Large-scale periodicity in the distribution of QSO absorption-line systems

Ryabinkov, A. I.; Kaminker, A. D.

doi:10.1007/s10509-010-0448-1

Cited by 3 publications

(10 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These scales are in agreement also with a period of (108 ± 6) h −1 Mpc revealed by Ryabinkov & Kaminker (2011) in the radial distribution of QSO ALSs for a wider redshift interval 0.0 ≤ z ≤ 4.3. Note that the nearness of the periods ∼ 100h −1 Mpc revealed at redshifts z < ∼ 0.5 for LRGs and at z ≤ 4.3 for QSO ALSs argues for spreading of the same large-scale periodicity over long interval of the cosmological evolution (see also Demiański et al 2011).…”

Section: Conclusion and Discussionsupporting

confidence: 90%

“…3, 5 and their variations from sample to sample probably evidence in favour of rather spatial than temporal nature of the quasi-periodicities discussed here. Our model simulations performed for partly ordered structures of points (e.g., Ryabinkov & Kaminker 2011) show that it is possible to get a point-like power spectra similar to those represented in Figs. 3 and 5 performing simulations of a cloud-like 3D-distribution of points around vertices, e.g.…”

Section: Conclusion and Discussionsupporting

confidence: 56%

“…A part of data displayed in Fig. 7 is taken from Table 1 of Ryabinkov & Kaminker (2011). Additional segments of scales are introduced with using results of Hütsi (2006) on the BAO incorporated in the power spectrum of the SDSS DR4 LRG sample, and Percival et al (2010) on the disclosure of the BAO in the power spectra of both SDSS DR7 samples: LRGs and MGS, with inclusion of 2dF Galaxy Redshift Survey data.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…Three significant periods, (127 ± 21) h −1 Mpc, (73.4 ± 5.8) h −1 Mpc, and (31.7 ± 1.8) h −1 Mpc, were revealed by Hartnett & Hirano (2008) in their Fourier analysis of radial galaxy distribution on the basis of SDSS DR5 and 2dF GRS data. The periodicity found by Ryabinkov & Kaminker (2011) in the radial distribution of QSO ALSs is also included.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…On the other hand, Ryabinkov & Kaminker (2011) have shown that the radial (line-of-sight) comoving distribution of absorption-line systems (ALSs) registered in quasar (QSO) spectra within the interval z = 0.0 − 4.3 reveals a period of (108 ± 6) h −1 Mpc or (alternatively) a temporal interval (350 ± 20) h −1 Myr for the standard cosmological model. The proximity of the scales obtained for the spatial LRG distribution, e.g.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Quasi-periodical features in the distribution of Luminous Red Galaxies

Ryabinkov¹,

Kaurov

Kaminker

2012

Astrophys Space Sci

Self Cite

View full text Add to dashboard Cite

A statistical analysis of radial distributions of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS DR7) catalogue within an interval 0.16 ≤ z ≤ 0.47 is carried out. We found that the radial distribution of ∼ 106,000 LRGs incorporates a few quasi-periodical components relatively to a variable η, dimensionless line-of-sight comoving distance calculated for the ΛCDM cosmological model. The most significant peaks of the power spectra are obtained for two close periodicities corresponding to the spatial comoving scales (135 ± 12) h −1 Mpc and (101±6) h −1 Mpc. The latter one is dominant and consistent with the characteristic scale of the baryon acoustic oscillations. We analyse also the radial distributions of two other selected LRG samples: ∼ 33, 400 bright LRGs (−23.2 < M ≤ −21.8) and ∼ 60, 300 all LRGs within a rectangle region on the sky, and show differences of the quasi-periodical features characteristic for different samples. Being confirmed the results would allow to give preference of the spatial against temporal models which could explain the quasi-periodicities discussed here. As a caveat we show that estimations of the significance levels of the peaks strongly depend on a smoothed radial function (trend) as well as characteristics of random fluctuations.

