Interpreting the extended emission around three nearby debris disc host stars J. P. Marshall, F. Kirchschlager, S. Ertel, J.-C. Augereau, G. M. Kennedy, M. Booth, S. Wolf, B. Montesinos, C. Eiroa and B. Matthews A&A, 570 (2014) A114 Published online: 31 October 2014 DOI: 10.1051/0004-6361/201424517