Speaker
SANJEEV SANYAL
(INDIAN INSTITUTE OF TECHNOLOGY (BHU), VARANASI, INDIA.)
Description
In this work we present our analysis of one of the prominent "anomalies" of CMB sky, the "hemispherical power asymmetry (HPA)", from the latest fullsky CMB maps from Planck satellite mission's Public Release 4. The data is analyzed from various perspectives to understand the nature of HPA better viz., a re-estimation of the magnitude and direction of HPA and the corresponding significance, consistency of the recovered amplitude and direction. We do so using the Local variance estimator (LVE) method. We find that the CMB hemispherical power asymmetry, phenomenologically modeled as a dipole modulation of an otherwise statistically isotropic CMB sky, is robust against all these tests and appears indeed to be a cosmic signal.
| Track type | CMBR |
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Author
SANJEEV SANYAL
(INDIAN INSTITUTE OF TECHNOLOGY (BHU), VARANASI, INDIA.)
Co-author
Dr
Pavan Kumar Aluri
(INDIAN INSTITUTE OF TECHNOLOGY (BHU), VARANASI, INDIA.)
