The nature of the low-frequency emission of M 51
- D. D. Mulcahy
- A. Horneffer
- R. Beck
- G. Heald
- A. Fletcher
- A. Scaife
- B. Adebahr
- J. M. Anderson
- A. Bonafede
- M. Brüggen
- G. Brunetti
- K. T. Chyży
- J. Conway
- R.-J. Dettmar
- T. Enßlin
- M. Haverkorn
- C. Horellou
- M. Iacobelli
- F. P. Israel
- H. Junklewitz
- W. Jurusik
- J. Köhler
- M. Kuniyoshi
- E. Orrú
- R. Paladino
- R. Pizzo
- W. Reich
- H. J. A. Röttgering
DOIAbstract
Context. Low-frequency radio continuum observations (<300 MHz) can provide valuable information on the propagation of low-energy cosmic ray electrons (CRE). Nearby spiral galaxies have hardly been studied in this frequency range because of the technical challenges of low-frequency radio interferometry. This is now changing with the start of operations of LOFAR. Aims. We aim to study the propagation of low-energy CRE in the interarm regions and the extended disk of the nearly face-on spiral galaxy Messier 51. We also search for polarisation in M 51 and other extragalactic sources in the field. Methods. The grand-design spiral galaxy M 51 was observed with the LOFAR High Frequency Antennas (HBA) and imaged in total intensity a...
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