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Issue A&A
Volume 400, Number 1, March II 2003
Page(s) L5 - L8
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20030107



A&A 400, L5-L8 (2003)
DOI: 10.1051/0004-6361:20030107

Letter

Looking for dust and molecules in Nova V4743 Sagittarii

M. Nielbock and L. Schmidtobreick

European Southern Observatory, Casilla 19001, Santiago 19, Chile
(Received 8 November 2002 / Accepted 24 January 2003 )

Abstract
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 $T_{\rm A}^\star = 0.06$ K for CO and $T_{\rm A}^\star = 0.03$ 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.


Key words: ISM: dust -- ISM: molecules -- stars: novae -- stars: individual: V4743 Sgr

Offprint request: M. Nielbock, mnielboc@eso.org

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© ESO 2003


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