SPLAT! STAR THWACKED, GUTS flung into space at 15 per cent of LIGHTSPEED • The Register

As Paul wrote, two different stars. Preprints are at
http://arxiv.org/abs/1502.01465
http://arxiv.org/abs/1505.07155
and you can easily find the published papers from ADS.

In article ,
dlzc writes:
So, apparently supernovas are NOT the sole source of heavier
elements sprayed into interstellar space...

An interesting thought, but it's not so clear. The neutron stars are
interacting with extended disks above the stellar surfaces, not with
the stellar interiors. There's no reason I see for the disks to have
enhanced heavy element abundances. I haven't seen (and am not
doing!) a calculation, but I'd be surprised if the heavy element
enrichment by this process is more than trivial.

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