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NE2025: An Updated Electron Density Model for the Galactic Interstellar Medium
S. K. Ocker, J. M. Cordes
Free electrons in the Galactic interstellar medium (ISM) disperse and scatter coherent radio waves, by amounts that depend on the distance to the radio source. Models of the Galact…
Implications for Galactic Electron Density Structure from Pulsar Sightlines Intersecting HII Regions
S. K. Ocker, L. D. Anderson, T. J. W. Lazio +2
Recent radio surveys have revealed pulsars with dispersion and scattering delays induced by ionized gas that are larger than the rest of the observed pulsar population, in some cas…
NE2001p: A Native Python Implementation of the NE2001 Galactic Electron Density Model
S. K. Ocker, J. M. Cordes
The Galactic electron density model NE2001 describes the multicomponent ionized structure of the Milky Way interstellar medium. NE2001 forward models the dispersion and scattering…
First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
The Event Horizon Telescope Collaboration
We present the calibration and reduction of Event Horizon Telescope (EHT) 1.3mm radio wavelength observations of the supermassive black hole candidate at the center of the radio ga…