29 citations · 125 across the 12 of their papers we have counts for
12 papers
The polarization quaternion and its applications: a joint representation of the Q/U Stokes parameters and E/B mode polarizations
Hao Liu, James Creswell, Chao-Wei Tsai +1
In this work, we point out that the Q/U Stokes parameters and E/B mode polarizations are the four components of a unique quaternion, which describes at the same time the directions…
Ring of attraction: overlapping directions of the dipole modulation of the CMB, the parity asymmetry, and kinematic dipole percolation zone
James Creswell, Pavel Naselsky
The largest anisotropy in the cosmic microwave background (CMB) is the 3 mK kinematic dipole reflecting our motion with respect to the CMB frame and pointed in the direction $(l, b…
Asymmetry of the CMB map: local and global anomalies
James Creswell, Pavel Naselsky
We investigate the sources of parity asymmetry in the CMB temperature maps using a pixel domain approach. We demonstrate that this anomaly is mainly associated with the presence of…
Statistics of non-polarized points in the CMB polarization maps
Jaan Kasak, James Creswell, Hao Liu +1
The non-polarized points (NPP) of the and Stokes parameters of the CMB can be classified according to the geometry of the polarization field. We describe a procedure to ide…
Comparison of the Planck 2018 CMB polarization maps in the BICEP2/Keck region
Hao Liu, James Creswell, Pavel Naselsky
We examine the statistical properties of polarization maps from Planck 2018 within the patch of sky observed by the BICEP2/Keck experiment using the one point distribution function…
Statistics of CMB polarization angles
James Creswell, Nadia Dachlythra, Hao Liu +2
We study the distribution functions of the CMB polarization angle , focusing on the Planck 2018 CMB maps. We extend the model of Preece & Battye (2014) of Gaussian correlated $Q…
Blind correction of the EB-leakage in the pixel domain
Hao Liu, James Creswell, Konstantina Dachlythra
We study the problem of EB-leakage that is associated with incomplete polarized CMB sky. In the blind case that assumes no additional information about the statistical properties a…
From top-hat masking to smooth transitions: P-filter and its application to polarized microwave sky maps
Hao Liu, James Creswell, Sebastian von Hausegger +1
In CMB science, the simplest idea to remove a contaminated sky region is to multiply the sky map with a mask that is 0 for the contaminated region and 1 elsewhere, which is also ca…
Methods for pixel domain correction of EB leakage
Hao Liu, James Creswell, Sebastian von Hausegger +1
In observation of the cosmic microwave background (CMB) polarization, "~leakage" refers to the artificial -mode signal coming from the leakage of -mode signal when part o…
Degeneracy of gravitational waveforms in the context of GW150914
James Creswell, Hao Liu, Andrew D. Jackson +2
We study the degeneracy of theoretical gravitational waveforms for binary black hole mergers using an aligned-spin effective-one-body model. After appropriate truncation, bandpassi…
A blind search for a common signal in gravitational wave detectors
Hao Liu, James Creswell, Sebastian von Hausegger +2
We propose a blind, template-free method for the extraction of a common signal between the Hanford and Livingston detectors and apply it especially to the GW150914 event. We constr…
On the time lags of the LIGO signals
James Creswell, Sebastian von Hausegger, Andrew D. Jackson +2
To date, the LIGO collaboration has detected three gravitational wave (GW) events appearing in both its Hanford and Livingston detectors. In this article we reexamine the LIGO data…