Extracting the Cosmic Web with Line Intensity Mapping

Speaker: Anthony Pullen (NYU) In Person and zoom 

Zoom info: https://stanford.zoom.us/j/93437242416

The cosmic web, the collection of galaxies, filaments, gas, and dark matter that comprises the matter content of our current Universe, can reveal how baryons behave over cosmic scales and across time.  While traditional galaxy surveys trace this web using the rarest, brightest galaxies, line intensity mapping (LIM) can trace the aggregate emission from all sources present in the cosmic web to give us a more complete picture of baryons in the Universe.  However, the processes of star formation and stellar feedback, which affect LIM signals, are highly nonlinear and complex, making inferring the properties of galaxy populations and the intergalactic medium formidable.  In this talk, I will present much of the latest efforts being done to construct emission models of various LIM candidates, as well as describe a framework we are developing to infer the global distribution of galaxy properties from line intensity maps and galaxy surveys.  We also present our latest effort to extract emission signals from current intensity maps, as well as discuss what these results will mean for future efforts with upcoming LIM surveys.