Gas without stars? Elucidating the nature of a highly unusual CO line emitter in the early universe.

Details Gas without stars? Elucidating the nature of a highly unusual CO line emitter in the early universe. Gas without stars? Elucidating the nature of a highly unusual CO line emitter in the early universe.

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60147n&link_type=abstract

Spitzer Proposal ID #60147

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Scientific paper

We propose to obtain deep IRAC photometry at 3.6um to investigate the nature of a highly peculiar, luminous CO line emitter which does not appear to be associated with a significant stellar mass. TXS0828+193 SW1/2 is in the halo of the powerful radio galaxy (HzRG) TXS0828+193 at redshift z~2.6, at a radial distance of 85 kpc from the radio galaxy and near the hot spot of the radio jet. The CO(3-2) emission line luminosity of SW1/2 corresponds to a total mass of about 2x 10^10 M_sun in cold molecular gas, similar to that of strongly star-forming, massive submillimeter galaxies at similar redshifts. . Intriguingly, we do not find a counterpart at rest-frame UV to mid-infrared wavelengths, which suggests a much lower stellar mass of

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