Constraints on non-thermal dark matter from PLANCK lensing extraction

Popa, L.; Vasile, Ana

doi:10.1088/1475-7516/2007/10/017

Cited by 8 publications

(8 citation statements)

References 68 publications

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“…Following the method described in Ref. [61,62], for each frequency channel we consider an homogeneous detector noise with the power spectrum given by: where ν is the frequency of the channel, θ b is the FWHM of the beam and ∆ c are the corresponding sensitivities per pixel of temperature (T) and polarization (P) maps. The global noise of the experiment is obtained as:…”

Section: Discussionmentioning

confidence: 99%

WMAP five-year constraints on lepton asymmetry and radiation energy density: implications for Planck

Popa

Vasile

2008

J. Cosmol. Astropart. Phys.

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Abstract.In this paper we set bounds on the radiation content of the Universe and neutrino properties by using the WMAP-5 year CMB measurements complemented with most of the existing CMB and LSS data (WMAP5+All), imposing also self-consistent BBN constraints on the primordial helium abundance. We consider lepton asymmetric cosmological models parametrized by the neutrino degeneracy parameter ξ ν and the variation of the relativistic degrees of freedom, ∆N oth ef f , due to possible other physical processes occurred between BBN and structure formation epochs.We get a mean value of the effective number of relativistic neutrino species of N ef f = 3.256 +0.607 −0.641 (68% CL), bringing an important improvement over the similar result obtained from WMAP5+BAO+SN+HST data [57]. We also find a strong correlation between Ω m h 2 and z eq , showing that we observe N ef f mainly via the effect of z eq , rather than via neutrino anisotropic stress as claimed by the WMAP team [57].WMAP5+All data provides a strong bound on helium mass fraction of Y p = 0.2486 ± 0.0085 (68% CL), that rivals the bound on Y p obtained from the conservative analysis of the present data on helium abundance.For neutrino degeneracy parameter we find a bound of −0.216 ≤ ξ ν ≤ 0.226 (68%CL), that represent an important improvement over the similar result obtained by using the WMAP 3-year data.The inclusion in the analysis of LSS data reduces the upper limit of the neutrino mass to m ν < 0.419 eV (95% CL) with respect to the values obtained from the analysis from WMAP5-only data [56] and WMAP5+BAO+SN+HST data [57].We forecast that the CMB temperature and polarization measurements observed with high angular resolutions and sensitivities by the future Planck satellite will reduces the errors on ξ ν and Y p down to σ(ξ ν ) ≃ 0.089 (68% CL) and σ(Y p ) = 0.013 (68% CL) respectively, values fully consistent with the BBN bounds on these parameters.This work has been done on behalf of Planck-LFI activities.PACS numbers: CMBR theory, dark matter, cosmological neutrinos, big bang nucleosynthesis WMAP 5-year constraints on lepton asymmetry and radiation energy density: Implications for Planck2

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Section: Discussionmentioning

confidence: 99%

WMAP five-year constraints on lepton asymmetry and radiation energy density: implications for Planck

Popa

Vasile

2008

J. Cosmol. Astropart. Phys.

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“…(A color version of this figure is available in the online journal.) with the power spectrum given by Perotto et al (2006) and Popa & Vasile (2007):…”

Section: The Markov Chain Monte Carlo Methodologymentioning

confidence: 99%

FROMWMAPTOPLANCK: EXACT RECONSTRUCTION OF FOUR- AND FIVE-DIMENSIONAL INFLATIONARY POTENTIAL FROM HIGH-PRECISION COSMIC MICROWAVE BACKGROUND MEASUREMENTS

