@article{10902/27480,
year = {2010},
url = {https://hdl.handle.net/10902/27480},
abstract = {We report the detection of a high Galactic latitude, large-scale, 7? signal in Wilkinson Microwave Anisotropy Probe (WMAP) 5-year data and spatially correlated with the ecliptic plane. Two possible candidates are studied, namely unresolved sources and Zodiacal light emission. We determine the strength of the Zodiacal light emission at WMAP frequencies and estimate the contribution from unresolved extragalactic sources. Neither the standard Zodiacal light emission nor the unresolved sources alone seem to be able to explain the observed signal. Other possible interpretations such as Galactic foregrounds and diffuse Sunyaev?Zel?dovich effect also seem unlikely. We check if our findings could affect the low-  anomalies which have been reported in the WMAP data. Neither Zodiacal light emission nor unresolved point-source residuals seem to affect significantly the quadrupole and octupole measurements. However, a signal with a quasi-blackbody spectrum and with a spatial distribution similar to the Zodiacal light emission could explain both the anomalous signal and the low-  anomalies. Future data (Planck) will be needed in order to explain the origin of this signal.},
organization = {The authors would like to thank Richard Lieu, Bizhu Jiang, Hiranya Peiris and Andrew Pontzen for interesting discussion and comments. JMD benefits from a Ministerio de Educacion y Ciencia ´ “Ramon y Cajal” contract. JMD and MC also acknowledge support ´ from the Ministerio de Educacion y Ciencia project AYA2007- ´ 68058-C03-02. YA acknowledges support from the Ministerio de Educacion y Ciencia project AYA2007-67965-C03-03. Partial fi- ´ nancial support for this research has been provided to JGN, MM and CB by the Italian ASI (contracts Planck LFI Activity of Phase E2 and de ASI contract I/016/07/0 COFIS) and MUR. Some of the results in this paper have been derived using the HEALPIX (Gorski et al. 2005) package. We would like to thank the WMAP team for making the data available to the community.},
publisher = {Oxford University Press},
publisher = {Monthly Notices of the Royal Astronomical Society, 2010, 402(2), 1213-1220},
title = {An anomalous Wilkinson Microwave Anisotropy Probe signal in the ecliptic plane},
author = {Diego Rodríguez, José María and Cruz Rodríguez, Marcos and Gonzalez-Nuevo, j. and Maris, M. and Ascasibar, Y. and Burigana, C.},
}