Scintillation Properties of PSR B1133+16 Measured with Very Long Baseline Interferometry
arXiv:2506.02165 · doi:10.3847/1538-4357/ae0742
Abstract
The scintillation of pulsars reveals small-scale structure of the interstellar medium. A powerful technique for characterizing the scintillating structures (screens) combines analysis of scintillation arcs and very long baseline interferometry (VLBI). We present the results of a VLBI analysis of the scintillation arcs of PSR B1133+16 from simultaneous observations with Arecibo, VLA, Jodrell Bank, Effelsberg, and Westerbork. Three arcs appear in the data set, all of which appear consistent with being the result of very anisotropic scattering screens. We are able to measure their orientations on the sky, down to uncertainties of $5\arcdeg$ for the two stronger screens, and measure distances, of , , and , consistent with, but substantially more precise than what was inferred previously from annual modulation patterns in the scintillation. Comparing with the differential dust extinction with distance in this direction, the two nearer screens appear associated with the wall of the Local Bubble.
12 pages, 6 figures, published in ApJ
References in corpus (9)
- Array Programming with NumPy
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- A parsec-scale Galactic 3D dust map out to 1.25 kpc from the Sun
- The SFXC software correlator for Very Long Baseline Interferometry: Algorithms and Implementation
- Folded Fields as the Source of Extreme Radio-Wave Scattering in the Galactic Center
- A Scintillation Arc Survey of 22 Pulsars with Low to Moderate Dispersion Measures
- Probing the local interstellar medium with scintillometry of the bright pulsar B1133+16
- High Resolution VLBI Astrometry of pulsar scintillation screens with the Transform
- Scintillation of PSR B1508+55 -- the view from a 10,000-km baseline