Presentation on theme: "Gas in GRB hosts Yuri Shchekinov Southern Federal University Many faces, SAO, Nizhny Arkhyz, Oct 12-15 2009."— Presentation transcript:
Gas in GRB hosts Yuri Shchekinov Southern Federal University Many faces, SAO, Nizhny Arkhyz, Oct 12-15 2009
H2 in GRB hosts No vr excited H2 is seen in any of 5 GRB environment Tumlinson etal 2008 More effective H2 destruction in GRB hosts than in LMC/SMC ? GRB itself photodissociates only its parent molecular cloud ??
What I would like to conclude The ISM in GRB hosts is well-mixed and 2-phase H2 molecules are to form efficiently but are not seen in GRB absorptions because are destroyed collisionally in merging events As (if) metals are well-mixed in galactic ISM mergers have to be frequent (<< Gyr) z-growing peak luminosity in optical post-GRB (Beskin etal, thursday) supports this conclusion
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