QUIJOTE scientific results -- IX. Radio sources in the QUIJOTE-MFI wide survey maps

TL;DR

This paper presents a comprehensive catalogue of 786 radio sources from the QUIJOTE Wide Survey, analyzing their intensity and polarization properties across multiple frequencies, and comparing statistical characteristics with existing models.

Contribution

It provides the first extensive catalogue of QUIJOTE radio sources, including polarization data, and compares their properties with models and previous surveys.

Findings

38.7% of sources are near the Galactic plane.

Median polarization fractions range from 2.8% to 4.7%.

Catalogue is consistent with existing models for radio source properties.

Abstract

We present the catalogue of Q-U-I JOint TEnerife (QUIJOTE) Wide Survey radio sources extracted from the maps of the Multi-Frequency Instrument compiled between 2012 and 2018. The catalogue contains 786 sources observed in intensity and polarization, and is divided into two separate sub-catalogues: one containing 47 bright sources previously studied by the \emph{Planck} collaboration and an extended catalogue of 739 sources either selected from the \emph{Planck} Second Catalogue of Compact Sources or found through a blind search carried out with a Mexican Hat 2 wavelet. A significant fraction of the sources in our catalogue (38.7 per cent) are within the $|b| \leq 20^\circ$ region of the Galactic plane. We determine statistical properties for those sources that are likely to be extragalactic. We find that these statistical properties are compatible with currently available models, with a $\sim$1.8 Jy completeness limit at 11 GHz. We provide the polarimetric properties of (38, 33, 31, 23) sources with P detected above the $99.99\%$ significance level at (11, 13, 17, 19) GHz, respectively. Median polarization fractions are in the $2.8$-$4.7$\% range in the 11-19 GHz frequency interval. We do not distinguish between Galactic and extragalactic sources here. The results presented here are consistent with those reported in the literature for flat- and steep-spectrum radio sources.