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Molecular Gas at High Redshift

Molecular Gas at High Redshift

Molecular Gas at High Redshift

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frequency [GHz]<br />

practical issues<br />

CO transitions as function of redshift, f(T, ρ)<br />

PdBI/ALMA<br />

submm band<br />

PdBI/ALMA<br />

1mm band<br />

significant coverage in frequency space<br />

PdBI 2mm band<br />

PdBI/ALMA 3mm band<br />

<strong>at</strong> high redshift: can only detect high-J CO<br />

transitions<br />

Mgas (fuel for SF, evol. st<strong>at</strong>e, tdep)<br />

Excit<strong>at</strong>ion => ngas , Tkin (phys. conditions for SF)<br />

Imaging => Σgas ,Mdyn (sys. potential => Mtot)

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