Redshift-space distortions from vector perturbations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00501992" target="_blank" >RIV/68378271:_____/18:00501992 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1475-7516/2018/02/028" target="_blank" >http://dx.doi.org/10.1088/1475-7516/2018/02/028</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2018/02/028" target="_blank" >10.1088/1475-7516/2018/02/028</a>
Alternative languages
Result language
angličtina
Original language name
Redshift-space distortions from vector perturbations
Original language description
We compute a general expression for the contribution of vector perturbations to the redshift-space distortion of galaxy surveys. We show that they contribute to the same multipoles of the correlation function as scalar perturbations and should thus in principle be taken into account in data analysis. We derive constraints for next-generation surveys on the amplitude of two sources of vector perturbations, namely non-linear clustering and topological defects. While topological defects leave a very small imprint on redshift-space distortions, we show that the multipoles of the correlation function are sensitive to vorticity induced by non-linear clustering. Therefore future redshift surveys such as DESI or the SKA should be capable of measuring such vector modes, especially with the hexadecapole which appears to be the most sensitive to the presence of vorticity.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516
e-ISSN
—
Volume of the periodical
2018
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
19
Pages from-to
1-19
UT code for WoS article
000425346400002
EID of the result in the Scopus database
2-s2.0-85043585948