Contact Information

David H. Roberts
Abelson 326
(781) 736-2846
roberts@brandeis.edu

Group webpage

David H. Roberts

david robertsWilliam R. Kenan Jr. Professor of Astrophysics
Ph.D., Stanford University, 1973

David Roberts is engaged in high resolution astronomical observations of active galaxies (quasars, radio and Seyfert galaxies, and BL Lacertae objects) at wavelengths covering the entire electromagnetic spectrum. This is carried out with the Very Large Array and the Very Long Baseline Array, including its extension into space with the HALCA satellite. He is particularly interested in linear polarization observations in order to study the magnetic field structure in active galactic nuclei. Professor Roberts is a member of the Brandeis Astrophysics group.

CV and list of publications
complete list of publications from ADS

Recent Ph.D. Students

Andreas Rauch (2013) "A New Method of Constraining the Orientation Of Radio-loud Quasars on kpc Scales" Present Position: Otto Hahn Gymnasium, Gottingen, Germany

Michael Bell (2010) "Two-Frequency, Multi-epoch VLA Observations of SS 433".  Present Position: Postdoctoral Researcher, Max Planck Institute, Germany

George Moellenbrock (1999) " VLBA Polarization Observations of Gamma-Ray Blazars at 15 and 22 GHz " Present Position: Assistant Scientist, AIPS + + Project, National Radio Astronomy Observatory, Socorro, NM

Joanne Attridge (1999) "Magnetic Field Structures in the Parsec-Scale Radio Jets of Blazars" Present Position: Senior Systems Engineer, Integrated Defense Systems, Raytheon Electronic Systems, Bedford, MA


Sample of Recent Publications

“The Abundance of X-shaped Radio Sources. I. VLA Survey of 52 Sources with Off-axis Distortions”  Roberts, David H.; Cohen, Jake P.; Lu, Jing; Saripalli, Lakshmi; Subrahmanyan, Ravi; Astrophys. J. Supplement, vol 220, p7 (2015)

“The Abundance of X-shaped Radio Sources: Implications for the Gravitational Wave Background” Roberts, David H.; Saripalli, Lakshmi; Subrahmanyan, Ravi; Astrophys. J. vol 801, p 6 (2015)

“The Structure and Linear Polarization of the Kiloparsec-scale Jet of the Quasar 3C 345” Roberts, David H.; Wardle, John F. C.; Marchenko, Valerie V.; Astron. J. vol 145, p 49 (2013)

“Evidence for Highly Relativistic Velocities in the Kiloparsec-scale Jet of the Quasar 3C 345” Roberts, David H.; Wardle, John F. C.; Astrophys. J. vol  759 p 35 (2012)

“Structure and Magnetic Fields in the Precessing Jet System SS 433. III. Evolution of the Intrinsic Brightness of the Jets from a Deep Multi-epoch Very Large Array Campaign”  Bell, Michael R.; Roberts, David H.; Wardle, John F. C.; Astrophys. J. vol  736, p 118 (2011)

“Structure and Magnetic Fields in the Precessing Jet System SS 433. II. Intrinsic Brightness of the Jets” Roberts, David H.; Wardle, John F. C.; Bell, Michael R.; Mallory, Matthew R.; Marchenko, Valerie V.; Sanderbeck, Phoebe U.; Astrophys. J.  vol  719, p 1918 (2010)