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grb absorption spectroscopy - Inaf

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GRB 050730<br />

Second component: UV pumping scenario favoured<br />

G/G0 = 105 ÷ 106 where G0 = 1.6 X 10-3 erg cm-2 s-1 .<br />

Third component: possibly electron-ion collisions at work<br />

From C II fine<br />

structure doublet:<br />

10 3 < T< 10 4 K<br />

10 < n e < 60 cm -3

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