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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Probing reionization with intensity mapping of molecular and fine-structure lines
Astrophysical Journal Letters, Volume 728, No. 2 PART II, Year 2011
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Description
We propose observations of the molecular gas distribution during the era of reionization. At z ∼ 6-8, the 12CO(J = 1-0) line intensity results in a mean brightness temperature of about 0.5 μK with an rms fluctuation of 0.1 μK at 1-10 Mpc spatial scales, corresponding to 30 arcminute angular scales. This intensity fluctuations can be mapped with an interferometer, similar to existing and planned 21 cm background experiments, but operating at ∼ 12-17 GHz. We discuss the feasibility of detecting the cross-correlation between HI and CO molecular gas since such a cross-correlation has the advantage that it will be independent of systematics and most foregrounds in each of the 21 cm and CO(1-0) line experiments. Additional instruments tuned to higher-order transitions of the CO molecule or an instrument operating with high spectral resolution at millimeter wavelengths targeting 158 μm C II could further improve the reionization studies with molecular gas. The combined 21 cm and CO line observations has the potential to establish the relative distribution of gas in the intergalactic medium and molecular gas that are clumped in individual first-light galaxies that are closely connected to the formation of massive stars in these galaxies. © 2011. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
Authors & Co-Authors
Gong, Yan
United States, Irvine
University of California, Irvine
Cooray, Asantha Roshan
United States, Irvine
University of California, Irvine
Silva, Marta B.
Portugal, Lisbon
Instituto Superior Técnico
Santos, Mario G.
Portugal, Lisbon
Instituto Superior Técnico
Lubin, Phillip M.
United States, Santa Barbara
University of California, Santa Barbara
Statistics
Citations: 78
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1088/2041-8205/728/2/L46
ISSN:
20418205