Simultaneous radio and optical polarimetry of GRB 191221B afterglow
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90259%2F23%3A00583711" target="_blank" >RIV/67985815:90259/23:00583711 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s41550-022-01832-7" target="_blank" >https://doi.org/10.1038/s41550-022-01832-7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41550-022-01832-7" target="_blank" >10.1038/s41550-022-01832-7</a>
Alternative languages
Result language
angličtina
Original language name
Simultaneous radio and optical polarimetry of GRB 191221B afterglow
Original language description
Gamma-ray bursts (GRBs) are the most luminous transients in the universe and are utilized as probes of early stars, gravitational wave counterparts and collisionless shock physics. In spite of studies on polarimetry of GRBs in individual wavelengths that characterized intriguing properties of prompt emission and afterglow, no coordinated multi-wavelength measurements have yet been performed. Here we report the first coordinated simultaneous polarimetry in the optical and radio bands for the afterglow associated with the typical long GRB 191221B. Our observations successfully caught the radio emission, which is not affected by synchrotron self-absorption, and show that the emission is depolarized in the radio band compared with the optical one. Our simultaneous polarization angle measurement and temporal polarization monitoring indicate the existence of cool electrons that increase the estimate of jet kinetic energy by a factor of more than 4 for this GRB afterglow. Further coordinated multi-wavelength polarimetric campaigns would improve our understanding of the total jet energies and magnetic field configurations in the emission regions of various types of GRBs, which are required to comprehend the mass scales of their progenitor systems and the physics of collisionless shocks.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
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Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Astronomy
ISSN
2397-3366
e-ISSN
2397-3366
Volume of the periodical
7
Issue of the periodical within the volume
January
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
80-87
UT code for WoS article
000932193700001
EID of the result in the Scopus database
2-s2.0-85143767315