Abstract: We present two mock redshift surveys of the dusty star-forming galaxy population based on N-body simulations that reproduce the observed surface density of galaxies at 0.5 to 2.0mm. The large simulated area (100 sq. deg) allows us to identify gravitationally bound systems, trace their assembly histories, and quantify the redshift evolution of their galaxy content and size. We find a strong evolution in the fractional contribution of different star-forming galaxy populations within cluster progenitors. Luminous infrared galaxies are ∼20–40 per cent of the cluster/protocluster members. Based on these mock catalogs we provide observational predictions for the TolTEC Large-Scale Structure and Ultra-Deep surveys.

Speaker Bio: Dr. Itziar Aretxaga is a Distinguished Researcher at the Centro de Astrobiología (CSIC–INTA), on leave from a Full Professor position at INAOE, Mexico, and a member of The World Academy of Sciences (TWAS), UNESCO’s global academy for the advancement of science in the developing world. She received the 2023 Luis Rivera Terrazas State Medal in Basic Sciences and Humanities in Mexico, and currently holds an ATRAE appointment supporting the integration of consolidated researchers into the Spanish scientific system. Her research focuses on extragalactic astrophysics and cosmology, with particular emphasis on the formation and evolution of galaxies. She is the author of more than 150 refereed publications, with over 9000 citations and an H‑index of 57, and has delivered more than 150 invited talks and colloquia worldwide. Dr. Aretxaga has played leading roles in major millimeter and infrared instrumentation projects, and currently serves as the Project Scientist of TolTEC, the new polarimetric camera of the 50‑m Large Millimeter Telescope Alfonso Serrano in Mexico. Since 2016, Dr. Aretxaga has been part of the leadership team of the International School for Young Astronomers (ISYA) of the International Astronomical Union, serving as its Director since 2018.