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Abstract: We observed 51 sources in the Q-U-I JOint TEnerife (QUIJOTE) cosmological fields that were brighter than 1?Jy at 30?GHz in the Planck Point Source Catalogue (version 1), with the Very Large Array at 28?40?GHz, in order to characterize their high-radio-frequency variability and polarization properties. We find a roughly lognormal distribution of polarization fractions with a median of 2 per cent, in agreement with previous studies, and a median rotation measure (RM) of ?1110?rad?m?2 with one outlier up to ?64?000?rad?m?2, which is among the highest RMs measured in quasar cores. We find hints of a correlation between the total intensity ?flux density and median polarization fraction. We find 59 per cent of sources are variable in total intensity, and 100 per cent in polarization at 3? level, with no apparent correlation between total intensity variability and polarization variability. This indicates that it will be difficult to model these sources without simultaneous polarimetric monitoring observations and they will need to be masked for cosmological analysis.
Fuente: Monthly Notices of the Royal Astronomical Society, Vol. 502, Issue 4, April 2021, P. 4779?4793
Publisher: Oxford University Press
Year of publication: 2021
No. of pages: 15
Publication type: Article
DOI: https://doi.org/10.1093/mnras/stab400
ISSN: 0035-8711,1365-2966
Publication Url: https://doi.org/10.1093/mnras/stab400
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PERROTT, YVETTE C.
LÓPEZ-CANIEGO, MARCOS
GÉNOVA-SANTOS, RICARDO T.
RUBIÑO MARTÍN, JOSE ALBERTO
ASHDOWN, MARK
DIEGO HERRANZ MUÑOZ
LÄHTEENMÄKI, ANNE
LASENBY, ANTHONY N.
LÓPEZ CARABALLO, CARLOS H.
POIDEVIN, FRÉDÉRICK
TORNIKOSKI, MERJA
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