Understanding what drives the observed correlation between total infrared and GHz-radio emission in galaxies ("infrared-radio correlation", IRRC) is a major quest in extra-galactic astronomy, in order to calibrate radio emission as a star formation rate (SFR) indicator. We have recently calibrated the IRRC in the COSMOS field by exploiting deep VLA and MeerKAT continuum surveys, combined with...
In preparation for the deep and wide continuum extra-galactic surveys that will be carried out by the SKA, we have exploited LOFAR deep observations of the Lockman Hole field at 150MHz to investigate the relation between the radio luminosity of star-forming galaxies (SFGs) and their star formation rates (SFRs), as well as its dependence on stellar mass and redshift. The adopted source...
We present the results of a VLA pilot program to measure the radio slope in a sample of z=2 starforming galaxies from the COSMOS field. From the radio slope we will infer the relative fraction of thermal and non-thermal emission from young stellar populations, which can be directly related to the upper mass limit of the IMF. We probe the different galaxy evolutionary phases by selecting 20...
I present the results obtained from the first set (about 70 hours) of LOFAR HBA observations of the Euclid Deep Field North (EDFN). EDFN is becoming the highest priority deep field for LOFAR and has been awarded further 320 hours of observations that will be carried out in the next semesters. This first set of observations has been reduced and analyzed in Italy by the LOFAR-IT...
We are collecting deep multi-wavelength data on the field hosting the QSO J1030+0524 at z=6.3. This includes two of the deepest Chandra and JVLA (1.5 GHz) surveys to date. I will present the X-ray/radio properties of a large-scale structure at z=1.7 assembling around a powerful FRII, that dominates the center of the field. Extended X-ray emission has been detected around the FRII. Remarkably,...
We present the first results of a recently started project focused on radio-loud (RL) Active Galactic Nuclei (AGNs) at high redshift which exploits the new Rapid ASKAP Continuum Survey (RACS). Thanks to its unprecedented combination of area and sensitivity, this survey is the perfect starting point to push the study of RL AGNs at the highest redshift currently explored (z>6), allowing for the...
Giant radio galaxies (GRG) are one of the most spectacular manifestation of astrophysical jets, showing plasma ejecta with an extension up to Mpc. However, the conditions allowing such a growth are still unclear, and may be linked to a particularly favourable environment, to peculiar accretion/ejection conditions allowing a very long and continuous radio activity, or to more than one radio...
3C295 is a bright, compact steep spectrum source with a well-studied integrated radio spectral energy distribution (SED) from 132 MHz to 15 GHz.
However, spatially resolved spectral studies have been limited due to a lack of high resolution images at low radio frequencies.
These frequencies are crucial for measuring absorption processes, and anchoring the overall spectral modelling of the...
Synchrotron emission (SE) is one of the most important diagnostic tools of the physical state of AGNs relativistic jets, mostly because of its ubiquitous presence. However, modelling SE from jets is not free of ambiguities: different models often can provide equally good spectral fits in the observed ranges. In this work we start from a series of high-resolution AMR numerical models of...
