Speaker
Description
Active galactic nuclei (AGN) are powered by accretion onto supermassive black holes, making them some of the brightest sources in the Universe. We combine MIGHTEE radio data with WISE mid-infrared and HSC-SSP optical data in the COSMOS and XMM-LSS fields to investigate the radio properties of AGN populations. We found 3,239 and 5,394 radio detected sources in COSMOS and XMM-LSS respectively. Using color selection criteria, we classify the sources into WISE non-AGNs (3553) and WISE-AGNs (5080), in both fields. We further classify them as strong AGNs (587) and obscured AGNs (181), all of them are z<3. We calculate the spectral index and radio luminosity of these selected AGN populations. We find that the spectral index peak around $\sim 0$ indicates a flat radio spectrum, suggesting that the radio emission is dominated by compact nuclear synchrotron sources. This implies a young phase of radio AGN activity. Interestingly, we find 9 strong AGN and 5 obscured AGNs with $L_{1.4,\mathrm{GHz}} > 10^{25},\mathrm{W,Hz^{-1}}$. In this talk, I will discuss the radio properties of AGN populations and highlight our key results.
| Apply for student award at which level: | MSc |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |