Title: The Deep Synoptic Array Science: A mission to unravel the mystery of Fast Radio Bursts

Speaker: Kritti Sharma, Caltech, California

Abstract: Fast Radio Bursts (FRBs) are millisecond-duration enigmatic transients. Their high dispersion measures are suggestive of extragalactic origins. The scientific community is primarily interested in deciphering the mystery of their sources and emission mechanisms, as well as using FRBs as cosmological probes by leveraging the information of cold plasma in the intergalactic medium embedded in their dispersion measures. To cater to these goals, arcsecond-scale localization and confident associations to respective host galaxies are quintessential. The Deep Synoptic Array (DSA) is an extensive array of 110 antennas designed to detect and pinpoint FRBs to their host galaxies at a world-leading rate. In this talk, I will present the first results from the FRB sample. These results shed new light on the emission mechanisms and origins of FRBs, highlighting the roles of multiple progenitor channels. Certain DSA-110 discoveries have also enabled tantalizing measurements of the content of the Milky Way Circum-Galactic Medium and the Intra-Cluster Medium of nearby massive galaxy clusters. I will conclude by introducing the upcoming DSA-2000 radio camera, which will transform our access to the radio sky. With unmatched survey speed for continuum, spectral-line and short-timescale emission in the 0.7-2 GHz band, the DSA-2000 will address frontier questions on our cosmic history, and in multi-messenger and time-domain astrophysics.