Publication Abstracts
Chiang et al. 2003
Chiang, L.-Y., P.D. Naselsky, O.V. Verkhodanov, and
, 2003: Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data. Astrophys. J., 590, L65-L68, doi:10.1086/376822.We present non-Gaussianity testing on derived maps from the recently released first-year Wilkinson Microwave Anisotropy Probe data by Tegmark, de Oliveria-Costa, & Hamilton. Our test is based on a phase-mapping technique that has the advantage of testing non-Gaussianity at separate multipole bands. We show that their foreground-cleaned map is against the random-phase hypothesis at all four multipole bands centered around l = 150, 290, 400, and 500. Their Wiener-filtered map, on the other hand, is Gaussian for l < 250 and marginally Gaussian for 224 < l < 350. However, we see the evidence of non-Gaussianity for l > 350 as we detect certain degrees of phase coupling, hence against the random-phase hypothesis. Our phase-mapping technique is particularly useful for testing the accuracy of component separation methods.
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BibTeX Citation
@article{ch06800b, author={Chiang, L.-Y. and Naselsky, P. D. and Verkhodanov, O. V. and Way, M. J.}, title={Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data}, year={2003}, journal={Astrophysical Journal}, volume={590}, pages={L65--L68}, doi={10.1086/376822}, }
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RIS Citation
TY - JOUR ID - ch06800b AU - Chiang, L.-Y. AU - Naselsky, P. D. AU - Verkhodanov, O. V. AU - Way, M. J. PY - 2003 TI - Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data JA - Astrophys. J. JO - Astrophysical Journal VL - 590 SP - L65 EP - L68 DO - 10.1086/376822 ER -
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