| Abstract: |
Supermassive black holes (SMBH) are polyglot citizens of the Universe: across multiple wavelengths, astronomers can observe them igniting as Active Galactic Nuclei (AGN) by matter accretion, and hear the ripples in spacetime, the gravitational waves (GW), they create in collisions. AGN activity is caused either by stochastic gas inflows or by galaxy mergers, the latter fostering the formation of dual AGN. These systems are the progenitors to BH binaries, which eventually merge and release GW. Instrumental challenges have limited the number of detections confirmed so far to a few hundreds. The Euclid survey, with its currently unmatched high-resolution imaging and wide field of view in the VIS filter, is expected to identify dual AGN in a systematic manner. Furthermore, the upcoming Roman survey, with superior high-resolution NIR imaging and spectroscopic capabilities, can significantly improve upon Euclid AGN and dual AGN selection. Another challenge in the identification of dual AGN is obtaining accurate photometric redshifts (photo-z). This is one of the main focuses of the new HSM Medium Band (MB) Survey, consisting in a new imaging systems of 16 filters providing quasi-spectroscopic coverage of the wavelength range between 400 and 1000 nanometers. In this talk, I will discuss how the synergy between Stage IV Surveys and the HSC MB survey will enable us to work with an unprecedented optical to near-infrared dataset to make the first systematic photometric census of dual AGN systems and display the first results of near-infrared selected dual red quasars in the Euclid survey. |
