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44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion.

Boggs, S.E. and Harrison, F.A. and Miyasaka, H. and Grefenstette, B.W. and Zoglauer, A. and Fryer, C.L. and Reynolds, S.P. and Alexander, D.M. and An, H. and Barret, D. and Christensen, F.E. and Craig, W.W. and Forster, K. and Giommi, P. and Hailey, C.J. and Hornstrup, A. and Kitaguchi, T. and Koglin, J.E. and Madsen, K.K. and Mao, P.H. and Mori, K. and Perri, M. and Pivovaroff, M.J. and Puccetti, S. and Rana, V. and Stern, D. and Westergaard, N.J. and Zhang, W.W. (2015) '44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion.', Science., 348 (6235). pp. 670-671.

Abstract

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.

Item Type:Article
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1126/science.aaa2259
Date accepted:08 April 2015
Date deposited:No date available
Date of first online publication:May 2015
Date first made open access:No date available

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