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Hard-X-ray emission lines from the decay of ⁴⁴Ti in the remnant of supernova 1987A

Tsygankov, S. S.; Lutovinov, A. A.; Grebenev, S. A. +1 more

It is assumed that the radioactive decay of ⁴⁴Ti powers the infrared, optical and ultraviolet emission of supernova remnants after the complete decay of ⁵⁶Co and ⁵⁷Co (the isotopes that dominated the energy balance during the first three to four years after the explosion) until the beginning of active interaction o…