Cosmological constraints from the anisotropic clustering analysis using BOSS DR9

Linder, Eric V.; Oh, Minji; Okumura, Teppei; Sabiu, Cristiano G.; Song, Yong-Seon

doi:10.1103/physrevd.89.063525

Cited by 13 publications

(17 citation statements)

References 63 publications

(74 reference statements)

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“…This work closely follows our approach [13,14] with BOSS DR9 simulation and data, with several improvements arising from both the BOSS data (see [14]) and our analysis. The data covers a wider sky area, much * ysong@kasi.re.kr more uniformly, and the computational simulations for the mock catalogs take into account more instrumental effects.…”

Section: Introductionmentioning

confidence: 91%

“…Improved models were tested using simulations in [13], and applied to DR9 data in [14]. These corrections are briefly reviewed below.…”

Section: A Theoretical Modelmentioning

confidence: 99%

“…Note that we use these mock catalogs solely to estimate errors of the correlation function measured from the CMASS sample. For each realization we compute the correlation function as we did for the observed catalog and obtain a covariance matrix as described in detail in [14].…”

Section: Measurementsmentioning

confidence: 99%

“…Section II summarizes briefly our approach to fitting the clustering correlation function, concentrating on differences from [13,14]. We measure the anisotropic clustering in Section III.…”

Section: Introductionmentioning

confidence: 99%

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Cosmological tests using redshift space clustering in BOSS DR11

Song

Sabiu

Okumura

et al. 2014

J. Cosmol. Astropart. Phys.

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We analyze the clustering of large scale structure in the Universe in a model independent method, accounting for anisotropic effects along and transverse to the line of sight. The Baryon Oscillation Spectroscopy Survey Data Release 11 provides a large sample of 690,000 galaxies, allowing determination of the Hubble expansion H, angular distance DA, and growth rate GΘ at an effective redshift of z = 0.57. After careful bias and convergence studies of the effects from small scale clustering, we find that cutting transverse separations below 40 Mpc/h delivers robust results while smaller scale data leads to a bias due to unmodelled nonlinear and velocity effects. The converged results are in agreement with concordance ΛCDM cosmology, general relativity, and minimal neutrino mass, all within the 68% confidence level. We also present results separately for the northern and southern hemisphere sky, finding a slight tension in the growth rate -potentially a signature of anisotropic stress, or just covariance with small scale velocities -but within 68% CL.PACS numbers: 98.80.-k,95.36.+x

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Section: Introductionmentioning

confidence: 91%

“…Improved models were tested using simulations in [13], and applied to DR9 data in [14]. These corrections are briefly reviewed below.…”

Section: A Theoretical Modelmentioning

confidence: 99%

Section: Measurementsmentioning

confidence: 99%

“…Section II summarizes briefly our approach to fitting the clustering correlation function, concentrating on differences from [13,14]. We measure the anisotropic clustering in Section III.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cosmological tests using redshift space clustering in BOSS DR11

Song

Sabiu

Okumura

et al. 2014

J. Cosmol. Astropart. Phys.

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“…This may be due to the fact that the measured 2DCF appears less noisy that those measured from the mocks (see Fig.1), which reflects a statistical property of the data. Linder et al (2014) presented another independent analysis of DR9 BOSS data, using the method from Song, Okumura, Taruya (2014), which is a similar approach with a different theoretical model. The main difference in methodology is that Linder et al (2014) effectively fixed the shape of P (k), while we marginalize over the shape of P (k) by marginalizing over Ωmh 2 , Ω b h 2 , and ns.…”

Section: Summary and Discussionmentioning

confidence: 99%

Model-independent measurements of cosmic expansion and growth at z = 0.57 using the anisotropic clustering of CMASS galaxies from the Sloan Digital Sky Survey Data Release 9

Wang

2014

Monthly Notices of the Royal Astronomical Society

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We analyze the anisotropic two dimensional galaxy correlation function (2DCF) of the CMASS galaxy samples from the Sloan Digital Sky Survey Data Release 9 (DR9) of the Baryon Oscillation Spectroscopic Survey (BOSS) data. Modeling the 2DCF fully including nonlinear effects and redshift space distortions (RSD) in the scale range of 30 to 120.01 ± 0.23, and f g (0.57)σ 8 (0.57) = 0.474 ± 0.075, where r s (z d ) is the sound horizon at the drag epoch computed using a simple integral, and f g (z) is the growth rate at redshift z, and σ 8 (z) represents the matter power spectrum normalization on 8 h −1 Mpc scale at z. We find that the scales larger than 120 h −1 Mpc are dominated by noise in the 2DCF analysis, and that the inclusion of scales 30-40 h −1 Mpc significantly tightens the RSD measurement. Our measurements are consistent with previous results using the same data, but have significantly better precision since we are using all the information from the 2DCF in the scale range of 30 to 120 h −1 Mpc. Our measurements have been marginalized over sufficiently wide priors for the relevant parameters; they can be combined with other data to probe dark energy and gravity.

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Cosmological implications of different baryon acoustic oscillation data

Wang¹,

Hu²,

Li³

2017

Sci. China Phys. Mech. Astron.

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In this work, we explore the cosmological implications of different baryon acoustic oscillation (BAO) data, including the BAO data extracted by using the spherically averaged one-dimensional galaxy clustering (GC) statistics (hereafter BAO1) and the BAO data obtained by using the anisotropic two-dimensional GC statistics (hereafter BAO2). To make a comparison, we also take into account the case without BAO data (hereafter NO BAO). Firstly, making use of these BAO data, as well as the SNLS3 type Ia supernovae sample and the Planck distance priors data, we give the cosmological constraints of the ΛCDM, the wCDM, and the Chevallier-Polarski-Linder (CPL) model. Then, we discuss the impacts of different BAO data on cosmological consquences, including its effects on parameter space, equation of state (EoS), figure of merit (FoM), decelerationacceleration transition redshift, Hubble parameter H(z), deceleration parameter q(z), statefinder hierarchy S 4 (z) and cosmic age t(z). We find that: (1) NO BAO data always give a smallest fractional matter density Ωm0, a largest fractional curvature density Ω k0 and a largest Hubble constant h; in contrast, BAO1 data always give a largest Ωm0, a smallest Ω k0 and a smallest h. (2) For the wCDM and the CPL model, NO BAO data always give a largest EoS w; in contrast, BAO2 data always give a smallest w. (3) Compared with the case of BAO1, BAO2 data always give a slightly larger FoM, and thus can give a cosmological constraint with a slightly better accuracy. (4) The impacts of different BAO data on the cosmic evolution and the comic age are very small, and can not be distinguished by using various dark energy diagnosis and the cosmic age data.PACS numbers: 98.80.Es, 95.36.+x

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Cosmological constraints from the anisotropic clustering analysis using BOSS DR9

Cited by 13 publications

References 63 publications

Cosmological tests using redshift space clustering in BOSS DR11

Cosmological tests using redshift space clustering in BOSS DR11

Model-independent measurements of cosmic expansion and growth at z = 0.57 using the anisotropic clustering of CMASS galaxies from the Sloan Digital Sky Survey Data Release 9

Cosmological implications of different baryon acoustic oscillation data

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