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Power Spectrum of Primordial Inhomogeneity Determined from the FOUR-Year [ITAL]COBE[/ITAL] DMR Sky Maps
Open accessAbstract
Fourier analysis and power spectrum estimation of the cosmic microwave background anisotropy on an incompletely sampled sky developed by Górski has been applied to the 4 yr COBE DMR 31.5, 53, and 90 GHz sky maps. Likelihood analysis using newly constructed Galaxy cuts (extended beyond | b | = 20° to excise the known foreground emission) and simultaneously correcting for the faint high-latitude Galactic foreground emission is conducted on the DMR sky maps pixelized in both ecliptic and Galactic coordinates. The Bayesian power spectrum estimation from the foreground-corrected 4 yr COBE DMR data renders n ~ 1.2 ± 0.3 and Q rms-PS ~ 15.3 −2.8 +3.7 μK (projections of the two-parameter likelihood). The results are consistent with the Harrison-Zeldovich n = 1 model of amplitude Q rms-PS ~ 18 μK detected with significance exceeding 14 σ (δ Q / Q ≲ 0.07). (A small power spectrum amplitude drop below the published 2 yr results is predominantly due to the application of the new, extended Galaxy cuts.)
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Cited by
Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., Limon, M., Meyer, S. S., Page, L., Spergel, D. N., Tucker, G. S., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377253 · Cited by 4,860
Self-citationCosmic Concordance and Quintessence
Wang, L., Caldwell, R. R., Ostriker, J. P., & Steinhardt, P. J. (2000) · The Astrophysical Journal · doi:10.1086/308331 · Cited by 451
The 4 Year COBE Normalization and Large‐Scale Structure
Bunn, E. F., & White, M. (1997) · The Astrophysical Journal · doi:10.1086/303955 · Cited by 423
Davies, R. D., Dickinson, C., Banday, A. J., Jaffe, T. R., Górski, K. M., & Davis, R. J. (2006) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2006.10572.x · Cited by 165
Self-citationFüzfa, A., & Alimi, J.-M. (2007) · Physical Review D · doi:10.1103/physrevd.75.123007 · Cited by 41
Metadata
- Authors
- Górski, K. M., Banday, A. J., Bennett, C. L., Hinshaw, G., Kogut, A., Smoot, G. F., & Wright, E. L.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1996-06-10
- Volume
- 464
- Issue
- 1
- Pages
- L11-L15
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W2141436987
- Cited by
- 230
- References
- 0
- FWCI
- 28.65
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Power Spectrum of Primordial Inhomogeneity Determined from the FOUR-Year [ITAL]COBE[/ITAL] DMR Sky Maps. https://app.cochat.ai/papers/10.1086/310077
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- Górski, K. M., Banday, A. J., Bennett, C. L., Hinshaw, G., Kogut, A., Smoot, G. F., & Wright, E. L. (1996). Power Spectrum of Primordial Inhomogeneity Determined from the FOUR-Year [ITAL]COBE[/ITAL] DMR Sky Maps. The Astrophysical Journal. https://doi.org/10.1086/310077
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