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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
Editorial: Oxford University Press
Año de publicación: 2021
Nº de páginas: 15
Tipo de publicación: Artículo de Revista
Url de la publicación: https://doi.org/10.1093/mnras/stab400
PERROTT, YVETTE C.
GÉNOVA-SANTOS, RICARDO T.
RUBIÑO MARTÍN, JOSE ALBERTO
DIEGO HERRANZ MUÑOZ
LASENBY, ANTHONY N.
LÓPEZ CARABALLO, CARLOS H.