A&A 412, 767-769 (2003)
DOI: 10.1051/0004-6361:20031476

Search for molecular emission from V838 Monocerotis

M. T. Rushton¹, I. M. Coulson², A. Evans¹, L.-Å. Nyman³, B. Smalley¹, T. R. Geballe⁴, J. Th. van Loon¹, S. P. S. Eyres⁵ and V. H. Tyne<sup>1

1</sup>  Astrophysics Group, School of Chemistry and Physics, Keele University, Staffordshire, ST5 5BG, UK
²  Joint Astronomy Centre, 660 N. A`ohoku Place, University Park, Hilo, HI 96720, USA
<sup>3</sup>  European Southern Observatory, Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile
<sup>4</sup>  Gemini Observatory, 670 N. A`ohoku Place, University Park, Hilo, HI 96720, USA
⁵  Centre for Astrophysics, University of Central Lancashire, Preston, Lancashire, PR1 2HE, UK

(Received 21 February 2003 / Accepted 18 September 2003)

Abstract
We present a search for  ¹²CO and SiO emission in V838 Mon. We derive upper limits on the ¹²CO and SiO emission, and on the total mass of the circumstellar material. Using an excitation temperature of 1000 K, and a likely distance of 6 kpc, the non-detection of ¹²CO emission leads to a 3  upper limit on the mass of gas around the central star to be 10 ^-2  .

Key words: stars: circumstellar matter -- stars: individual: V838 Mon

Offprint request: M. T. Rushton, mtr@astro.keele.ac.uk

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