Issue |
A&A
Volume 580, August 2015
|
|
---|---|---|
Article Number | A119 | |
Number of page(s) | 18 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361/201526228 | |
Published online | 14 August 2015 |
Forecasts for the detection of the magnetised cosmic web from cosmological simulations⋆
1 Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany
e-mail: franco.vazza@hs.uni-hamburg.de
2 INAF/Istituto di Radioastronomia, via Gobetti 101, 40129 Bologna, Italy
3 Laboratoire Lagrange, UMR 7293, Université Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d’Azur, 06300 Nice, France
4 CSCS, via Trevano 131, 6900 Lugano, Switzerland
5 NVIDIA, Santa Clara, CA 95050, USA
Received: 31 March 2015
Accepted: 20 June 2015
The cosmic web contains a large part of the total gas mass in the Universe, but it is difficult to detect at most wavelengths. Synchrotron emission from shock-accelerated electrons may offer the chance of imaging the cosmic web at radio wavelengths. In this work we use 3D cosmological ENZO-magnetohydrodynamic simulations (combined with a post-processing renormalisation of the magnetic field to bracket for missing physical ingredients and resolution effects) to produce models of the radio emission from the cosmic web. In post-processing we study the capabilities of 13 large radio surveys to detect this emission. We find that surveys by LOFAR, SKA1-LOW, and MWA have a chance of detecting the cosmic web, provided that the magnetisation level of the tenuous medium in filaments is of the order of ~1% of the thermal gas energy.
Key words: acceleration of particles / magnetic fields / radio continuum: galaxies / intergalactic medium / shock waves
Appendix A is available in electronic form at http://www.aanda.org
© ESO, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.