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Non-circular rotating beams and CMB experiments

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Non-circular rotating beams and CMB experiments

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dc.contributor.author Arnau Córdoba, José Vicente
dc.contributor.author Aliaga, A.M.
dc.contributor.author Saez, D.
dc.date.accessioned 2010-06-18T08:01:04Z
dc.date.available 2010-06-18T08:01:04Z
dc.date.issued 2002
dc.identifier.citation ARNAU CORDOBA, Jose Vicente ; Aliaga, A.M. ; Saez Milan, Diego Pascual, 2002, Non-circular rotating beams and CMB experiments, Astronomy and Astrophysics, vol. 382, no. 3, p. 1138-1150 en
dc.identifier.uri http://hdl.handle.net/10550/12984
dc.description.abstract This paper is concerned with small angular scale experiments for the observation of cosmic microwave background anisotropies. In the absence of beam, the effects of partial coverage and pixelisation are disentangled and analyzed (using simulations). Then, appropriate maps involving the CMB signal plus the synchrotron and dust emissions from the Milky Way are simulated, and an asymmetric beam - which turns following di erent strategies - is used to smooth the simulated maps. An associated circular beam is defined to estimate the deviations in the angular power spectrum produced by beam asymmetry without rotation and, afterwards, the deviations due to beam rotation are calculated. For a certain large coverage, the desviations due to pure asymmetry and asymmetry plus rotation appear to be very systematic (very similar in each simulation). Possible applications of the main results of this paper to data analysis in large coverage experiments - as PLANCK - are outlined. en
dc.language.iso en en
dc.subject Cosmic microwave background ; Cosmology theory ; Large-scale structure of the universe ; Numerical method ; Data analysis method en
dc.title Non-circular rotating beams and CMB experiments en
dc.type journal article es_ES
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia en
dc.identifier.doi 10.1051/0004-6361:20011681 en
dc.identifier.idgrec 000850 en
dc.type.hasVersion VoR es_ES
dc.identifier.url http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2002/06/aah3089.pdf en

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