show abstract

Section: Conclusion and Discussionsupporting

confidence: 90%

Section: Conclusion and Discussionsupporting

confidence: 56%

Section: Conclusion and Discussionmentioning

confidence: 99%

Section: Conclusion and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quasi-periodical features in the distribution of Luminous Red Galaxies

Ryabinkov¹,

Kaurov

Kaminker

2012

Astrophys Space Sci

Self Cite

View full text Add to dashboard Cite

show abstract

Quasi-periodical components in the radial distributions of cosmologically remote objects

Ryabinkov¹,

Kaminker

2014

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

A statistical analysis of radial (line-of-sight) 1D-distributions of brightest cluster galaxies (BCGs) within the redshift interval 0.044 z 0.78 and Mg II absorption-line systems (0.37 z 2.28) is carried out. Power spectra and two-point radial correlation functions are calculated. It is found that both radial distributions of spectroscopic redshifts of 52,683 BCGs and 32,840 Mg II absorption systems incorporate similar quasi-periodical components relatively to the comoving distance. Significance of the components exceeds 4σ-level and admits an increase ( > ∼ 5σ) for some broad subsamples. For the ΛCDM cosmological model the periodicities correspond to spatial comoving scales (98±3) and (101±2) h −1 Mpc, respectively. These quasi-periods turn out to be close to the characteristic scale (101±6) h −1 Mpc of the quasi-periodical component obtained earlier for the radial distribution of luminous red galaxies (LRGs). On the other hand, the scales are close to the spatial scale corresponding to the baryon acoustic oscillations (BAOs) revealed by many authors at the last decade. Fourier transform phases obtained for the BCGs and LRGs are found to be close, while the phases calculated for the Mg II absorption systems and LRGs are opposite. Discussions of the results in a context of the BAO and large-scale structure characteristic scales are outlined.

show abstract

Observational tests for oscillating expansion rate of the Universe

Hirano

Komiya

2010

Phys. Rev. D

View full text Add to dashboard Cite

We investigate the observational constraints on the oscillating scalar field model using data from type Ia supernovae, cosmic microwave background anisotropies, and baryon acoustic oscillations. According to a Fourier analysis, the galaxy number count $N$ from redshift $z$ data indicates that galaxies have preferred periodic redshift spacings. We fix the mass of the scalar field as $m_\phi=3.2\times 10^{-31}h$ ${\rm eV}$ such that the scalar field model can account for the redshift spacings, and we constrain the other basic parameters by comparing the model with accurate observational data. We obtain the following constraints: $\Omega_{m,0}=0.28\pm 0.03$ (95% C.L.), $\Omega_{\phi,0} < 0.035$ (95% C.L.), $\xi > -158$ (95% C.L.) (in the range $\xi \le 0$). The best fit values of the energy density parameter of the scalar field and the coupling constant are $\Omega_{\phi,0}= 0.01$ and $\xi= -25$, respectively. The value of $\Omega_{\phi,0}$ is close to but not equal to $0$. Hence, in the scalar field model, the amplitude of the galaxy number count cannot be large. However, because the best fit values of $\Omega_{\phi,0}$ and $\xi$ are not $0$, the scalar field model has the possibility of accounting for the periodic structure in the $N$--$z$ relation of galaxies. The variation of the effective gravitational constant in the scalar field model is not inconsistent with the bound from observation.Comment: 9 pages, 11 figures, 1 table, Accepted for publication in Physical Review

show abstract

Large-scale periodicity in the distribution of QSO absorption-line systems

Cited by 3 publications

References 49 publications

Quasi-periodical features in the distribution of Luminous Red Galaxies

Quasi-periodical features in the distribution of Luminous Red Galaxies

Quasi-periodical components in the radial distributions of cosmologically remote objects

Observational tests for oscillating expansion rate of the Universe

Contact Info

Product

Resources

About