Speaker
Description
Recent extragalactic surveys with the JWST have uncovered a population of compact, extremely red sources at high redshift called Little Red Dots (LRDs) which are characterised by V-shaped continuum with a vertex at around 4000 Å. Interestingly, studies have shown that their number density decreases towards lower redshifts (<4). Two competing ideas suggest that LRDs may be extremely dusty/obscured BL-AGNs or dusty SFGs. In this talk, I present preliminary results from a study of radio properties of Euclid selected LRD candidates in the three Euclid deep fields (North, South and Fornax), using MeerKAT and LOFAR radio data. The compactness of Euclid-selected LRDs has not been confirmed by JWST. So these sources should be regarded as LRD candidates. Studies in the radio can help determine their true nature and stacking analysis can be used to derive upper limits to their radio luminosities. Finally, I will highlight how SKA, with its unprecedented sensitivity, resolution and wide frequency coverage, is a transformative instrument to study LRDs by enabling the detection of faint radio emissions, thus providing more insight about the physical nature and the temporal evolution of this enigmatic population.
| Topics | Galaxy Evolution & AGN |
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