EDP Sciences
Free Access
Volume 385, Number 2, April II 2002
Page(s) 399 - 403
Section Extragalactic astronomy
DOI https://doi.org/10.1051/0004-6361:20020121
Published online 15 April 2002

A&A 385, 399-403 (2002)
DOI: 10.1051/0004-6361:20020121

A CO survey of gravitationally lensed quasars with the IRAM interferometer

R. Barvainis1, D. Alloin2 and M. Bremer3

1  National Science Foundation, 4201 Wilson Boulevard, Arlington VA 22230, USA
2  European Southern Observatory, Casilla 19001, Santiago 19, Chile
3  IRAM, 300 Rue de la Piscine, 38406 St Martin d'Hères, France

(Received 28 September 2001 / Accepted 22 January 2002 )

We present the results of a CO survey of gravitationally lensed quasars, conducted with the Plateau de Bure Interferometer over the last three years. Among the 18 objects surveyed, one was detected in CO line emission, while six were detected in the continuum at 3 mm and three in the continuum at 1 mm. The low CO detection rate may at least in part be due to uncertainties in the redshifts derived from quasar broad emission lines. The detected CO source, the z=3.2 radio quiet quasar MG 0751+2716, is quite strong in the CO(4-3) line and in the millimeter/submillimeter continuum, the latter being emission from cool dust. The integrated CO line flux is $5.96\pm 0.45$ Jy $\cdot$kms -1, and the total molecular gas mass is estimated to be in the range $M_{\rm H_2} = 1.6$- $3.1\times 10^9~M_{\odot}$.

Key words: quasars: general -- gravitational lensing -- quasars: individual: MG0751+2716

Offprint request: R. Barvainis, rbarvai@nsf.gov

SIMBAD Objects in preparation

© ESO 2002

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