2022
DOI: 10.1088/1475-7516/2022/06/006
|View full text |Cite
|
Sign up to set email alerts
|

Isotropy statistics of CMB hot and cold spots

Abstract: Statistical Isotropy of the Cosmic Microwave Background (CMB) radiation has been studied and debated extensively in recent years. Under this assumption, the hot spots and cold spots of the CMB are expected to be uniformly distributed over a 2-sphere. We use the orientation matrix, first proposed by Watson (1965) and Scheidegger (1965) and associated shape and strength parameters (Woodcock, 1977) to analyse whether the hot and cold spots of the observed CMB temperature anisotropy field are uniformly placed. We … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1

Citation Types

0
2
0

Year Published

2022
2022
2023
2023

Publication Types

Select...
6

Relationship

1
5

Authors

Journals

citations
Cited by 7 publications
(2 citation statements)
references
References 84 publications
0
2
0
Order By: Relevance
“…The most accurate current measurements of the CMB temperature fluctuations are part of the third public data release of the Planck collaboration [48], precise data that allow to re-examine many interesting features already reported with diverse CMB data sets [2,[18][19][20][21][22][23][24][25][26][27][28][29][30]51]. Further, CMB products combined with data sets from other cosmological tracers are being used to study models alternative to the flat-ΛCDM model (see, e.g.…”
Section: Datamentioning
confidence: 99%
“…The most accurate current measurements of the CMB temperature fluctuations are part of the third public data release of the Planck collaboration [48], precise data that allow to re-examine many interesting features already reported with diverse CMB data sets [2,[18][19][20][21][22][23][24][25][26][27][28][29][30]51]. Further, CMB products combined with data sets from other cosmological tracers are being used to study models alternative to the flat-ΛCDM model (see, e.g.…”
Section: Datamentioning
confidence: 99%
“…The low CMB variance anomaly was seen to vanish when the quadrupole and octupole were excluded from the CMB maps under investigation (Cruz et al 2011). Using novel statistics to measure the strength and shape of distribution of CMB local extrema, Khan & Saha (2022b) found a strikingly weak nonuniformity in the distribution of hot and cold spots on the CMB, which is due to the low CMB temperature variance and anomalous contributions of the quadrupole and octupole.…”
Section: Introductionmentioning
confidence: 97%