Presentation 1 : Oral
Gamma-ray Burst Hosts galaxies : a new cosmic window on galaxy evolution
E.Le Floc'h, I.F.Mirabel, P.-A.Duc, D.Sanders, F.Combes, et al.
Present knowledge indicates that most gamma-ray bursts (GRBs) are linked to the
collapse of massive stars. Because gamma-rays are not attenuated by intervening
dust and gas, the selection of the cosmic sites of massive star formation by
this method is less affected by the biases associated with optical-uv surveys
(e.g. UV-dropout technique). We have started spectroscopic observations in
order to characterize the physical properties of GRB hosts and to determine
whether GRBs occur in normal galaxies. The crucial issue would lead, in the
future, to use the GRB occurance rate as a direct measurement of the cosmic
star formation history even in dusty enshrouded regions.
Presentation 2 : Poster
Gamma-ray Burst Hosts galaxies : a new cosmic window on galaxy evolution
E.Le Floc'h, I.F.Mirabel, P.-A.Duc, D.Sanders, F.Combes, et al.
Present knowledge indicates that most gamma-ray bursts (GRBs) are linked to the
collapse of massive stars. Because gamma-rays are not attenuated by intervening
dust and gas, the selection of the cosmic sites of massive star formation by
this method is less affected by the biases associated with optical-uv surveys
(e.g. UV-dropout technique). We have started spectroscopic observations in
order to characterize the physical properties of GRB hosts and to determine
whether GRBs occur in normal galaxies. The crucial issue would lead, in the
future, to use the GRB occurance rate as a direct measurement of the cosmic
star formation history even in dusty enshrouded regions.