TY - JOUR
T1 - Detectability of the 21-cm CMB cross-correlation from the epoch of reionization
AU - Tashiro, Hiroyuki
AU - Aghanim, Nabila
AU - Langer, Mathieu
AU - Douspis, Marian
AU - Zaroubi, Saleem
AU - Jelic, Vibor
PY - 2010/3
Y1 - 2010/3
N2 - The 21-cm line fluctuations and the cosmic microwave background (CMB) are powerful probes of the epoch of reionization of the Universe. We study the potential of the cross-correlation between 21-cm line fluctuations and CMB anisotropy to obtain further constraints on the reionization history. We analytically compute the 21-cm cross-correlation with the CMB temperature anisotropy and polarization, and we calculate the signal-to-noise ratio (S/N) for its detection with together with LOw Frequency ARray (LOFAR), Murchison Widefield Array (MWA) and Square Kilometer Array (SKA). We find, on the one hand, that the 21-cm cross-correlation signal with CMB temperature from the instant reionization can be detected with an S/N of ∼2 for LOFAR and ∼10 for SKA. On the other hand, we confirm that the detection of the 21-cm cross-correlation with CMB polarization is practically infeasible.
AB - The 21-cm line fluctuations and the cosmic microwave background (CMB) are powerful probes of the epoch of reionization of the Universe. We study the potential of the cross-correlation between 21-cm line fluctuations and CMB anisotropy to obtain further constraints on the reionization history. We analytically compute the 21-cm cross-correlation with the CMB temperature anisotropy and polarization, and we calculate the signal-to-noise ratio (S/N) for its detection with together with LOw Frequency ARray (LOFAR), Murchison Widefield Array (MWA) and Square Kilometer Array (SKA). We find, on the one hand, that the 21-cm cross-correlation signal with CMB temperature from the instant reionization can be detected with an S/N of ∼2 for LOFAR and ∼10 for SKA. On the other hand, we confirm that the detection of the 21-cm cross-correlation with CMB polarization is practically infeasible.
KW - Cosmic microwave background
KW - Cosmology: theory
KW - Large-scale structure of Universe
UR - http://www.scopus.com/inward/record.url?scp=77950959091&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2009.16078.x
DO - 10.1111/j.1365-2966.2009.16078.x
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AN - SCOPUS:77950959091
SN - 0035-8711
VL - 402
SP - 2617
EP - 2625
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -