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Colloquium – Azadeh Moradinezhad Dizgah’s “Cosmology and astrophysics with intensity mapping beyond 21cm: forecast and modelling”
January 26, 2023 @ 12:45 pm - 1:45 pm
“Cosmology and astrophysics with intensity mapping beyond 21cm: forecast and modelling”
Abstract:
Line intensity mapping (LIM) is emerging as a powerful technique to map the cosmic large-scale structure. Measurement of spatial fluctuations in the intensity of spectral lines together with their observed frequency provide a spectroscopic three-dimensional map of the structure over a wide range of scales and redshifts. Considering several emission lines (including rotational lines of carbon monoxide, fine structure line of ionized carbon, and oxygen lines), in the first part of the talk, I will discuss the prospects of future ground- and space-based LIM surveys in constraining fundamental physics and astrophysics. In particular, I will present forecasts showing the potential of LIM in probing primordial non-Gaussianity, properties of neutrinos and light relics, and possible modifications to gravity. Furthermore, I will discuss the possibility of probing formation channels of binary compact objects taking advantage of the synergies between LIM and gravitational wave observations. In the second part of the talk, after discussing some of the shortcomings of the existing models of line intensity power spectrum, I will present an extended halo model (tested against simulated intensity maps), which significantly improves upon the commonly applied approximations.
Azadeh Moradinezhad Dizgah, University of Geneva, Switzerland
Thursday, January 26, 2023 @ 12:45 PM – 1:45 PM EST
Zoom Meeting ID: 3472351927
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https://ufl.zoom.us/j/3472351927
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