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

Autor: Boggs SE; Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA. boggs@berkeley.edu., Harrison FA; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Miyasaka H; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Grefenstette BW; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Zoglauer A; Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA., Fryer CL; CCS-2, Los Alamos National Laboratory, Los Alamos, NM 87545, USA., Reynolds SP; Physics Department, NC State University, Raleigh, NC 27695, USA., Alexander DM; Department of Physics, Durham University, Durham DH1 3LE, UK., An H; Department of Physics, McGill University, Rutherford Physics Building, Montreal, Quebec H3A 2T8, Canada., Barret D; Université de Toulouse, UPS-OMP, IRAP, Toulouse, France. CNRS, Institut de Recherche en Astrophysique et Planétologie, 9 Av. colonel Roche, BP 44346, F-31028 Toulouse Cedex 4, France., Christensen FE; DTU Space, National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby, Denmark., Craig WW; Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA. Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Forster K; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Giommi P; Agenzia Spaziale Italiana (ASI) Science Data Center, Via del Politecnico snc I-00133, Roma, Italy., Hailey CJ; Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA., Hornstrup A; DTU Space, National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby, Denmark., Kitaguchi T; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan., Koglin JE; Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA., Madsen KK; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Mao PH; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Mori K; Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA., Perri M; Agenzia Spaziale Italiana (ASI) Science Data Center, Via del Politecnico snc I-00133, Roma, Italy. INAF - Osservatorio Astronomico di Roma, via di Frascati 33, I-00040 Monteporzio, Italy., Pivovaroff MJ; Lawrence Livermore National Laboratory, Livermore, CA 94550, USA., Puccetti S; Agenzia Spaziale Italiana (ASI) Science Data Center, Via del Politecnico snc I-00133, Roma, Italy. INAF - Osservatorio Astronomico di Roma, via di Frascati 33, I-00040 Monteporzio, Italy., Rana V; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA., Stern D; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA., Westergaard NJ; DTU Space, National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby, Denmark., Zhang WW; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2015 May 08; Vol. 348 (6235), pp. 670-1.
DOI: 10.1126/science.aaa2259
Abstrakt: 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.
(Copyright © 2015, American Association for the Advancement of Science.)
Databáze: MEDLINE
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