Measurements of the Cross Spectra of the Cosmic Infrared and Microwave Backgrounds from 95 to 1200 GHz

TL;DR

This paper presents comprehensive measurements of the cross spectra of cosmic infrared and microwave backgrounds across six frequency bands, revealing the contributions from various astrophysical sources and extending previous analyses.

Contribution

It provides the first cross-correlation measurements between the CIB peak and 95 GHz maps, covering a broad multipole range with data from South Pole Telescope and Herschel/SPIRE.

Findings

First cross-correlation of CIB peak with 95 GHz maps.

Extended multipole range for power spectra analysis.

Identification of dominant sources of fluctuations.

Abstract

We present measurements of the power spectra of cosmic infrared background (CIB) and cosmic microwave background (CMB) fluctuations in six frequency bands. Maps at the lower three frequency bands, 95, 150, and 220 GHz (3330, 2000, 1360 $\mu$m) are from the South Pole Telescope, while the upper three frequency bands, 600, 857, and 1200 GHz (500, 350, 250 $\mu$m) are observed with Herschel/SPIRE. From these data, we produce 21 angular power spectra (six auto- and fifteen cross-frequency) spanning the multipole range $600 \le \ell \le 11,000$. Our measurements are the first to cross-correlate measurements near the peak of the CIB spectrum with maps at 95 GHz, complementing and extending the measurements from Planck Collaboration et al. (2014) at 218, 550, and 857 GHz. The observed fluctuations originate largely from clustered, infrared-emitting, dusty star-forming galaxies, the CMB, and to a lesser extent radio galaxies, active galactic nuclei, and the Sunyaev-Zel'dovich effect.