Probing cosmic isotropy with a new X-ray galaxy cluster sample through the LX–T scaling relation

K. Migkas; G. Schellenberger; T. H. Reiprich; F. Pacaud; M. E. Ramos-Ceja; L. Lovisari

doi:10.1051/0004-6361/201936602

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Volume 636 (April 2020)

A&A, 636 (2020) A15

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Table 2.

Directions of the most statistically significant lowest and highest A and H₀ sky regions are displayed together with their statistical deviation from one another.

Clusters (θ)	Lowest A/H₀ (l, b)	Highest A/H₀ (l, b)	Anisotropy significance	Max. dipole (l, b)	Dipole significance
		Our sample
All (90°)	(272°, −8°)	(47°, + 22°)	2.59σ	(230°, −20°)	1.90σ
All (75°)	(274°, −22°)	(17°, −9°)	3.64σ	(263°, −21°)	3.21σ
All (60°)	(281°, −16°)	(34°, + 4°)	4.73σ	(260°, −36°)	3.77σ
All (45°)	(280°, + 1°)	(32°, + 14°)	5.09σ	(255°, −53°)	4.22σ

All (75°, varying B – Case 1)	(272°, −21°)	(26°, −13°)	3.74σ	(262°, −21°)	3.29σ
All (75°, varying B – Case 2)	(269°, −17°)	(23°, −10°)	2.78σ	(262°, −22°)	2.36σ

T > 2.5 keV, z > 0.03 (75°)	(288°, −35°)	(10°, + 16°)	4.68σ	(194°, −34°)	3.27σ
T > 3 keV, z > 0.05 (75°)	(286°, −36°)	(9°, + 15°)	4.12σ	(223°, −47°)	2.27σ
Z_core ≤ 0.59 Z_⊙ (75°)	(264°, −18°)	(30°, + 23°)	3.63σ	(261°, −20°)	3.41σ
Z_out ≤ 0.426 Z_⊙ (75°)	(270°, −14°)	(24°, + 15°)	3.72σ	(265°, −16°)	2.26σ
N_Htot ≤ 5.16 × 10²⁰ cm⁻² (75°)	(242°, −27°)	(35°, −15°)	5.39σ	(221°, −33°)	3.55σ

		Other samples
ACC (75°)	(314°, −17°)	(77°, + 15°)	4.18σ	(327°, −21°)	3.68σ
XCS-DR1 (75°)	(281°, + 24°)	(31°, + 25°)	4.52σ	(211°, + 14°)	2.75σ

Our sample + ACC + XCS (75°)	(303°, −27°)	(34°, + 26°)	5.59σ	(265°, −20°)	4.06σ
Same (varying B – Case 1)	(312°, −21°)	(45°, + 21°)	4.55σ	(271°, −15°)	3.32σ

Notes. Additionally, the direction and statistical significance of the most anisotropic dipole is displayed. The results are shown for the same subsamples as in Table 1. For the results labeled as “Case 1” and “Case 2” see Sect. 6.5.

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