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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…
Evidence of Short Timescale Flux Density Variations of UC HII regions in Sgr B2 Main and North
C. G. De Pree, T. Peters, M. -M. Mac Low +6
We have recently published observations of significant flux density variations at 1.3 cm in HII regions in the star forming regions Sgr B2 Main and North (De Pree et al. 2014). To…
Observations of a high-mass protostar in NGC 7538S
Melvyn Wright, Jun-Hui Zhao, Goran Sandell +3
We present high angular resolution continuum observations of the high-mass protostar NGC 7538S with BIMA and CARMA at 3 and 1.4 mm, VLA observations at 1.3, 2, 3.5 and 6 cm, and ar…
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…
Radio Astrometry Of The Triple Systems Algol And UX Arietis
William M. Peterson, Robert L. Mutel, Jean-Francois Lestrade +2
We have used multi-epoch long-baseline radio interferometry to determine the proper motion and orbital elements of Algol and UX Arietis, two radio-bright, close binary stellar syst…
NGC7538 IRS1 - an ionized jet powered by accretion
G. Sandell, W. M. Goss, M. Wright +1
Analysis of high spatial resolution VLA images shows that the free-free emission from NGC7538 IRS1 is dominated by a collimated ionized wind. We have re-analyzed high angular resol…