5 papers · 1 filter
Spinning Black Holes in Active Galactic Nuclei
Y. Dabrowski
Recent X-ray spectroscopy made with ASCA have shown broad, skewed iron line emission from Seyfert-1 galaxies. The large extent of the red tail allows probing of the innermost regio…
Review of Ground-Based CMB Experiments
A. N. Lasenby, A. W. Jones, Y. Dabrowski
We present in this paper a brief review of Ground-Based Cosmic Microwave Background (CMB) experiments. We first recall the main experimental problems and adopted solutions. We then…
Invisible Clusters and CMB Decrements
Youri Dabrowski
A decrement in the Cosmic Microwave Background (CMB) has been observed by the Ryle Telescope towards a pair of, possibly lensed, quasars (PC1643+4631 A&B). Assuming that the decrem…
Rotating Astrophysical Systems and a Gauge Theory Approach to Gravity
A. N. Lasenby, C. J. L. Doran, Y. Dabrowski +1
We discuss three applications of a gauge theory of gravity to rotating astrophysical systems. The theory employs gauge fields in a flat Minkowski background spacetime to describe g…
Effect of a Collapsing Cluster on the CMB temperature and Power Spectrum
Y. Dabrowski, M. P. Hobson, A. N. Lasenby +1
We present a new model for the formation of spherically symmetric clusters in an expanding Universe. Both the Universe and the collapsing cluster are governed by the same pressure…