http://arxiv.org/abs/1912.12840
The cosmic infrared background (CIB) anisotropies and cosmic microwave background (CMB) lensing are powerful measurements for exploring cosmological and astrophysical problems. In this work, we measure the auto-correlation power spectrum of the CIB anisotropies in the Herschel-SPIRE HerMES Large Mode Survey (HeLMS) field, which covers more than 280 square degrees of the sky, and the cross power spectrum between HeLMS CIB and the CMB lensing from Planck. We use the Herschel Level 1 timeline data to merge the CIB maps at 250, 350 and 500 um bands, and mask the areas where the flux is greater than 3-sigma (~50 mJy/beam) or no measured data. We obtain the final CIB power spectra at 100<ell<20,000 by considering several effects, such as beam function, mode coupling, transfer function, and so on. We also calculate the theoretical CIB auto- and cross-power spectra of CIB and CMB lensing by assuming that the CIB emissivity follows Gaussian distribution in redshift. The Markov chain Monte Carlo (MCMC) method is used to perform a joint fit of the CIB auto-power spectra and cross-power spectra of CIB and CMB lensing data. We find that our model can fit the power spectrum data very well, and obtain basically consistent results with higher accuracy comparing to previous studies.
Y. Cao, Y. Gong, C. Feng, et. al.
Wed, 1 Jan 20
72/88
Comments: 12 pages, 10 figures, 3 tables