Congratulations to Sia who defended her thesis on Nov, the 27th.

Title: Intensity mapping from 2D to 3D: Evaluating the feasibility of interpreting upcoming data

Abstract: 2D and 3D intensity mapping (IM) is a valuable complement to galaxy surveys for studying galaxy evolution. CONCERTO, a pioneering instrument operating at 120-310 GHz, measured 3D fluctuations of the [CII] line from sources at z>5. In my research, I focused on developing and validating the SIDES-Uchuu simulation, valuable for assessing the feasibility of extracting physical information from intensity maps. My research was specifically directed to : 1) Investigating the reliability of the power spectrum, as a tool, to extract physical information from CONCERTO's intensity maps and other experiments, addressing the impact of field-to-field variance as a significant limitation. 2) Validating the "halo model" used to interpret the power spectrum of cosmic infrared background (CIB) and line intensity mapping. Analyzing SIDES-Uchuu simulated data revealed an inability of analytical models to accuratelly recover the physical quantities embedded in the simulation. 3) Using the developed tools, I explored a previously neglected signal. The cross-correlation power between extragalactic CO-line intensity and CIB fluctuations, serve as an additional foreground to the elusive kSZ signal.

Sia will move to Crete as a Postdoctoral Researcher at the Institute of Computer Science, Foundation for Research and Technology – Hellas (FORTH).