The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.
Detection of a non-Gaussian spot in WMAP
Open accessAbstract
An extremely cold and big spot in the Wilkinson Microwave Anisotropy Probe (WMAP) 1-yr data is analysed. Our work is a continuation of a previous paper by Vielva et al. that reported the detection of non-Gaussianity, with a method based on the spherical Mexican hat wavelet (SMHW) technique. We study the spots at different thresholds on the SMHW coefficient maps, considering six estimators, namely the number of maxima, the number of minima, the numbers of hot and cold spots, and the number of pixels of those spots. At SMHW scales around 4° (10° on the sky), the data deviate from Gaussianity. The analysis is performed on all of the sky, the Northern and Southern hemispheres, and on four regions covering all of the sky. A cold spot at (b=-57°, l= 209°) is found to be the source of this non-Gaussian signature. We compare the spots of our data with 10 000 Gaussian simulations, and conclude that only around 0.2 per cent of them present such a cold spot. Excluding this spot, the remaining map is compatible with Gaussianity, and even the excess of kurtosis in the paper by Vielva et al. is found to be due exclusively to this spot. Finally, we study whether the spot causing the observed deviation from Gaussianity could be generated by systematics or foregrounds. None of them seem to be responsible for the non-Gaussian detection.
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Cites
Spergel, D. N., Verde, L., Peiris, H. V., Komatsu, E., Nolta, M. R., Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377226 · Cited by 10,976
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
A Line-of-Sight Integration Approach to Cosmic Microwave Background Anisotropies
Seljak, U., & Zaldarriaga, M. (1996) · The Astrophysical Journal · doi:10.1086/177793 · Cited by 2,019
A line of sight integration approach to cosmic microwave background anisotropiesPreprint
Zaldarriaga, M. (1996) · Cited by 1,367
First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Foreground Emission
Bennett, C. L., Hill, R. S., Hinshaw, G., Nolta, M. R., Odegard, N., Page, L., Spergel, D. N., Weiland, J. L., Wright, E. L., Halpern, M., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377252 · Cited by 991
Asymmetries in the Cosmic Microwave Background Anisotropy Field
Eriksen, H. K., Hansen, F. K., Banday, A. J., Gorski, K. M., & Lilje, P. B. (2004) · The Astrophysical Journal · doi:10.1086/382267 · Cited by 767
Gauge-invariant second-order perturbations and non-Gaussianity from inflation
Acquaviva, V., Bartolo, N., Matarrese, S., & Riotto, A. (2003) · Nuclear Physics B · doi:10.1016/s0550-3213(03)00550-9 · Cited by 723
First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Tests of Gaussianity
Komatsu, E., Kogut, A., Nolta, M. R., Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Limon, M., Meyer, S. S., Page, L., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377220 · Cited by 690
ROSAT Survey Diffuse X‐Ray Background Maps. II.
Snowden, S. L., Egger, R., Freyberg, M. J., McCammon, D., Plucinsky, P. P., Sanders, W. T., Schmitt, J. H. M. M., Trumper, J., & Voges, W. (1997) · The Astrophysical Journal · doi:10.1086/304399 · Cited by 602
Vielva, P., Martinez‐Gonzalez, E., Barreiro, R. B., Sanz, J. L., & Cayon, L. (2004) · The Astrophysical Journal · doi:10.1086/421007 · Cited by 494
Self-citation
Cited by
Three‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Implications for Cosmology
Spergel, D. N., Bean, R., Dore, O., Nolta, M. R., Bennett, C. L., Dunkley, J., Hinshaw, G., Jarosik, N., Komatsu, E., Page, L., et al. (2007) · The Astrophysical Journal Supplement Series · doi:10.1086/513700 · Cited by 6,778
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: COSMOLOGICAL INTERPRETATION
Komatsu, E., Dunkley, J., Nolta, M. R., Bennett, C. L., Gold, B., Hinshaw, G., Jarosik, N., Larson, D., Limon, M., Page, L., et al. (2009) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/180/2/330 · Cited by 5,786
Cosmology and Fundamental Physics with the Euclid Satellite
The Euclid Theory Working Group, Amendola, L., Appleby, S., Bacon, D., Baker, T., Baldi, M., Bartolo, N., Blanchard, A., Bonvin, C., Borgani, S., et al. (2013) · Living Reviews in Relativity · doi:10.12942/lrr-2013-6 · Cited by 899
Schwarz, D. J., Copi, C. J., Huterer, D., & Starkman, G. D. (2016) · Classical and Quantum Gravity · doi:10.1088/0264-9381/33/18/184001 · Cited by 342
Abdalla, E., Abellán, G. F., Aboubrahim, A., Agnello, A., Akarsu, Ö., Akrami, Y., Alestas, G., Aloni, D., Amendola, L., Anchordoqui, L. A., et al. (2022) · Journal of High Energy Astrophysics · doi:10.1016/j.jheap.2022.04.002 · Cited by 37
Metadata
- Authors
- Cruz, M., Martinez-Gonzalez, E., Vielva, P., & Cayon, L.
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2005-01-01
- Volume
- 356
- Issue
- 1
- Pages
- 29-40
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2128088645
- Cited by
- 339
- References
- 32
- FWCI
- 14.38
- Type
- journal article
- Language
- en
- Open access
- green
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