A two-week IXPE monitoring campaign on Mrk 421
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00637426" target="_blank" >RIV/67985815:_____/25:00637426 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0368287" target="_blank" >https://hdl.handle.net/11104/0368287</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/adce6b" target="_blank" >10.3847/1538-4357/adce6b</a>
Alternative languages
Result language
angličtina
Original language name
A two-week IXPE monitoring campaign on Mrk 421
Original language description
X-ray polarization is a unique new probe of the particle acceleration in astrophysical jets made possible through the Imaging X-ray Polarimetry Explorer. Here we report on the first dense X-ray polarization monitoring campaign on the blazar Mrk 421. Our observations were accompanied by an even denser radio and optical polarization campaign. We find significant short-timescale variability in both X-ray polarization degree and angle, including an ∼90° angle rotation about the jet axis. We attribute this to random variations of the magnetic field, consistent with the presence of turbulence but also unlikely to be explained by turbulence alone. At the same time, the degree of lower-energy polarization is significantly lower and shows no more than mild variability. Our campaign provides further evidence for a scenario in which energy-stratified shock-acceleration of relativistic electrons, combined with a turbulent magnetic field, is responsible for optical to X-ray synchrotron emission in blazar jets.
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
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
1538-4357
Volume of the periodical
986
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
20
Pages from-to
230
UT code for WoS article
001512780700001
EID of the result in the Scopus database
2-s2.0-105009425844