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The Thermal Sunyaev Zel'dovich effect : a powerful probe for missing baryons
P. J. Zhang, U. L. Pen
About 90% of baryons in the universe have thus far escaped direct observation. This is known as the {\it missing baryon problem}. The Sunyaev Zel'dovich effect (SZ effect) has the…
Detection of Galaxy Spin Alignments in the PSCz Shear Field
Jounghun Lee, Ue-Li Pen
We report the first direct observational evidence for alignment of galaxy spin axes with the local tidal shear field. We measure quantitatively the strength of this directional cor…
The Distance to Clusters: Correcting for Asphericity
David C. Fox, Ue-Li Pen
X-ray and Sunyaev-Zeldovich effect observations can be combined to measure the distance to clusters of galaxies. If the intracluster gas distribution is not spherical, but elongate…
Gravity and Non-gravity Modes in the VIRMOS-DESCART Weak Lensing Survey
Ue-Li Pen, Ludovic van Waerbeke, Yannick Mellier
We analyze the weak lensing data of the VIRMOS imaging survey using projections (called E and B-modes) of the two independents observed correlation functions. The E-mode contains a…
AMiBA: Array for Microwave Background Anisotropy
K. Y. Lo, T. H. Chiueh, R. N. Martin +4
As part of a 4-year Cosmology and Particle Astrophysics (CosPA) Research Excellence Initiative in Taiwan, AMiBA a 19-element dual-channel 85-105 GHz interferometer array is bei…