The CO Mapping Array Pathfinder (COMAP) will open a new window on both the Epoch of Reionization (EoR) and the Epoch of Galaxy Assembly by using carbon monoxide (CO) lines to trace the distribution of star-forming galaxies in both epochs. Phase I of COMAP comprises a 10-m telescope, located at the Owens Valley Radio Observatory (OVRO), equipped with a 19-pixel spectrometer array that will map a total of 10 square degrees of sky in the frequency range 30-34 GHz, with spectral resolution R~800. This band will be sensitive to CO(1-0) in the redshift slice z=2.4-2.8 and to CO(2-1) in the redshift slice z = 5.8-6.7.Constraining the CO power spectrum from the EoR will ultimately require measurements at multiple frequencies and arrays with hundreds of elements. The aim of this pathfinder experiment is to i) demonstrate the feasibility and future potential of wide-field CO intensity mapping, and ii) provide a test-bed for the technology development and observational strategies. Phase I of COMAP will focus on constraining the CO power spectrum from the Epoch of Galaxy Assembly, at z=2.4-2.8. A wide range of predictions for the strength of this power spectrum have appeared in the literature; much of this range can either be confirmed or ruled out by COMAP.Cross-correlation with galaxy surveys in this redshift range will allow us to disentangle the impact of cosmological parameters, star formation rate (SFR) and the CO-SFR connection. Cross-correlation will also establish confidence that the observed signal is CO and allow inferences to be drawn about the unobserved, but CO-luminous galaxy population. The COMAP fields will therefore be chosen to overlap with galaxy surveys.COMAP Phase I observations are planned to start in late 2017, continuing until late 2019.
American Astronomical Society Meeting Abstracts #227
- Pub Date:
- January 2016