A dark matter component decaying after recombination: lensing constraints with Planck data

A dark matter component decaying after recombination: lensing constraints with Planck data

It was recently proposed [1] that the model with a fraction of decaying cold dark matter is able to reconcile measurements in high redshift (CMB) and low redshift (probes of cluster abundance and the Hubble constant). We check this statement employing the full likelihood of CMB Planck data. We find...

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Main Authors: Chudaykin Anton, Gorbunov Dmitry, Tkachev Igor
Format: Article
Language:English
Published: EDP Sciences 2016-01-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/201612503004
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spelling doaj-5195d2805e99414d9cb8360eec23d6fa2021-08-02T09:18:38ZengEDP SciencesEPJ Web of Conferences2100-014X2016-01-011250300410.1051/epjconf/201612503004epjconf_quark2016_03004A dark matter component decaying after recombination: lensing constraints with Planck dataChudaykin AntonGorbunov DmitryTkachev IgorIt was recently proposed [1] that the model with a fraction of decaying cold dark matter is able to reconcile measurements in high redshift (CMB) and low redshift (probes of cluster abundance and the Hubble constant). We check this statement employing the full likelihood of CMB Planck data. We find that the lensing effect calculated from anisotropy spectra measured by Planck imposes the strong constraint on the fraction of unstable dark matter as F < 8% (2σ). However, combining the CMB data with conflicting measurements in low redshift we obtain that the model with F ≈ 2 − 5% improves the goodness-of-fit by 1.5 − 2σ depending on As and τ priors in comparison with the concordance ΛCDM model.http://dx.doi.org/10.1051/epjconf/201612503004
collection DOAJ
language English
format Article
sources DOAJ
author Chudaykin Anton
Gorbunov Dmitry
Tkachev Igor
spellingShingle Chudaykin Anton
Gorbunov Dmitry
Tkachev Igor
A dark matter component decaying after recombination: lensing constraints with Planck data
EPJ Web of Conferences
author_facet Chudaykin Anton
Gorbunov Dmitry
Tkachev Igor
author_sort Chudaykin Anton
title A dark matter component decaying after recombination: lensing constraints with Planck data
title_short A dark matter component decaying after recombination: lensing constraints with Planck data
title_full A dark matter component decaying after recombination: lensing constraints with Planck data
title_fullStr A dark matter component decaying after recombination: lensing constraints with Planck data
title_full_unstemmed A dark matter component decaying after recombination: lensing constraints with Planck data
title_sort dark matter component decaying after recombination: lensing constraints with planck data
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2016-01-01
description It was recently proposed [1] that the model with a fraction of decaying cold dark matter is able to reconcile measurements in high redshift (CMB) and low redshift (probes of cluster abundance and the Hubble constant). We check this statement employing the full likelihood of CMB Planck data. We find that the lensing effect calculated from anisotropy spectra measured by Planck imposes the strong constraint on the fraction of unstable dark matter as F < 8% (2σ). However, combining the CMB data with conflicting measurements in low redshift we obtain that the model with F ≈ 2 − 5% improves the goodness-of-fit by 1.5 − 2σ depending on As and τ priors in comparison with the concordance ΛCDM model.
url http://dx.doi.org/10.1051/epjconf/201612503004
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AT tkachevigor adarkmattercomponentdecayingafterrecombinationlensingconstraintswithplanckdata
AT chudaykinanton darkmattercomponentdecayingafterrecombinationlensingconstraintswithplanckdata
AT gorbunovdmitry darkmattercomponentdecayingafterrecombinationlensingconstraintswithplanckdata
AT tkachevigor darkmattercomponentdecayingafterrecombinationlensingconstraintswithplanckdata
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