Speaker
Description
An open question in extragalactic astronomy is the extent to which Active Galactic Nuclei (AGN) affect the evolution of their host galaxies. Host galaxy properties of AGN, such as Star Formation Rate and Stellar Mass, are key parameters for studying the role of AGN in galaxy evolution.
However, disentangling the emission of AGN and star-forming components is a challenging task that requires comparing advanced Spectral Energy Distribution (SED) models. Broadband SED modelling offers a less biased technique as we can combine the information from different wavelengths, taking into account e.g. the UV emission from recent star formation of young O and B stars or the intrinsic X-ray emission from the AGN, missed when only IR bands are considered. However, broadband SED models require a combination of space-based and ground-based images, with a variety of angular resolutions, pixel scales and sensitivities, adding more uncertainty to the modeled products. We present a dedicated study to homogeneously measure the fluxes of ~1000 nearby hard X-ray-selected AGN from the BAT AGN Spectroscopic Survey across different wavelengths to precisely measure their host galaxy properties.
The AGN sample covers a large range in bolometric luminosity, black hole mass, Eddington ratio, and obscuration. Consequently, this study allows us to conduct an unbiased statistical analysis of AGN host galaxy properties, and can be applied to larger samples from the eROSITA/All-Sky Survey.
