakov, S. A., Agafonova, I. I., Centurión, M., & Mazets, I. E. 2002, A&A, 383, 813.Google Scholar
Levshakov, S. A., Agafonova, I. I., Centurión, M., & Molaro, P. 2003a, A&A, 397, 851.Google Scholar
Levshakov, S. A., Agafonova, I. I., D'Odorico, S., Wolfe, A. M., & Dessauges-Zavadsky, M. 2003b, ApJ, 582, 596.Google Scholar
Levshakov, S. A., Agafonova, I. I., Reimers, D., & Baade, R. 2003c, A&A, 404, 449.Google Scholar
Levshakov, S. A., Agafonova, I. I., Molaro, P., Centurión, M., & Tytler, D. 2003d, A&A, submitted.Google Scholar
Levshakov, S. A., D'Odorico, S., Agafonova, I. I., & Dessauges-Zavadsky, M. 2004, A&A, 413, 827.Google Scholar
Mathews, W. G., & Ferland, G. J. 1987, ApJ, 323, 456.Google Scholar
Reimers, D., Köhler, S., Wisotzki, L., Groote, D., Rodriguez-Pascual, P., & Wamsteker, W. 1997, A&A, 327, 890.Google Scholar
Shull, J. M., Tumlinson, J., Giroux, M. L., Kriss, G. A., & Reimers, D. 2004, ApJ, 600, 570.Google Scholar
Wolfe, A. M., Lanzetta, K. M., Foltz, C. B., & Chaffee, F. H. 1995, ApJ, 454, 698.Google Scholar