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225 papers · 1 filter
Power Asymmetry in Cosmic Microwave Background Fluctuations from Full Sky to Sub-degree Scales: Is the Universe Isotropic?
F. K. Hansen, A. J. Banday, K. M. Gorski +2
We repeat and extend the analysis of Eriksen et al 2004 and Hansen et al 2004 testing the isotropy of the Cosmic Microwave Background (CMB) fluctuations. We find that the hemispher…
Spin Needlets for Cosmic Microwave Background Polarization Data Analysis
Daryl Geller, Frode K. Hansen, Domenico Marinucci +2
Scalar wavelets have been used extensively in the analysis of Cosmic Microwave Background (CMB) temperature maps. Spin needlets are a new form of (spin) wavelets which were introdu…
Explanation of the activity sensitivity of Mn I 5394.7 Å
N. Vitas, B. Viticchiè, R. J. Rutten +1
There is a long-standing controversy concerning the reason why the Mn I 5394.7 A line in the solar irradiance spectrum brightens more at larger activity than most other photospheri…
Resolving the discrepancy between lensing and X-ray mass estimates of the complex galaxy cluster Abell 1689
Signe Riemer-Sorensen, Danka Paraficz, Desiree Della Monica Ferreira +3
There is a long-standing discrepancy between galaxy cluster masses determined from X-ray and gravitational lensing observations of which Abell 1689 is a well-studied example. In th…
2006 Whole Earth Telescope Observations of GD358: A New Look at the Prototype DBV
J. L. Provencal, M. H. Montgomery, A. Kanaan +53
We report on the analysis of 436.1 hrs of nearly continuous high-speed photometry on the pulsating DB white dwarf GD358 acquired with the Whole Earth Telescope (WET) during the 200…
CMBPol Mission Concept Study: Prospects for polarized foreground removal
J. Dunkley, A. Amblard, C. Baccigalupi +28
In this report we discuss the impact of polarized foregrounds on a future CMBPol satellite mission. We review our current knowledge of Galactic polarized emission at microwave freq…