Diagnosing timing error in <i>WMAP</i> data

Liu, Hao; Xiong, S. L.; Li, Ti-Pei

doi:10.1111/j.1745-3933.2011.01041.x

Cited by 9 publications

(12 citation statements)

References 19 publications

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“…We have confirmed this finding with different method (Liu, Xiong & Li, 2011), and the obtained results are very well consistent to Roukema (2010b). This seems to be puzzling: How can the same problem, the antenna pointing issue, be confirmed and rejected at the same time?…”

Section: Not the End: More Details Discoveredsupporting

confidence: 80%

“…In Liu, Xiong & Li (2010), we have discovered that the WMAP spacecraft attitude data are asynchronous to the CMB differential data, thus existence of the timing error is apparently possible. This is further confirmed in Liu, Xiong & Li (2011) and Roukema (2010b).…”

Section: Real Pointing Vector Errorsupporting

confidence: 67%

“…Thus the evidences found in Roukema (2010a) doesn't in principle conflict with Roukema (2010b) and Liu, Xiong & Li (2011). Moreover, all these three articles have also pointed out that the antenna pointing error can possibly take effect in the calibration stage without blurring the final image, which lead to the same conclusion.…”

Section: • Timing Error • Sidelobe Uncertaintysupporting

confidence: 58%

“…11 tell us more, that even if the antenna pointing vectors are accurate, it's still impossible to conclude that the CMB results are hence reliable. Not to mention the fact confirmed by Roukema (2010b) and Liu, Xiong & Li (2011) that there are more potential uncertainties in the data calibration. Thus it's really too early to be so sure about the CMB detection or a final CMB model right now.…”

Section: According To Equation 8 and Equation 11mentioning

confidence: 72%

See 3 more Smart Citations

Systematics in WMAP and Other CMB Missions

Líu¹,

Li²

2012

Space Science

Self Cite

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Section: Not the End: More Details Discoveredsupporting

confidence: 80%

Section: Real Pointing Vector Errorsupporting

confidence: 67%

Section: • Timing Error • Sidelobe Uncertaintysupporting

confidence: 58%

Section: According To Equation 8 and Equation 11mentioning

confidence: 72%

See 2 more Smart Citations

Systematics in WMAP and Other CMB Missions

Líu¹,

Li²

2012

Space Science

Self Cite

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“…[24][25][26][27][28][29][30][31][32][33][34][35] In the analysis on the behavior of the temperature anisotropy power spectrum, the temperature°uctuation is expanded in spherical harmonics. The¯rst three lowest multipoles include dipole (l ¼ 1), quadrupole (l ¼ 2), and octupole (l ¼ 3).…”

Section: Introductionmentioning

confidence: 99%

String Theory Explanation of Large-Scale Anisotropy and Anomalous Alignment

Sha¹,

Xiu²

2018

Rep. Adv. Phys. Sci.

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The discovery of anomalies in the cosmic microwave background (CMB) indicates large-scale anisotropies, non-Gaussian distributions, and anomalous alignments of the quadrupole and octupole modes of the anisotropy with each other and with both the ecliptic and equinoxes. Further analysis indicates that the statistical anisotropy and non-Gaussian temperature°u ctuations are mainly due to long-range correlations. However, the source of the large-scale correlation and the cause of the anomalous alignment in CMB remains unknown. In this work, we show a new development in string theory, the universal wave function interpretation of string theory (UWFIST) indicates the existence of large-scale quantum vibrations. These largescale quantum vibrations can cause the large-scale correlation and anomalous alignment observed in the background¯eld. They can explain the observed large-scale anisotropies, non-Gaussian distributions, and anomalous alignments of the quadrupole and octupole modes in the microwave background.Keywords: Dark energy; anomalies in cosmic microwave background; string theory; large-scale anisotropies; anomalous alignments of the quadrupole and octupole modes of the anisotropy; universal wave function interpretation of string theory.

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The Diffuse Light of the Universe

Bonnet‐Bidaud

2016

Found Phys

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In 1965, the discovery of a new type of uniform radiation, located between radiowaves and infrared light, was accidental. Known today as Cosmic Microwave background (CMB), this diffuse radiation is commonly interpreted as a fossil light released in an early hot and dense universe and constitutes today the main 'pilar' of the big bang cosmology. Considerable efforts have been devoted to derive fundamental cosmological parameters from the characteristics of this radiation that led to a surprising universe that is shaped by at least three major unknown components: inflation, dark matter and dark energy. This is an important weakness of the present consensus cosmological model that justifies raising several questions on the CMB interpretation. Can we consider its cosmological nature as undisputable? Do other possible interpretations exist in the context of other cosmological theories or simply as a result of other physical mechanisms that could account for it? In an effort to questioning the validity of scientific hypotheses and the under-determination of theories compared to observations, we examine here the difficulties that still exist on the interpretation of this diffuse radiation and explore other proposed tracks to explain its origin. We discuss previous historical concepts of diffuse radiation before and after the CMB discovery and underline the limit of our present understanding.

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Diagnosing timing error in WMAP data

Cited by 9 publications

References 19 publications

Systematics in WMAP and Other CMB Missions

Systematics in WMAP and Other CMB Missions

String Theory Explanation of Large-Scale Anisotropy and Anomalous Alignment

The Diffuse Light of the Universe

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