Popa

Mandolesi

Caramete

et al. 2009

ApJ

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We make a more general determination of the inflationary observables in the standard four-dimensional (4D) and five-dimensional (5D) single-field inflationary scenarios by the exact reconstruction of the dynamics of the inflation potential during the observable inflation with a minimal number of assumptions: the computation does not assume the slow-roll approximation and is valid in all regimes if the field is monotonically rolling down its potential. We address higher order effects in the standard and braneworld single-field inflation scenarios by fitting the Hubbble expansion rate and subsequently the inflationary potential directly to WMAP5+SN+BAO and Planck-like simulated data sets. Making use of the Hamilton-Jacobi formalism developed for the 5D single-field inflation model, we compute the scale dependence of the amplitudes of the scalar and tensor perturbations by integrating the exact mode equation. The solutions in 4D and 5D inflation scenarios differ through the dynamics of the background scalar field and the number of e-folds assumed to be compatible with the observational window of inflation. We analyze the implications of the theoretical uncertainty in the determination of the reheating temperature after inflation on the observable predictions of inflation and evaluate its impact on the degeneracy of the standard inflation consistency relation. We find that the detection of tensor perturbations and the theoretical uncertainties in the inflationary observable represents a significant challenge for the future Planck cosmic microwave background measurements: distinguishing between the observational signatures of the standard and braneworld single-field inflation scenarios. This work has been done in the frame of Planck Core Team activities.

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“…The goal of this paper is to place constraints on RP sterile neutrino parameters in a ΛCWDM model containing a mixture of WDM in the form of RP sterile neutrino and CDM, by using most of the present cosmological measurements. In particular, the reconstructed gravitational lensing potential power spectrum obtained by the Planck satellite has impact on cosmological parameter degeneracies when DM sterile neutrino scenario is considered [63], offering several advantages against other methods [2, 64]. As the gravitational lensing effect depends on the DM distribution in the Universe, no assumption on light-to-mass bias is required.…”

Section: Contentsmentioning

confidence: 99%

“…(2.2), (2.5), (2.6) and (2.9) to obtain the evolution of L να (ǫ res ) in the expanding Universe for the entire range of resonant scaled neutrino momentum values. In this calculation we neglect the effects of the QCD quark-gluon phase transition that may disturb the DM sterile neutrino production rate by the alteration of the time-temperature relationship in the early Universe (due to variation of the statistical weight in different particles) [19,63]. Figure 1 presents the dependence of ǫ res L νe (ǫ res ) on sterile neutrino masses and mixing angles for two different initial lepton numbers, L 4 =12 and 24 (we define L 4 ≡ 10 4 L να ).…”

Section: Lepton Number Depletion and Evolution Of Resonance Energiesmentioning

confidence: 99%

“…In particular, the reconstructed gravitational lensing potential power spectrum obtained by the Planck satellite has impact on cosmological parameter degeneracies when DM sterile neutrino scenario is considered [63], offering several advantages against other methods [2,64]. As the gravitational lensing effect depends on the DM distribution in the Universe, no assumption on light-to-mass bias is required.…”

Section: Jcap09(2015)066mentioning

confidence: 99%

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Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK

Popa¹,

Tonoiu²

2015

J. Cosmol. Astropart. Phys.

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Few independent detections of a weak X-ray line at an energy of ∼3.5 keV seen toward a number of astrophysical sites have been reported. If this signal will be confirmed to be the signature of decaying DM sterile neutrino with a mass of ∼ 7.1 keV, then the cosmological observables should be consistent with its properties. In this paper we make a coupled treatment of the weak decoupling, primordial nucleosynthesis and photon decoupling epochs in the sterile neutrino resonant production scenario, including the extra radiation energy density via N ef f . We compute the radiation and matter perturbations including the full resonance sweep solution for ν α /ν α → ν s flavor conversion in the expanding Universe. We show that the cosmological measurements are in agreement with subdominant Dark Matter sterile neutrino resonant production with following parameters (errors at 95% CL): mass m νs =6.08 ± 3.22 keV, mixing angle sin 2 2θ <5.61 ×10 −10 , lepton number per flavor L 4 = 1.23 ± 0.04 (L 4 ≡ 10 4 L νa ) and sterile neutrino mass fraction f νs < 0.078. Our results are in good agreement with the sterile neutrino resonant production parameters inferred in Ref.[62] from the linear large scale structure constraints to produce full Dark Matter density.

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Constraints on non-thermal dark matter from PLANCK lensing extraction

Cited by 8 publications

References 68 publications

WMAP five-year constraints on lepton asymmetry and radiation energy density: implications for Planck

WMAP five-year constraints on lepton asymmetry and radiation energy density: implications for Planck

FROMWMAPTOPLANCK: EXACT RECONSTRUCTION OF FOUR- AND FIVE-DIMENSIONAL INFLATIONARY POTENTIAL FROM HIGH-PRECISION COSMIC MICROWAVE BACKGROUND MEASUREMENTS

Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK

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