A new window towards Cosmic Dawn: the sub-millimetre frontier


    Hamsa Padmanabhan
    Università di Ginevra


The epoch of Cosmic Dawn, when the first stars and galaxies were born, is widely considered the final frontier of observational cosmology today.  The technique of intensity mapping (IM) has emerged as the powerful tool to explore this phase of the Universe by measuring the integrated emission from sources over a broad range of frequencies. A particular advantage of IM is that it provides a tomographic, or three-dimensional picture of the Universe, unlocking several thousand times more independent modes of information than one can obtain from conventional probes.  In addition to hydrogen (the most abundant element), there are exciting prospects for using intensity mapping in the submillimetre wavelengths, from the carbon monoxide (CO), ionized carbon and oxygen ([CII] and [OIII]) lines, as tracers of large-scale structure. I will illustrate how the description of dark matter haloes can be extended to describe the abundances and clustering of molecular and ionic species in the early universe. This innovative approach allows us to fully utilize the latest available observations to constrain cosmological parameters from future observations. I will present a host of fascinating implications for constraining physics beyond the LCDM model, including tests of the theories of inflation,  the nature of dark matter and dark energy.


link al talk che si terrà sulla piattaforma Zoom: https://us02web.zoom.us/j/85752389777?pwd=djhHOUc5d296ekdmNEpTRk9XYnJRdz09