Reference : Evolution of the polarization of the optical afterglow of the γ-ray burst GRB030329
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/107610
Evolution of the polarization of the optical afterglow of the γ-ray burst GRB030329
English
Greiner, Jochen [Thüringer Landessternwarte Tautenburg, 07778 Tautenburg, Germany]
Klose, Sylvio [Universitäts-Sternwarte Göttingen, D-37083 Göttingen, Germany]
Reinsch, Klaus [Institut für Astronomie, ETH Zürich, 8092 Zürich, Switzerland]
Martin Schmid, Hans [California Institute of Technology, Theoretical Astrophysics 130-33, Pasadena, California 91125, USA]
Sari, Re'em [Clemson University, Department of Physics and Astronomy, Clemson, South Carolina 29634, USA]
Hartmann, Dieter H [NSSTC, SD-50, 320 Sparkman Drive, Huntsville, Alabama 35805, USA]
Kouveliotou, Chryssa [Max-Planck-Institut für extraterrestrische Physik, Garching bei München, Germany]
Rau, Arne [Istituto di Astrofisica Spaziale e Fisica Cosmica, CNR, Sezione di Bologna, 40129 Bologna, Italy]
Palazzi, Eliana [Physikalisches Institut, Universität Köln, 50937 Köln, Germany]
Straubmeier, Christian [Thüringer Landessternwarte Tautenburg, 07778 Tautenburg, Germany]
Stecklum, Bringfried [Instituto de Astronomia, UNAM, 22860 Ensenada, Mexico]
Zharikov, Sergej [Instituto de Astronomia, UNAM, 22860 Ensenada, Mexico]
Tovmassian, Gaghik [Wendelstein-Observatorium, Universitätssternwarte, 81679 München, Germany]
Bärnbantner, Otto [Wendelstein-Observatorium, Universitätssternwarte, 81679 München, Germany]
Ries, Christoph [European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19, Chile]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Henden, Arne [Nordic Optical Telescope, 38700 Santa Cruz de La Palma, Spain]
Kaas, Anlaug A [University of Oslo, Institute for Theoretical Astrophysics, 0315 Oslo, Norway, and Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA]
Grav, Tommy [Astronomical Observatory, NBIfAFG, University of Copenhagen, 2100 Copenhagen Ø, Denmark]
Hjorth, Jens [Astronomical Observatory, NBIfAFG, University of Copenhagen, 2100 Copenhagen Ø, Denmark]
Pedersen, Holger [Astronomical Institute Anton Pannekoek, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands]
Wijers, Ralph A M J [European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19, Chile]
Kaufer, Andreas [Lawrence Livermore National Laboratory, University of California, PO Box 808, Livermore, California 94551, USA]
Park, Hye*-Sook [MMT Observatory, University of Arizona, Tucson, Arizona 85721, USA]
Williams, Grant [Theoretische Weltraum- und Astrophysik, Ruhr-Universität Bochum, 44780 Bochum, Germany]
Reimer, Olaf [> > > >]
1-Nov-2003
Nature
Nature Publishing Group
426
157-159
Yes (verified by ORBi)
International
0028-0836
1476-4687
Basingstoke
United Kingdom
[en] The association of a supernova with GRB030329 strongly supports the `collapsar' model of γ-ray bursts, where a relativistic jet forms after the progenitor star collapses. Such jets cannot be spatially resolved because γ-ray bursts lie at cosmological distances; their existence is instead inferred from `breaks' in the light curves of the afterglows, and from the theoretical desire to reduce the estimated total energy of the burst by proposing that most of it comes out in narrow beams. Temporal evolution of the polarization of the afterglows may provide independent evidence for the jet structure of the relativistic outflow. Small-level polarization (~1-3 per cent) has been reported for a few bursts, but its temporal evolution has yet to be established. Here we report polarimetric observations of the afterglow of GRB030329. We establish the polarization light curve, detect sustained polarization at the per cent level, and find significant variability. The data imply that the afterglow magnetic field has a small coherence length and is mostly random, probably generated by turbulence, in contrast with the picture arising from the high polarization detected in the prompt γ-rays from GRB021206 (ref. 18).
Researchers
http://hdl.handle.net/2268/107610
10.1038/nature02077
http://adsabs.harvard.edu/abs/2003Natur.426..157G
http://de.arxiv.org/abs/astro-ph/0311282

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