2015MNRAS.450..288S

Query : 2015MNRAS.450..288S

2015MNRAS.450..288S - Mon. Not. R. Astron. Soc., 450, 288-294 (2015/June-2)

Detection of a supervoid aligned with the cold spot of the cosmic microwave background.

SZAPUDI I., KOVACS A., GRANETT B.R., FREI Z., SILK J., BURGETT W., COLE S., DRAPER P.W., FARROW D.J., KAISER N., MAGNIER E.A., METCALFE N., MORGAN J.S., PRICE P., TONRY J. and WAINSCOAT R.

Abstract (from CDS):

We use the WISE-2MASS infrared galaxy catalogue matched with Pan-STARRS1 (PS1) galaxies to search for a supervoid in the direction of the cosmic microwave background (CMB) cold spot (CS). Our imaging catalogue has median redshift z ≃ 0.14, and we obtain photometric redshifts from PS1 optical colours to create a tomographic map of the galaxy distribution. The radial profile centred on the CS shows a large low-density region, extending over tens of degrees. Motivated by previous CMB results, we test for underdensities within two angular radii, 5°, and 15°. The counts in photometric redshift bins show significantly low densities at high detection significance, ≳ 5σ and ≳ 6σ, respectively, for the two fiducial radii. The line-of-sight position of the deepest region of the void is z ≃ 0.15-0.25. Our data, combined with an earlier measurement by Granett, Szapudi & Neyrinck, are consistent with a large Rvoid = (220±50)h-1Mpc supervoid with δm ≃ -0.14±0.04 centred at z = 0.22±0.03. Such a supervoid, constituting at least a ≃ 3.3σ fluctuation in a Gaussian distribution of the Λ cold dark matter model, is a plausible cause for the CS.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): surveys - cosmic background radiation - cosmology: observations - large-scale structure of Universe

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME the Cold Spot ? 03 13 -20.5           ~ 52 0

Query : 2015MNRAS.450..288S

Basic data :
NAME the Cold Spot -- Object of Unknown Nature
Other object types: otypes_help
ICRS coord. (ep=J2000) : 		03 13 00.0 -20 30 00 [ ] E 2005MNRAS.356...29C
FK4 coord. (ep=B1950 eq=1950) : 		03 10 44.9 -20 41 11 [ ]
Gal coord. (ep=J2000) : 		209.0818 -57.0643 [ ]
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Identifiers (2) :
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NAME the Cold Spot NAME the Spot

References (52 between 1850 and 2026) (Total 52)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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