Testing the $\mathbf{\Lambda}$CDM Cosmological Model with Forthcoming Measurements of the Cosmic Microwave Background with SPT-3G
2024
Online
report
We forecast constraints on cosmological parameters enabled by three surveys conducted with SPT-3G, the third-generation camera on the South Pole Telescope. The surveys cover separate regions of 1500, 2650, and 6000 ${\rm deg}^{2}$ to different depths, in total observing 25% of the sky. These regions will be measured to white noise levels of roughly 2.5, 9, and 12 $\mu{\rm K-arcmin}$, respectively, in CMB temperature units at 150 GHz by the end of 2024. The survey also includes measurements at 95 and 220 GHz, which have noise levels a factor of ~1.2 and 3.5 times higher than 150 GHz, respectively, with each band having a polarization noise level ~$\sqrt{\text{2}}$ times higher than the temperature noise. We use a novel approach to obtain the covariance matrices for jointly and optimally estimated gravitational lensing potential bandpowers and unlensed CMB temperature and polarization bandpowers. We demonstrate the ability to test the $\Lambda{\rm CDM}$ model via the consistency of cosmological parameters constrained independently from SPT-3G and Planck data, and consider the improvement in constraints on $\Lambda{\rm CDM}$ extension parameters from a joint analysis of SPT-3G and Planck data. The $\Lambda{\rm CDM}$ cosmological parameters are typically constrained with uncertainties up to ~2 times smaller with SPT-3G data, compared to Planck, with the two data sets measuring significantly different angular scales and polarization levels, providing additional tests of the standard cosmological model.
Comment: 26 pages; 13 figures; to be submitted to ApJ; comments welcome
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Testing the $\mathbf{\Lambda}$CDM Cosmological Model with Forthcoming Measurements of the Cosmic Microwave Background with SPT-3G
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Autor/in / Beteiligte Person: | Prabhu, K. ; Raghunathan, S. ; Millea, M. ; Lynch, G. ; Ade, P. A. R. ; Anderes, E. ; Anderson, A. J. ; Ansarinejad, B. ; Archipley, M. ; Balkenhol, L. ; Benabed, K. ; Bender, A. N. ; Benson, B. A. ; Bianchini, F. ; Bleem, L. E. ; Bouchet, F. R. ; Bryant, L. ; Camphuis, E. ; Carlstrom, J. E. ; Cecil, T. W. ; Chang, C. L. ; Chaubal, P. ; Chichura, P. M. ; Chou, T. L. ; Coerver, A. ; Crawford, T. M. ; Cukierman, A. ; Daley, C. ; de Haan, T. ; Dibert, K. R. ; Dobbs, M. A. ; Doussot, A. ; Dutcher, D. ; Everett, W. ; Feng, C. ; Ferguson, K. R. ; Fichman, K. ; Foster, A. ; Galli, S. ; Gambrel, A. E. ; Gardner, R. W. ; Ge, F. ; Goeckner-Wald, N. ; Gualtieri, R. ; Guidi, F. ; Guns, S. ; Halverson, N. W. ; Hivon, E. ; Holder, G. P. ; Holzapfel, W. L. ; Hood, J. C. ; Hryciuk, A. ; Huang, N. ; Kéruzoré, F. ; Knox, L. ; Korman, M. ; Kornoelje, K. ; Kuo, C. L. ; Lee, A. T. ; Levy, K. ; Lowitz, A. E. ; Lu, C. ; Maniyar, A. ; Menanteau, F. ; Montgomery, J. ; Nakato, Y. ; Natoli, T. ; Noble, G. I. ; Novosad, V. ; Omori, Y. ; Padin, S. ; Pan, Z. ; Paschos, P. ; Phadke, K. A. ; Quan, W. ; Rahimi, M. ; Rahlin, A. ; Reichardt, C. L. ; Rouble, M. ; Ruhl, J. E. ; Schiappucci, E. ; Smecher, G. ; Sobrin, J. A. ; Stark, A. A. ; Stephen, J. ; Suzuki, A. ; Tandoi, C. ; Thompson, K. L. ; Thorne, B. ; Trendafilova, C. ; Tucker, C. ; Umilta, C. ; Vitrier, A. ; Vieira, J. D. ; Wan, Y. ; Wang, G. ; Whitehorn, N. ; Wu, W. L. K. ; Yefremenko, V. ; Young, M. R. ; Zebrowski, J. A. |
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Veröffentlichung: | 2024 |
Medientyp: | report |
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