A coincidence between a hydrocarbon plasma absorption spectrum and the λ5450 DIB H. Linnartz, N. Wehres, H. Van Winckel, G. A. H. Walker, D. A. Bohlender, A. G. G. M. Tielens, T. Motylewski and J. P. Maier A&A, 511 (2010) L3 Published online: 26 February 2010 DOI: 10.1051/0004-6361/201014019