Studying Galactic interstellar turbulence through fluctuations in synchrotron emission
- Iacobelli, M.
- Haverkorn, M.
- Orrú, E.
- Pizzo, R. F.
- Anderson, J.
- Beck, R.
- Bell, M. R.
- Bonafede, A.
- Chyzy, K.
- Dettmar, R.-J.
- Enßlin, T. A.
- Heald, G.
- Horellou, C.
- Horneffer, A.
- Jurusik, W.
- Junklewitz, H.
- Kuniyoshi, M.
- Mulcahy, D. D.
- Paladino, R.
- Reich, W.
- Scaife, A.
- Sobey, C.
- Sotomayor-Beltran, C.
- Alexov, A.
- Bell, M. E.
- Asgekar, A.
- Avruch, I. M.
- Van Bemmel, I.
- Bentum, M. J.
- Bernardi, G.
- Best, P.
- Bırzan, L.
- Breitling, F.
- Broderick, J.
- Brouw, W. N.
- Brüggen, M.
- Butcher, H. R.
- Ciardi, B.
- Conway, J. E.
- De Gasperin, F.
- de Geus, E.
- Duscha, S.
- Eislöffel, J.
- Engels, D.
- Falcke, H.
- Fallows, R. A.
- Ferrari, C.
- Frieswijk, W.
- Garrett, M. A.
- Grießmeier, Jean-Mathias
- Gunst, A. W.
- Hamaker, J. P.
- Hassall, T. E.
- Hessels, J. W. T.
- Hoeft, M.
- Hörandel, J.
- Jelic, V.
- Karastergiou, A.
- Kondratiev, V. I.
- Koopmans, L. V. E.
- Kramer, M.
- Kuper, G.
- Van Leeuwen, J.
- Macario, G.
- Mann, G.
- McKean, J. P.
- Munk, H.
- Pandey-Pommier, M.
- Polatidis, A. G.
- Röttgering, H.
- Schwarz, D.
- Sluman, J.
- Smirnov, O.
- Stappers, B. W.
- Steinmetz, M.
- Tagger, Michel
- Tang, Y.
- Tasse, C.
- Toribio, C.
- Vermeulen, R.
- Vocks, C.
- Vogt, C.
- van Weeren, R. J.
- Wise, M. W.
- Wucknitz, O.
- Yatawatta, S.
- Zarka, P.
- Zensus, A.
DOIAbstract
International audienceAims: The characteristic outer scale of turbulence (i.e. the scale at which the dominant source of turbulence injects energy to the interstellar medium) and the ratio of the random to ordered components of the magnetic field are key parameters to characterise magnetic turbulence in the interstellar gas, which affects the propagation of cosmic rays within the Galaxy. We provide new constraints to those two parameters.Methods: We use the LOw Frequency ARray (LOFAR) to image the diffuse continuum emission in the Fan region at (l,b) ~ (137.0°, +7.0°) at 80' × 70' resolution in the range [146, 174] MHz. We detect multi-scale fluctuations in the Galactic synchrotron emission and compute their power spectrum. Applying theoret...
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