7th International Conference on Gravitation and Cosmology | |
Cosmic microwave and infrared backgrounds cross-correlation for ISW detection | |
Ilic´, S.^1,2 | |
Université Paris-Sud, Institut d'Astrophysique Spatiale, UMR8617, Orsay, F-91405, France^1 | |
CNRS, Orsay, F-91405, France^2 | |
关键词: Angular power spectrum; Cosmic microwaves; Cross correlations; Detectability; Infrared background; Microwave background; Noise terms; Signal to noise; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012034/pdf DOI : 10.1088/1742-6596/484/1/012034 |
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来源: IOP | |
【 摘 要 】
We have investigated the cross-correlation between the cosmic infrared and microwave backgrounds (CIB and CMB) anisotropies through the integrated Sachs-Wolfe effect. We have first described the CIB anisotropies using a linearly biased power spectrum, then derive the theoretical angular power spectrum of the CMB-CIB cross-correlation for different instruments and frequencies. We have discussed the detectability of the ISW signal by performing a signal-to-noise (SNR) analysis with our predicted spectra. The significances obtained range from 6σ to 7σ in an ideal case, depending on the frequency; in realistic cases which account for the presence of noise including astrophysical contaminants, the results span the range 2-5σ, depending strongly on the major contribution to the noise term.
【 预 览 】
Files | Size | Format | View |
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Cosmic microwave and infrared backgrounds cross-correlation for ISW detection | 366KB | download |