Ward, P. and Meurs, E. J. A. and Fiore, F. and D'Elia, V. and Lazzati, D. and Perna, R. and Sbordone, L. and Stratta, G. and Antonelli, L. A. and Chincarini, G. and Covino, S. and Di Paola, A. and Fontana, A. and Ghisellini, G. and Israel, G. and Frontera, F. and Marconi, G. and Stella, L. and Vietri, M. and Zerbi, F. (2005) A flash in the dark: UVES/VLT high-resolution spectroscopy of GRB afterglows. Il nuovo cimento C, 28 (4\5). pp. 783-786. ISSN 1826-9885
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Abstract
We present the first high-resolution observations of the optical afterglow of a gamma-ray burst. The spectra show that the matter of the host galaxy in the circumburst region is complex, with many components contributing to each system. Also the presence of low- and high-ionisation lines allows rather strong constraints on the gas ionisation parameters of the various components to be derived. These can be interpreted as density fluctuations on top of a regular R−2 wind density profile.
| Item Type: | Article |
|---|---|
| Additional Information: | Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004. |
| Uncontrolled Keywords: | γ-ray sources; γ-ray bursts |
| Subjects: | 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse |
| Depositing User: | Marina Spanti |
| Date Deposited: | 17 Mar 2020 17:51 |
| Last Modified: | 17 Mar 2020 17:51 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/15946 |
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