Short GRB's: Neutron Star Merger Evidence?

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Short gamma-ray bursts (sGRBs) are strongly suggested to be caused by binary neutron star mergers, supported by several indirect observations. These bursts originate from older stellar populations, often located far from their host galaxies, aligning with the characteristics of neutron star mergers. The duration and energy of sGRBs match theoretical predictions for such systems, and the observed event rates are consistent with expectations, albeit with significant uncertainty. However, definitive proof remains elusive, with the ideal evidence being the simultaneous detection of gravitational waves from an sGRB source. Current discussions highlight the need for more concrete observational data to confirm this hypothesis.
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Is there any actaul observational evidence that short burst GRB's are casued by neutron star mergers?
 
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There are numerous hints, and indirect pieces of evidence, but nothing conclusive. Binary neutron star mergers seem to perfectly match the properties of sGRBs, while no other models are able to---which is an indication in itself. Some of the relevant observations:

sGRBs come from old stellar populations without star formation (e.g. red ellipticals)
They have much larger separations from their host galaxies
The time duration and energy content matches expectations for binary neutron star systems
The observed and expected event rates are consistent (but the expectations have huge error bars)

The conclusive piece of evidence would be coincident detection of gravitationals waves from a sGRB source.
 
Thanks a lot for that , i was trying to find what thhe evidence was but couldn't really find anything cocnrete, much appreciated.
 
Happy to help
 

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