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Paper detail

Q0957+561 revised: CO emission from a disk at z=1.4

Based on additional interferometric observations, we reanalysed the CO(2-1) and 3mm continuum emission of Q0957+561, a lensed QSO at a redshift of z=1.4141. The emission in the CO(2-1) lines reveals a gas-rich host galaxy with a peculiar double-peaked profile at one of the two lensed images. Our new interferometric CO maps of the host galaxy agree well with HST images obtained by Keeton et al. (2000) and we thus argue that the two velocity components arise from molecular gas in the disk of the host galaxy. We also present new model calculations, all in excellent agreement with recent time delay measurements and simulations.

preprint2004arXivOpen access
M. KripsR. NeriA. EckartD. DownesJ. Martin-PintadoP. Planesas
astro-ph
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M. KripsR. NeriA. EckartD. DownesJ. Martin-PintadoP. Planesas

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