Mapping Large-Scale-Structure Evolution over Cosmic Times

Marta B. Silva, Ely D. Kovetz, Garrett K. Keating, Azadeh Moradinezhad Dizgah, Matthieu Bethermin, Patrick C. Breysse, Kirit Karkare, José L. Bernal, Jacques Delabrouille

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


This paper outlines the science case for line-intensity mapping with a space-borne instrument targeting the sub-millimeter (microwaves) to the far-infrared (FIR) wavelength range. Our goal is to observe and characterize the large-scale structure in the Universe from present times to the high redshift Epoch of Reionization. This is essential to constrain the cosmology of our Universe and form a better understanding of various mechanisms that drive galaxy formation and evolution. The proposed frequency range would make it possible to probe important metal cooling lines such as [CII] up to very high redshift as well as a large number of rotational lines of the CO molecule. These can be used to trace molecular gas and dust evolution and constrain the buildup in both the cosmic star formation rate density and the cosmic infrared background (CIB). Moreover, surveys at the highest frequencies will detect FIR lines which are used as diagnostics of galaxies and AGN. Tomography of these lines over a wide redshift range will enable invaluable measurements of the cosmic expansion history at epochs inaccessible to other methods, competitive constraints on the parameters of the standard model of cosmology, and numerous tests of dark matter, dark energy, modified gravity and inflation. To reach these goals, large-scale structure must be mapped over a wide range in frequency to trace its time evolution and the surveyed area needs to be very large to beat cosmic variance. Only a space-borne mission can properly meet these requirements.

Original languageEnglish
Pages (from-to)1593-1622
Number of pages30
JournalExperimental Astronomy
Issue number3
StatePublished - 7 Jul 2021


  • (cosmology:) Cosmological parameters
  • (cosmology:) Large-scale structure of universe
  • Galaxies: evolution
  • Galaxies: high-redshift
  • Submillimeter: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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