| Issue |
A&A
Volume 539, March 2012
|
|
|---|---|---|
| Article Number | L5 | |
| Number of page(s) | 4 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361/201117930 | |
| Published online | 24 February 2012 | |
Detecting cosmic structure via 21-cm intensity mapping on the Australian Telescope Compact Array
1 Department of Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario, M5S 3H4 n Canada
e-mail: vujanovic@astro.utoronto.ca; gojkov@physics.mcgill.ca
2 Canadian Institute of Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, Ontario, M5S 1A7, Canada
Received: 22 August 2011
Accepted: 5 February 2012
The studies of the nature of dark energy have defined contemporary astrophysics. We report the first detection of a cosmic power spectrum using the Australian Telescope Compact Array interferometer in the 21-cm L-band. We obtained the power spectrum through cross-correlation with optical galaxies, as well as auto-correlation using radio data alone.
Key words: diffuse radiation / large-scale structure of Universe / galaxies: statistics / radio lines: galaxies / techniques: interferometric
© ESO, 2012
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