Submillimeter polarization and variability of quasar PKS1830-211
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00539800" target="_blank" >RIV/67985815:_____/19:00539800 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/0004-6361/201834036" target="_blank" >https://doi.org/10.1051/0004-6361/201834036</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201834036" target="_blank" >10.1051/0004-6361/201834036</a>
Alternative languages
Result language
angličtina
Original language name
Submillimeter polarization and variability of quasar PKS1830-211
Original language description
We report the detection of a clear polarization signal from ALMA observations of the gravitationally lensed quasar PKS 1830-211 at submillimeter wavelengths (Band 9, 650 GHz). Applying a differential-polarimetry technique to the two compact lensed images of the quasar, we estimate a fractional polarization of similar to 5% for one lensed image, while the other appears nearly unpolarized, which implies that the polarization activity varies on a timescale of a few weeks. With additional ALMA Band 7 and 8 (between 300-500 GHz) concomitant data, we constrain a Faraday rotation of a few 105 rad m(-2). We also observe flux-density variability of less than or similar to 10% within one hour in Band 9. This work illustrates that a differential analysis can extract high-accuracy information (flux-density ratio and polarimetry) free of calibration issues from resolved sources in the submillimeter domain.
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
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
1432-0746
e-ISSN
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Volume of the periodical
621
Issue of the periodical within the volume
January
Country of publishing house
FR - FRANCE
Number of pages
7
Pages from-to
A18
UT code for WoS article
000454400600002
EID of the result in the Scopus database
2-s2.0-85059482795