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Verfasst von:Amendola, Luca [VerfasserIn]   i
Titel:Measuring our peculiar velocity on the CMB with high-multipole off-diagonal correlations
Verf.angabe:Luca Amendola, Riccardo Catena, Isabella Masina, Alessio Notari, Miguel Quartin and Claudia Quercellini
E-Jahr:2011
Jahr:19 July 2011
Umfang:26 S.
Fussnoten:Gesehen am 13.11.2017
Titel Quelle:Enthalten in: Journal of cosmology and astroparticle physics
Ort Quelle:London : IOP, 2003
Jahr Quelle:2011
Band/Heft Quelle:(2011), 7, Artikel-ID 027, Seite 1-26
ISSN Quelle:1475-7516
Abstract:Our peculiar velocity with respect to the CMB rest frame is known to induce a large dipole in the CMB. However, the motion of an observer has also the effect of distorting the anisotropies at all scales, as shown by Challinor and Van Leeuwen (2002), due to aberration and Doppler effects. We propose to measure independently our local motion by using off-diagonal two-point correlation functions for high multipoles. We study the observability of the signal for temperature and polarization anisotropies. We point out that Planck can measure the velocity β with an error of about 30% and the direction with an error of about 20°. This method constitutes a cross-check, which can be useful to verify that our CMB dipole is due mainly to our velocity or to disentangle the velocity from other possible intrinsic sources. Although in this paper we focus on our peculiar velocity, a similar effect would result also from other intrinsic vectorial distortion of the CMB which would induce a dipolar lensing. Measuring the off-diagonal correlation terms is therefore a test for a preferred direction on the CMB sky.
DOI:doi:10.1088/1475-7516/2011/07/027
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: http://dx.doi.org/10.1088/1475-7516/2011/07/027
 DOI: https://doi.org/10.1088/1475-7516/2011/07/027
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1565263936
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