Dark matter component decaying after recombination

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Dark matter component decaying after recombination : Sensitivity to baryon acoustic oscillation and redshift space distortion probes. / Chudaykin, A.; Gorbunov, D.; Tkachev, I.

In: Physical Review D, Vol. 97, No. 8, 083508, 09.04.2018.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{d92e0f9830e2400e9f6fd923cd581eb0,

title = "Dark matter component decaying after recombination: Sensitivity to baryon acoustic oscillation and redshift space distortion probes",

abstract = "It has been recently suggested [1] that a subdominant fraction of dark matter decaying after recombination may alleviate tension between high-redshift (CMB anisotropy) and low-redshift (Hubble constant, cluster counts) measurements. In this report, we continue our previous study [2] of the decaying dark matter (DDM) model adding all available recent baryon acoustic oscillation (BAO) and redshift space distortions (RSD) measurements. We find that the BAO/RSD measurements generically prefer the standard ΛCDM and combined with other cosmological measurements impose an upper limit on the DDM fraction at the level of ∼5%, strengthening by a factor of 1.5 limits obtained in [2] mostly from CMB data. However, the numbers vary from one analysis to other based on the same Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) galaxy sample. Overall, the model with a few percent DDM fraction provides a better fit to the combined cosmological data as compared to the ΛCDM: the cluster counting and direct measurements of the Hubble parameter are responsible for that. The improvement can be as large as 1.5σ and grows to 3.3σ when the CMB lensing power amplitude AL is introduced as a free fitting parameter.",

keywords = "GALAXIES, UNIVERSE, SAMPLE",

author = "A. Chudaykin and D. Gorbunov and I. Tkachev",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = apr,

day = "9",

doi = "10.1103/PhysRevD.97.083508",

language = "English",

volume = "97",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "8",

}

RIS

TY - JOUR

T1 - Dark matter component decaying after recombination

T2 - Sensitivity to baryon acoustic oscillation and redshift space distortion probes

AU - Chudaykin, A.

AU - Gorbunov, D.

AU - Tkachev, I.

PY - 2018/4/9

Y1 - 2018/4/9

N2 - It has been recently suggested [1] that a subdominant fraction of dark matter decaying after recombination may alleviate tension between high-redshift (CMB anisotropy) and low-redshift (Hubble constant, cluster counts) measurements. In this report, we continue our previous study [2] of the decaying dark matter (DDM) model adding all available recent baryon acoustic oscillation (BAO) and redshift space distortions (RSD) measurements. We find that the BAO/RSD measurements generically prefer the standard ΛCDM and combined with other cosmological measurements impose an upper limit on the DDM fraction at the level of ∼5%, strengthening by a factor of 1.5 limits obtained in [2] mostly from CMB data. However, the numbers vary from one analysis to other based on the same Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) galaxy sample. Overall, the model with a few percent DDM fraction provides a better fit to the combined cosmological data as compared to the ΛCDM: the cluster counting and direct measurements of the Hubble parameter are responsible for that. The improvement can be as large as 1.5σ and grows to 3.3σ when the CMB lensing power amplitude AL is introduced as a free fitting parameter.

AB - It has been recently suggested [1] that a subdominant fraction of dark matter decaying after recombination may alleviate tension between high-redshift (CMB anisotropy) and low-redshift (Hubble constant, cluster counts) measurements. In this report, we continue our previous study [2] of the decaying dark matter (DDM) model adding all available recent baryon acoustic oscillation (BAO) and redshift space distortions (RSD) measurements. We find that the BAO/RSD measurements generically prefer the standard ΛCDM and combined with other cosmological measurements impose an upper limit on the DDM fraction at the level of ∼5%, strengthening by a factor of 1.5 limits obtained in [2] mostly from CMB data. However, the numbers vary from one analysis to other based on the same Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) galaxy sample. Overall, the model with a few percent DDM fraction provides a better fit to the combined cosmological data as compared to the ΛCDM: the cluster counting and direct measurements of the Hubble parameter are responsible for that. The improvement can be as large as 1.5σ and grows to 3.3σ when the CMB lensing power amplitude AL is introduced as a free fitting parameter.

KW - GALAXIES

KW - UNIVERSE

KW - SAMPLE

UR - http://www.scopus.com/inward/record.url?scp=85047160087&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.97.083508

DO - 10.1103/PhysRevD.97.083508

M3 - Article

AN - SCOPUS:85047160087

VL - 97

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 8

M1 - 083508

ER -

ID: 13489212

Dark matter component decaying after recombination: Sensitivity to baryon acoustic oscillation and redshift space distortion probes

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