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Microarcsecond VLBI pulsar astrometry with PSRPI I. Two binary millisecond pulsars with white dwarf companions
A. T. Deller, S. J. Vigeland, D. L. Kaplan +9
Model-independent distance constraints to binary millisecond pulsars (MSPs) are of great value to both the timing observations of the radio pulsars, and multiwavelength observation…
An Asteroid Belt Interpretation for the Timing Variations of the Millisecond Pulsar B1937+21
R. M. Shannon, J. M. Cordes, T. S. Metcalfe +10
Pulsar timing observations have revealed companions to neutron stars that include other neutron stars, white dwarfs, main-sequence stars, and planets. We demonstrate that the corre…
PSRPI: A large VLBA pulsar astrometry program
A. T. Deller, W. F. Brisken, S. Chatterjee +7
Obtaining pulsar parallaxes via relative astrometry (also known as differential astrometry) yields distances and transverse velocities that can be used to probe properties of the p…
325 MHz VLA Observations of Ultracool Dwarfs TVLM 513-46546 and 2MASS J0036+1821104
T. R. Jaeger, R. A. Osten, T. J. Lazio +2
We present 325 MHz (90 cm wavelength) radio observations of ultracool dwarfs TVLM 513-46546 and 2MASS J0036+1821104 using the Very Large Array (VLA) in June 2007. Ultracool dwarfs…
A Radio Observatory on the Lunar Surface for Solar studies (ROLSS)
R. J. MacDowall, T. J. Lazio, S. D. Bale +5
By volume, more than 99% of the solar system has not been imaged at radio frequencies. Almost all of this space (the solar wind) can be traversed by fast electrons producing radio…
Discovery of Three Pulsars from a Galactic Center Pulsar Population
J. S. Deneva, J. M. Cordes, T. J. W. Lazio
We report the discovery of three pulsars whose large dispersion measures and angular proximity to \sgr indicate the existence of a Galactic center population of neutron stars. The…