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

S. A. Grebenev (), A. A. Lutovinov, S. S. Tsygankov and C. Winkler
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S. A. Grebenev: Space Research Institute, RAS, Profsoyuznaya 84/32, 117997 Moscow, Russia
A. A. Lutovinov: Space Research Institute, RAS, Profsoyuznaya 84/32, 117997 Moscow, Russia
S. S. Tsygankov: Space Research Institute, RAS, Profsoyuznaya 84/32, 117997 Moscow, Russia
C. Winkler: European Space Agency, ESTEC, Keplerlaan 1, 2200 AG Noordwijk, The Netherlands

Nature, 2012, vol. 490, issue 7420, 373-375

Abstract: Observations of hard X-rays from the remnant of supernova 1987A in the narrow band containing two direct-escape lines of 44Ti at 67.9 and 78.4 keV imply that this radiation had sufficient energy to power the remnant at late times; the initial mass of 44Ti is estimated to be near the upper bound of theoretical predictions.

Date: 2012
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DOI: 10.1038/nature11473

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