The Kaiser-Rocket effect: three decades and counting
OA Location
Author(s)
Bahr-Kalus, Benedict
Bertacca, Daniele
Verde, Licia
Heavens, Alan
Type
Journal Article
Abstract
The peculiar motion of the observer, if not accurately accounted for, is bound to induce a well-defined clustering signal in the distribution of galaxies. This signal is related to the Kaiser rocket effect. Here we examine the amplitude and form of this effect, both analytically and numerically, and discuss possible implications for the analysis and interpretation of forthcoming cosmological surveys. For an idealistic cosmic variance dominated full-sky survey with a Gaussian selection function peaked at z ∼ 1.5 it is a > 5σ effect and it can in principle bias very significantly the inference of cosmological parameters, especially for primordial non-Gaussianity. For forthcoming surveys, with realistic masks and selection functions, the Kaiser rocket is not a significant concern for cosmological parameter inference except perhaps for primordial non-Gaussianity studies. However, it is a systematic effect, whose origin, nature and imprint on galaxy maps are well known and thus should be subtracted or mitigated. We present several approaches to do so.
Date Issued
2021-11-01
Date Acceptance
2021-10-15
Citation
Journal of Cosmology and Astroparticle Physics, 2021, 2021 (11), pp.1-41
ISSN
1475-7516
Publisher
IOP Publishing
Start Page
1
End Page
41
Journal / Book Title
Journal of Cosmology and Astroparticle Physics
Volume
2021
Issue
11
Copyright Statement
© 2021 IOP Publishing Ltd and Sissa Medialab
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000727716400008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Particles & Fields
Physics
cosmological parameters from LSS
power spectrum
inflation
PRIMORDIAL NON-GAUSSIANITY
POWER-SPECTRUM
DIPOLE ANISOTROPY
REDSHIFT SURVEY
DARK ENERGY
LOCAL GROUP
DENSITY
GALAXIES
SPACE
INFERENCE
Publication Status
Published
Article Number
ARTN 027
Date Publish Online
2021-11-11