Statistical properties of GRB polarization

Kenji Toma, Takanori Sakamoto, Joanne E. Hill, Bing Zhang, Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In spite of extensive efforts of the spectral and lightcurve observations, the emission mechanism of γ-ray bursts (GRBs) is still unclear. Recently the observational techniques of X-ray and γ-ray polarizations have been developed rapidly, and several satellites with high sensitivity for such high energy polarizations have been planned. They will provide us the first definitive detections of GRB polarizations and enable us to discuss their statistical properties. We calculate the distribution of GRB polarizations in the synchrotron models (with globally ordered magnetic field and with small-scale random magnetic field) and Compton drag model. The results show that the distribution of the polarization degrees of ∼100 bursts detected by a realistic polarimeter satellite, such as POET, may distinguish the three models, and provide direct diagnostics of the emission mechanism, the magnetic field configuration, and the geometry of GRB outflows.

Original languageEnglish
Title of host publication2008 Nanjing Gamma-Ray Burst Conference
Pages195-200
Number of pages6
DOIs
Publication statusPublished - 2008 Dec 1
Externally publishedYes
Event2008 Nanjing Gamma-Ray Burst Conference - Nanjing, China
Duration: 2008 Jun 232008 Jun 27

Publication series

NameAIP Conference Proceedings
Volume1065
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2008 Nanjing Gamma-Ray Burst Conference
CountryChina
CityNanjing
Period08/6/2308/6/27

Keywords

  • Polarization
  • Radiation mechanisms
  • γ-ray bursts
  • γ-ray sources

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Toma, K., Sakamoto, T., Hill, J. E., Zhang, B., Yamazaki, R., Ioka, K., & Nakamura, T. (2008). Statistical properties of GRB polarization. In 2008 Nanjing Gamma-Ray Burst Conference (pp. 195-200). (AIP Conference Proceedings; Vol. 1065). https://doi.org/10.1063/1.3027910