TY - GEN
T1 - Charting molecular gas through cosmological time
T2 - 2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
AU - Keating, Garrett K.
AU - Bower, Geoffrey C.
AU - Deboer, David R.
AU - Marrone, Daniel
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/16
Y1 - 2014/10/16
N2 - Molecular gas, observed through tracers such as CO rotational transitions, is a vital component of galactic evolution and star formation. Recent detections of the CO molecule in massive galaxies at redshifts as high as z = 6:42 have demonstrated its existence in the early Universe, and have motivated its use as a means of exploring large-scale structure and as a probe of galaxy evolution in the early Universe. But many questions about molecular gas and the evolution of galaxies in the early Universe still remain: its distribution at high redshift understood is so poorly that theoretical models of the mean abundance of CO for z ≥ 2 span orders of magnitude. Direct detection of molecular gas in galaxies at these redshifts (with instruments like the VLA) have only found the largest and most luminous of galaxies at these redshifts (typically containing 1010Mo of molecular gas and star formation rates of 100Moyr-1), whereas the bulk of the molecular gas is expected to be in the unseen masses of smaller galaxies (Mgas ∼ 108Mo; SFR ∼ 1Mo yr-1). While difficult to detect individually, these smaller galaxies are likely detectable as an integrated ensemble with the technique of 'intensity mapping'. This technique, similar to those employed by HI epoch of reionization experiments, utilizes measurements of different 3D Fourier modes to construct a power spectrum.
AB - Molecular gas, observed through tracers such as CO rotational transitions, is a vital component of galactic evolution and star formation. Recent detections of the CO molecule in massive galaxies at redshifts as high as z = 6:42 have demonstrated its existence in the early Universe, and have motivated its use as a means of exploring large-scale structure and as a probe of galaxy evolution in the early Universe. But many questions about molecular gas and the evolution of galaxies in the early Universe still remain: its distribution at high redshift understood is so poorly that theoretical models of the mean abundance of CO for z ≥ 2 span orders of magnitude. Direct detection of molecular gas in galaxies at these redshifts (with instruments like the VLA) have only found the largest and most luminous of galaxies at these redshifts (typically containing 1010Mo of molecular gas and star formation rates of 100Moyr-1), whereas the bulk of the molecular gas is expected to be in the unseen masses of smaller galaxies (Mgas ∼ 108Mo; SFR ∼ 1Mo yr-1). While difficult to detect individually, these smaller galaxies are likely detectable as an integrated ensemble with the technique of 'intensity mapping'. This technique, similar to those employed by HI epoch of reionization experiments, utilizes measurements of different 3D Fourier modes to construct a power spectrum.
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U2 - 10.1109/USNC-URSI-NRSM.2014.6928118
DO - 10.1109/USNC-URSI-NRSM.2014.6928118
M3 - Conference contribution
AN - SCOPUS:84911468526
T3 - 2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
BT - 2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 8 January 2014 through 11 January 2014
ER -