Speaker
Description
Quasars can be classified as red or blue based on their g-i colour. It has been found that the reddest quasars show a significant increase in their radio detection fraction compared to the bluest, and that they appear to be primarily associated with faint, compact radio sources. This makes high-resolution radio observations essential for constraining the physical extent of the radio emission. In this talk I will present on-going work on a sample of 595 SDSS DR16 quasars at z < 2.5 in the ELAIS-N1 field, for which we use recently released deep 144 MHz images. This dataset covers angular resolutions of 6", 1.2", 0.6" and 0.3", providing a unique dataset to study these objects from nuclear to supergalactic scales simultaneously. Its VLBI capabilities make the ILT a great match to other higher-frequency instruments such as e-MERLIN. Furthermore, LOFAR's exquisite sensitivity to faint extended emission allows the detection of large-scale diffuse emission that other surveys such as FIRST or VLASS could have missed. In this talk will present initial results on the projected lengths and radio powers derived by combining these four resolutions and compare it against literature findings.
