Meriem Behiri (SISSA)

Abstract: In this presentation, we explore the advantages of integrating data from the radio to the far-infrared (FIR) spectrum for characterizing dusty star-forming galaxies (DS-FGs). These galaxies are believed to be the star-forming progenitors of local massive quiescent galaxies and are pivotal in reconstructing the cosmic star formation rate density up to high redshifts (Talia+21,Enia+22,Behiri+23). Due to their heavily obscured nature by dust, DSFGs are often invisible in near-infrared/optical/UV bands, necessitating observations at longer wavelengths, primarily in the FIR band where dust emission occurs, and in the radio band, unaffected by dust absorption. By combining data from these spectral regions, even the most dust-obscured objects can be characterized, providing insights into their age, dust temperature, and star-formation activity, and enabling differentiation between various galaxy populations evolving throughout cosmic history (Behiri+24). In this context, we introduce the Serendipitous H-ATLAS fields Observations of Radio Extragalactic Sources (SHORES) survey. SHORES is a newly conducted survey at 2.1 GHz performed with the Australia Telescope Compact Array, comprising 27 shallow fields and 2 deep fields centered around a candidate lensed galaxy. These fields are complemented by Herschel observations (H-ATLAS sgp) and data from various surveys (KIDS, VIKING, Euclid, DES, eRosita..), as well as SKAO pathfinders surveys (e.g., RACS). The extensive 200+ hours of observations with the ATCA interferometer have enabled us to achieve a 33 uJy rms for the shallow fields and 5 uJy rms for the deep fields, resulting in a collection of more than 3200 sources. To fully characterize the radio spectra, the SHORES deep field is observed at 5.5, 9, and 20 GHz, providing crucial insights into various radio populations, including Active Galactic Nuclei (AGN) and Star-Forming Galaxies (SFGs) (Behiri+, in prep.). Additionally, all SHORES observations incorporate polarization measurements, offering a unique opportunity to explore the polarization nature across a substantial sample of AGN and SFGs (Galluzzi+, in prep.). This comprehensive, panchromatic approach provides a crucial perspective for unraveling the mysteries of the radio sky. The broad multi-wavelength coverage of the SHORES survey positions it as an ideal candidate for studying the diverse array of objects in the radio zoo, thereby preparing us for forthcoming SKAO observations.