An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys
We report new measurements of millimeter-wave power spectra in the angular multipole range $$2000 \le \ell \le 11,000$$ (angular scales $$5^\prime \gtrsim \theta \gtrsim 1^\prime$$). By adding 95 and 150\,GHz data from the low-noise 500 deg$^2$ SPTpol survey to the SPT-SZ three-frequency 2540 deg$^2$$ survey, we substantially reduce the uncertainties in these bands. These power spectra include contributions from the primary cosmic microwave background, cosmic infrared background, radio galaxies, and thermal and kinematic Sunyaev-Zel'dovich (SZ) effects. The data favor a thermal SZ (tSZ) power at 143\,GHz of $$D^{\rm tSZ}_{3000} = 3.42 \pm 0.54~ \mu {\rm K}^2$ and a kinematic SZ (kSZ) power of $$D^{\rm kSZ}_{3000} = 3.0 \pm 1.0~ \mu {\rm K}^2$$. This is the first measurement of kSZ power at $$\ge 3\,\sigma$$. We study the implications of the measured kSZ power for the epoch of reionization, finding the duration of reionization to be $$\Delta z_{re} = 1.0^{+1.6}_{-0.7}$$ ($$\Delta z_{re}< 4.1$$ at 95% confidence), when combined with our previously published tSZ bispectrum measurement.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- SPT
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1661689
- Report Number(s):
- arXiv:2002.06197; FERMILAB-PUB-20-399-AE; oai:inspirehep.net:1781093
- Journal Information:
- TBD, Journal Name: TBD
- Country of Publication:
- United States
- Language:
- English
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