The Homogeneity Scale of the universe

Ntelis, Pierros

The Homogeneity Scale of the universe

Pierros Ntelis

Jul 12, 2016

5 pages

e-Print:

1607.03418 [astro-ph.CO]

View in:

ADS Abstract Service

pdf

reference search8 citations

Citations per year

Abstract: (arXiv)

In this study, we probe the cosmic homogeneity with the BOSS CMASS galaxy sample in the redshift region of

0.43 < z < 0.7

. We use the normalised counts-in-spheres estimator

\mathcal{N}(<r)

and the fractal correlation dimension

\mathcal{D}_{2}(r)

to assess the homogeneity scale of the universe. We verify that the universe becomes homogenous on scales greater than

\mathcal{R}_{H} \simeq 64.3\pm1.6\ h^{-1}Mpc

, consolidating the Cosmological Principle with a consistency test of

\Lambda

CDM model at the percentage level. Finally, we explore the evolution of the homogeneity scale in redshift.

Note:

5 pages, 2 figures, Talk presented at The 51th Rencontres de Moriond, March 19-26, 2016, La Thuile, Italy; to appear in the Moriond Conference Proceedings

References(15)

Figures(6)

[1]

George FR Ellis. Cosmology and verifiability

- Q.J.Roy.Astron.Soc. 16 (1975) 245-264

[2]

The Cosmic Microwave Background spectrum from the full COBE FIRAS data set

et al.

- Astrophys.J. 473 (1996) 576
•
e-Print:
- astro-ph/9605054
•
DOI:
- 10.1086/178173

[3]

The 2-10 kev xrb dipole and its cosmological implications

et al.

- Astrophys.J. 544 (2000) 49
•
e-Print:
- astro-ph/9908187
•
DOI:
- 10.1086/317174

[4]

Detection of the velocity dipole in the radio galaxies of the nrao vla sky survey

- Nature 416 (2002) 150-152
•
e-Print:
- astro-ph/0203385
•
DOI:
- 10.1038/416150a

[5]

What have we learned from observational cosmology? Studies in History and Philosophy of Science Part B : Studies in History and Philosophy of Modern

J-Ch Hamilton

- Physics 46 (2014) 70-85

[6]

Planck 2015 results. I. Overview of products and scientific results

Planck

Collaboration

•

R. Adam
(
- LPSC, Grenoble
)

et al.

- Astron.Astrophys. 594 (2016) A1
•
e-Print:
- 1502.01582
•
DOI:
- 10.1051/0004-6361/201527101

[7]

The 2.5 m Telescope of the Sloan Digital Sky Survey

SDSS

Collaboration

•

James E. Gunn
(
- Princeton U.
)

et al.

- Astron.J. 131 (2006) 2332-2359
•
e-Print:
- astro-ph/0602326
•
DOI:
- 10.1086/500975

[8]

The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

BOSS

Collaboration

•

Shadab Alam
(
- Carnegie Mellon U.
)

et al.

- Astrophys.J.Suppl. 219 (2015) 1, 12
•
e-Print:
- 1501.00963
•
DOI:
- 10.1088/0067-0049/219/1/12

[9]

The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey

BOSS

Collaboration

•

Stephen Smee

et al.

- Astron.J. 146 (2013) 32
•
e-Print:
- 1208.2233
•
DOI:
- 10.1088/0004-6256/146/2/32

[10]

SDSS-III Baryon Oscillation Spectroscopic Survey Data Release 12: galaxy target selection and large scale structure catalogues

BOSS

Collaboration

•

Beth Reid

et al.

- Mon.Not.Roy.Astron.Soc. 455 (2016) 2, 1553-1573
•
e-Print:
- 1509.06529
•
DOI:
- 10.1093/mnras/stv2382

[11]

Claudia Strömbäck, Daniel Thomas, DA Wake, and RC Nichol. Modelling the colour evolution of luminous red galaxies-improvements with empirical stellar spectra. Monthly Notices of the Royal Astronomical Society: Letters, 394(1):L107-L111

G. Maraston

[12]

The WiggleZ Dark Energy Survey: the transition to large-scale cosmic homogeneity

et al.

- Mon.Not.Roy.Astron.Soc. 425 (2012) 116-134
•
e-Print:
- 1205.6812
•
DOI:
- 10.1111/j.1365-2966.2012.21402.x

[13]

The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes

- JCAP 07 (2011) 034
•
e-Print:
- 1104.2933
•
DOI:
- 10.1088/1475-7516/2011/07/034

[14]

Mock galaxy catalogues using the quick particle mesh method

- Mon.Not.Roy.Astron.Soc. 437 (2014) 3, 2594-2606
•
e-Print:
- 1309.5532
•
DOI:
- 10.1093/mnras/stt2071

[15]

P. Ntelis, J.C. Hamilton Exploring cosmic homogeneity with the boss dr12 galaxy sample. to be published

J.M. LeGoff P. Laurent E. Burtin