R
Roger Blandford
Researcher at Stanford University
Publications - 716
Citations - 97353
Roger Blandford is an academic researcher from Stanford University. The author has contributed to research in topics: Galaxy & Fermi Gamma-ray Space Telescope. The author has an hindex of 156, co-authored 704 publications receiving 90181 citations. Previous affiliations of Roger Blandford include SLAC National Accelerator Laboratory & Max Planck Society.
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Measuring Cosmological Parameters with the JVAS and CLASS Gravitational Lens Surveys
Phillip Helbig,Roger Blandford,Iwa Browne,A. G. de Bruyn,Christopher D. Fassnacht,Neal Jackson,Léon V. E. Koopmans,J. F. Macías-Pérez,D. R. Marlow,Steven T. Myers,R. Quast,David Rusin,Peter N. Wilkinson,E. Xanthopoulos +13 more
TL;DR: In this article, the authors present the constraints on cosmological parameters, particularly the cosmology constant, derived from JVAS and combine them with constraints from optical gravitational lens surveys, ''direct'' measurements of $\Omega 0, $H 0, and the age of the universe, and constraints derived from CMB anisotropies.
Book ChapterDOI
2- and 3-D simulations of magnetocentrifugal disk-winds: Acceleration and stability
TL;DR: In this paper, the acceleration and propagation of the wind from the disk surface to arbitrarily large distances are modeled using a set of 2D axisymmetric simulations, and it is shown that the wind reverts quickly to its initial axisymetric state with no indication of rapid growth of instabilities leading to flow disruption.
Journal ArticleDOI
Class b0445+123
Megan Argo,N. J. Jackson,Ian Browne,T. York,John McKean,A. D. Biggs,Roger Blandford,de Antonius Bruyn,Kyu-Hyun Chae,Christopher D. Fassnacht,Luitje Koopmans,D. R. Marlow,Steven T. Myers,M. A. Norbury,T. J. Pearson,P. M. Phillips,A. C. S. Readhead,D. Rusin,Peter N. Wilkinson +18 more
TL;DR: In this paper, a two-image gravitational lens system has been discovered as a result of the Cosmic Lens All-Sky Survey (CLASS), where radio observations with the VLA, MERLIN and the VLBA at increasingly higher resolutions all show two components with a flux density ratio of ~7:1 and a separation of 1.34
Journal ArticleDOI
A candidate gravitational lens in the Hubble Deep Field
TL;DR: In this paper, the discovery of HDF~J123652+621227, a candidate gravitational lens in the HDF, is reported, which may be multiply imaging several optical sources at different redshifts.
Journal ArticleDOI
Gamma-ray Emission from Crushed Clouds in Supernova Remnants
TL;DR: In this article, the radio and gamma-ray emission observed from newly-found "GeV-bright" supernova remnants (SNRs) can be explained by a model, in which a shocked cloud and shock-accelerated cosmic rays (CRs) frozen in it are simultaneously compressed by the supernova blastwave as a result of formation of a radiative cloud shock.