High spatial resolution mid-infrared observations of the low-mass young star TW Hydrae Th. Ratzka, Ch. Leinert, Th. Henning, J. Bouwman, C. P. Dullemond and W. Jaffe A&A, 471 1 (2007) 173-185 Published online: 18 June 2007 DOI: 10.1051/0004-6361:20077357