Subarcsecond mid-infrared and radio observations of the W3 IRS5 protocluster F. F. S. van der Tak, P. G. Tuthill and W. C. Danchi A&A, 431 3 (2005) 993-1005 Published online: 16 February 2005 DOI: 10.1051/0004-6361:20041595