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INTEGRAL:INTEGRAL finds titanium in supernova remnant 1987A

17 Oct 2012, 11:54 UTC
INTEGRAL:INTEGRAL finds titanium in supernova remnant 1987A

Astronomers using INTEGRAL have detected the first direct signature of titanium-44 in the remnant of the nearby supernova 1987A. The discovery reveals a large amount of this key isotope in the remnant, equivalent to 0.03 per cent the mass of the Sun. This value is close to upper bounds from theoretical predictions and exceeds the amount of titanium-44 observed in Cassiopeia A - the only other supernova remnant where this isotope has been found. The amount of titanium-44 found in SNR 1987A demonstrates that its radioactive decay has been powering the source for the past 22 years.

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