Looking for Dust and Molecules in Nova V 4743 Sagittarii ⋆

We present 1.2 mm continuum images and spectral line observations of CO(1–0) and SiO(3–2) rotational transitions of the recent nova V4743 Sgr. The nova is detected at 1.2 mm showing a variable millimetre emission. Only upper limits of T ⋆ A = 0.06 K for CO and T ⋆ A = 0.03 K for SiO could be derived. We discuss the results in terms the nature of the millimetre emission favouring dust from a phase before the recent outburst as the likely radiating source. We also comment on the possibility of free–free emission from the ionised shell as the source of the measured millimetre radiation.