The physical processes that couple the growth of supermassive black holes (SMBH) to their host galaxies - referred to as feedback processes - are now essential components of galaxy evolution models. These processes not only regulate the growth of galaxies but also influence their environment. Observations of radio jets extending to hundred thousand of kiloparsecs, their interaction with ambient gas producing X-ray, optical and infrared emission, relic X-ray cavities observed in galaxy clusters, and outflows observed in neutral, ionized and molecular gas are all manifestations of these feedback phenomena. The interplay between the star formation in galaxies and these phenomena requires close collaboration between galaxy evolution specialists and researchers studying the effect of active galactic nuclei (AGNs) on their host galaxies and vice versa. Furthermore, a coordinated multi-wavelength observational and combined theoretical effort is key to advancing in this field.
The primary goal of Commission X1 is promoting the development of research on SMBHs, AGNs and star formation feedback, as well as their role in galaxy evolution, by fostering interaction between theorists and observers from across the electromagnetic spectrum.
To reach this goal, Commission X1 propose the development and support of the following activities:
• Propose and organize meetings, especially IAU Symposia;
• Plan and coordinate sessions at IAU General Assemblies;
• Serve as a forum for discussions about the best observational campaigns, including discussion of particular objects or classes of objects to be observed, along with necessary multi-wavelength surveys ;
• Serve as a forum of discussion about theory and simulations, supporting the dissemination of computing codes;
• Prepare a quarterly newsletter to announce meeting deadlines, key science advances, opportunities for collaboration, observing proposal deadlines.
As the relevant observations include phenomena at high energy and cover topics in galaxy evolution and cosmology, Commission X1 is relevant to both Division D (High Energy Phenomena and Fundamental Physics) and Division J (Galaxies and Cosmology). The commission intersects with several fields, such as the high-redshift Universe, which is central to Division J, and mechanisms of AGN, which are central to Division D. The scientific program — including modeling SMBHs and galaxy evolution, combined with understanding the effects of AGN on star formation and the energy balance of the interstellar medium (e.g., hot, a few million degrees in early-type galaxies and cool in late-type galaxies) — requires equal participation, access to expertise, and coordination by both Divisions. The astronomers with the expertise to organize the intended discussion forums and symposia do not reside solely in one IAU Division but are members of either IAU Division D or J. Thus, it is appropriate for the proposed commission to be equally represented ex officio on the Steering Committees of each Parent Division, with no "Primary" Division.
Visit the official webpages for the divisions to learn more:
Division D (High Energy Phenomena and Fundamental Physics)
Division J (Galaxies and Cosmology)