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^(44)Ti 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 Forster, K. and Madsen, K. K. and Mao, P. H. and Rana, V. (2015) ^(44)Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion. Science, 348 (6235). pp. 670-671. ISSN 0036-8075. doi:10.1126/science.aaa2259.

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In core-collapse supernovae, titanium-44 (^(44)Ti) 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 ^(44)Ti 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
Related URLs:
URLURL TypeDescription Material
Boggs, S. E.0000-0001-9567-4224
Harrison, F. A.0000-0003-2992-8024
Miyasaka, H.0000-0002-8074-4186
Grefenstette, B. W.0000-0002-1984-2932
Forster, K.0000-0001-5800-5531
Madsen, K. K.0000-0003-1252-4891
Rana, V.0000-0003-1703-8796
Alternate Title:44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion
Additional Information:© 2015 American Association for the Advancement of Science. Received 3 November 2014; accepted 8 April 2015. This work was supported under NASA Contract no. NNG08FD60C and made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software, and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and the California Institute of Technology (USA). D.B. acknowledges funding from the French Space Agency (CNES). T.K. was supported by Japan Society for the Promotion of Science Grant-in-Aid for Young Scientists (B) (no. 24740185). N.J.W. acknowledges funding from the Technical University of Denmark. NuSTAR data are accessible from NASA’s High Energy Astrophysics Science Archive Research Center (HEASARC,
Group:NuSTAR, Space Radiation Laboratory
Funding AgencyGrant Number
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Japan Society for the Promotion of Science (JSPS)24740185
Technical University of DenmarkUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2015-60
Issue or Number:6235
Record Number:CaltechAUTHORS:20150514-152641080
Persistent URL:
Official Citation:44Ti gamma-ray emission lines from SN1987A reveal an asymmetric explosion S. E. Boggs, F. A. Harrison, H. Miyasaka, B. W. Grefenstette, A. Zoglauer, C. L. Fryer, S. P. Reynolds, D. M. Alexander, H. An, D. Barret, F. E. Christensen, W. W. Craig, K. Forster, P. Giommi, C. J. Hailey, A. Hornstrup, T. Kitaguchi, J. E. Koglin, K. K. Madsen, P. H. Mao, K. Mori, M. Perri, M. J. Pivovaroff, S. Puccetti, V. Rana, D. Stern, N. J. Westergaard, and W. W. Zhang Science 8 May 2015: 348 (6235), 670-671. [DOI:10.1126/science.aaa2259]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57542
Deposited By: Tony Diaz
Deposited On:14 May 2015 23:38
Last Modified:10 Nov 2021 21:51

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