Cosmology
Cosmology Working Group Introduction
The SKA will enable pioneering cosmological surveys, probing immense volumes of the Universe which to date have been unexplored at radio wavelengths. This will be done by observing emission in both radio continuum and the 21 cm spectral line of neutral hydrogen (HI). The position in the radio sky of million of galaxies, and intensity maps made by their collective HI emission, trace the large-scale structure of the Universe, which can reveal the form and growth of dark matter structures over time. Light travelling from distant galaxies is bent by the intervening dark matter, thus creating small shape distortions (weak gravitational lensing) that can be measured to detect this otherwise invisible component. These surveys will enhance our understanding of various aspects of cosmic history, including the faint imprints of the primordial period of inflation, the early stages of galaxy formation, as well as the nature of gravity, dark energy and dark matter which determine the growth of late time large-scale structure.
Related 2015 “Advancing Astrophysics with the Square Kilometre Array” Chapters
- See appropriate section here
Related 2004 “Science with the Square Kilometre Array” Chapters
- “Galaxy evolution, cosmology and dark energy with the Square Kilometre Array” Rawlings et al.
- “21cm tomography of the high-redshift univers with the Square Kilometre Array” Furlanetto & Briggs
- “Cosmology with the SKA” Blake et al.
- “Extragalactic water masers, geometric estimation of H0 and characterization of dark energy” Greenhill
- “Strong gravitational lensing with SKA” Koopmans et al.
- “Measuring changes in the fundamental constants with redshifted radio absorption lines” Curran et al.
- “Sunyaev-Zeldovich effects, free-free emission, and imprints on the cosmic microwave background” Burigana et al.
- “Searching for intergalacic shocks with the Square Kilometre Array” Keshet et al.
Working Group Membership
Members of the the Cosmology Working group can be found here
Please contact the co-chairs if you are interested in joining the group.
The current co-chairs are:
- Stefano Camera (Universita’ degli studi di Torino, Italy), stefano.camera@unito.it
- Marta Spinelli (Institute for Particle Physics and Astrophysics, ETH Zürich, Switzerland), spinemart@gmail.com
Membership details can be found here
Previous Chairs
- Laura Wolz 2017-2021
- Richard Battye 2017-2019
- Mario Santos 2015-2017
- Xuelei Chen 2015-2017
- Roy Maartens 2013-2015