Improved method for detecting local discontinuities in CMB data by finite differencing

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.023503· OSTI ID:21513063

Bowyer, Jude; Jaffe, Andrew H ^[1]

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1. Astrophysics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2BZ (United Kingdom)

An unexpected distribution of temperatures in the CMB could be a sign of new physics. In particular, the existence of cosmic defects could be indicated by temperature discontinuities via the Kaiser-Stebbins effect. In this paper, we show how performing finite differences on a CMB map, with the noise regularized in harmonic space, may expose such discontinuities, and we report the results of this process on the 7-year Wilkinson Microwave Anisotropy Probe data.

• OSTI ID: 21513063
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevD.83.023503; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ANISOTROPY
DATA ANALYSIS
DISTRIBUTION
MICROWAVE RADIATION
NOISE
RELICT RADIATION
SPACE
TEMPERATURE DISTRIBUTION
ELECTROMAGNETIC RADIATION
RADIATIONS