44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion.
- Boggs, S.E.
- Harrison, F.A.
- Miyasaka, H.
- Grefenstette, B.W.
- Zoglauer, A.
- Fryer, C.L.
- Reynolds, S.P.
- Alexander, D.M.
- An, H.
- Barret, D.
- Christensen, F.E.
- Craig, W.W.
- Forster, K.
- Giommi, P.
- Hailey, C.J.
- Hornstrup, A.
- Kitaguchi, T.
- Koglin, J.E.
- Madsen, K.K.
- Mao, P.H.
- Mori, K.
- Perri, M.
- Pivovaroff, M.J.
- Puccetti, S.
- Rana, V.
- Stern, D.
- Westergaard, N.J.
- Zhang, W.W.
Publication date
May 2015
DOI Publisher
American Association for the Advancement of Science (AAAS) Journal
ScienceAbstract
In core-collapse supernovae, titanium-44 (44Ti) is produced in the innermost ejecta, in the layer of material directly on top of the newly formed compact object. As such, it provides a direct probe of the supernova engine. Observations of supernova 1987A (SN1987A) have resolved the 67.87- and 78.32–kilo–electron volt emission lines from decay of 44Ti produced in the supernova explosion. These lines are narrow and redshifted with a Doppler velocity of ~700 kilometers per second, direct evidence of large-scale asymmetry in the explosion
Add to ORKG