Radio Signals May Reveal Cosmological Structure

Analysis of radio pulses from very distant objects may offer a new way to map the Universe: it is the idea proposed by two researchers at the University of British Columbia, Canada.

Astronomers don't yet know well their nature, but for sure they already know how to use them to measure the distance of the most distant galaxies and so reconstruct the map of their distribution in the universe.

The two researchers Kiyoshi Wesley Masui and Kris Sigurdson have suggested in an paper, published in the journal Physical Review Letters, to use the fast radio bursts or FRBs, enigmatic radio signals lasting just a few milliseconds, to calculate the cosmological distances of distant sources, which originated them.

"We believe that the use of FRBs can help us to understand the distribution of galaxies in the universe", said Kiyoshi Masui, article's lead author. The method proposed by researchers, to measure the distance of the fast radio bursts, is to exploit the phenomenon by which the arrival times of signals, related to each event, are slightly different to varying of the wavelength at which they are observed.

Read the article: http://physics.aps.org/articles/v8/90

Research published in the journal Physical Review Letters:
Dispersion Distance and the Matter Distribution of the Universe in Dispersion Space
Kiyoshi Wesley Masui and Kris Sigurdson
Phys. Rev. Lett. 115, 121301
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.121301

Image explanation: Galaxies galore. This image from the 2MASS Redshift Survey shows the "stringy" distribution of tens of thousands of galaxies in the nearby universe, with colors based on their redshifts (distances from Earth). A proposed technique would use radio bursts from distant sources to produce a statistical description of the large-scale structure of the Universe.
Credit: J. P. Huchra et al., Astrophys. J. Suppl. Ser. 199, 26 (2012)

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