Raul Monsalve (Boulder / ASU): Current Developments and Constraints of Redshifted 21-cm Models by EDGES

Seminar | July 17 | 1:10-2 p.m. | 501B Campbell Hall

 Raul Monsalve, Arizona State University

 Radio Astronomy Lab

The Experiment to Detect the Global EoR Signature (EDGES) aims to detect the sky-average 21-cm signal from neutral hydrogen in the intergalactic medium (IGM) at redshifts 27 > z > 6. This is the period when the first stars, galaxies, and black holes formed and reionized the IGM, and it is accessed through radio measurements in the range 50-200 MHz. Since 2015, EDGES has deployed three instruments at the Murchison Radioastronomy Observatory, in the desert of Western Australia: one High-Band (90-200 MHz) instrument, and two Low-Band (50-100 MHz) instruments. This talk will describe our main current efforts, corresponding to (1) the analysis of High-Band measurements to determine their consistency with different sets of phenomenological and physical 21-cm models, and (2) the study of the Low-Band data, gathered under different configurations of our two instruments, in order to test and refine our calibration models.