grb absorption spectroscopy - Inaf
grb absorption spectroscopy - Inaf
grb absorption spectroscopy - Inaf
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CONCLUSIONS<br />
GRBs are a new tool to study the metal enrichment history of the galaxies, up to z > 5.<br />
Medium-to-high resolution, <strong>absorption</strong> <strong>spectroscopy</strong> is necessary to resolve the GRB<br />
environment in components and to separate it from the ISM, and to fully explore the<br />
information carried by the excited transitions.<br />
The ISM of the GRB hosts is complex, with many components contributing to the main<br />
system <strong>absorption</strong>.<br />
Interesting GRB surrounding medium characteristics, such as different properties of<br />
different components, high ionization lines, photoionization/photoexcitation needs<br />
medium-to high resolution in order to be properly addressed.<br />
Fine structure lines are commonly observed in GRB afterglows and are produced by<br />
UV pumping. They can give us constraints on the distance of the absorbing gas from<br />
the GRB. The prompt/afterglow emission affects the ISM up to hundreds of pc<br />
(GRB080330), or even some kpcs (GRB080319B, GRB090926A).<br />
X-shooter is is gathering exciting data on GRBs since more than 3 years.
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