Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30182
Title: | 44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion | Authors: | 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, Matteo Pivovaroff, M. J. Puccetti, S. Rana, V. Stern, D. Westergaard, N. J. Zhang, W. W. |
Issue Date: | 2015 | Journal: | SCIENCE | Number: | 348 | Issue: | 6235 | First Page: | 670 | Abstract: | In core-collapse supernovae, titanium-44 (Ti-44) 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 Ti-44 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. | URI: | http://hdl.handle.net/20.500.12386/30182 | URL: | https://science.sciencemag.org/content/348/6235/670 | ISSN: | 0036-8075 | DOI: | 10.1126/science.aaa2259 | Bibcode ADS: | 2015Sci...348..670B | Fulltext: | reserved |
Appears in Collections: | 1.01 Articoli in rivista |
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