SIMBAD references

2008ApJ...683L...9C - Astrophys. J., 683, L9-L12 (2008/August-2)

Outliers from the mainstream: how a massive star can produce a gamma-ray burst.

CAMPANA S., PANAGIA N., LAZZATI D., BEARDMORE A.P., CUSUMANO G., GODET O., CHINCARINI G., COVINO S., DELLA VALLE M., GUIDORZI C., MALESANI D., MORETTI A., PERNA R., ROMANO P. and TAGLIAFERRI G.

Abstract (from CDS):

It is now recognized that long-duration gamma-ray Bursts (GRBs) are linked to the collapse of massive stars, based on the association between (low redshift) GRBs and (Type Ic) core-collapse supernovae (SNe). The census of massive stars and GRBs reveals, however, that not all massive stars produce a GRB. Only ∼1% of core-collapse SNe are able to produce a highly relativistic collimated outflow, and hence a GRB. The extra crucial parameter has long been suspected to be metallicity and/or rotation. We find observational evidence strongly supporting that both ingredients are necessary in order to make a GRB out of a core-collapsing star. A detailed study of the absorption pattern in the X-ray spectrum of GRB 060218 reveals evidence of material highly enriched in low-atomic-number metals ejected before the SN/GRB explosion. We find that, within the current scenarios of stellar evolution, only a progenitor star characterized by a fast stellar rotation and subsolar initial metallicity could produce such a metal enrichment in its close surrounding.

Abstract Copyright:

Journal keyword(s): Gamma Rays: Bursts - Stars: Evolution - stars: individual (GRB 060218)

Simbad objects: 3

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2020.02.25-13:49:30

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