NE2001

Data: 1143 Pulsars Used to Test TC93, GBC01 and NE2001 (DM Excesses)

Code: NE2001_1.0   gzipped tar file with code and input files (68 kB)   27 Jan 2003
Code: NE2001_0.9   gzipped tar file with code and input files (68 kB)   16 Jul 2002

Paper I: A New Model for the Galactic Distribution of Free Electrons and its Fluctuations
J. M. Cordes & T. J. W. Lazio
08 July 2002, revised 28 January 2003

Preprint: gzipped postscript file (422 kB)   28 Jan 2003

Figure 1: Venn diagram of measurements used
Figure 2: Electron density evaluated in the Galactic plane
Figure 3: Model components vs. r and z
Figure 4: DM deficit for model of Gomez, Benjamin & Cox (2001)
Figure 5: DM deficit for TC93 model
Figure 6: Spiral arm definitions
Figure 7: Local ISM Components
Figure 8: Distance estimates projected on Galactic plane
Figure 9: DM Distance estimates vs. empirical distances
Figure 10: Histogram of ratio of predicted to measured scattering observable
Figure 11: Asymptotic model DM vs. Galactic longitude
Figure 12: Fractional distance error vs. Galactic longitude
Figure 13: NE2001 distances plotted against TC93 distances
Figure 14: Contours of DM on Galactic plane
Figure 15: Contours of asymptotic DM vs l,b (aitoff projection)
Figure 16: Contours of SM on Galactic plane
Figure 17: Contours of asymptotic SM vs l,b (aitoff projection)

Paper II: Using Radio Propagation Data to Construct a Galactic Distribution of Free Electrons
J. M. Cordes & T. J. W. Lazio
27 Jan 2003

Preprint: gzipped postscript file (505 kB)   27 Jan 2003

Figure 1: Component of DM perpendicular to the Galactic Plane
Figure 2: Scatter plots of DM vs. Galactic longitude
Figure 3: Scatter plots of DM vs. Galactic latitude
Figure 4: Schematic views of the Galaxy
Figure 5: Plots of line-of-sight average n_e vs Galactic longitude and latitude
Figure 6: Scatter plot of SM vs. Galactic latitude
Figure 7: Pulse broadening time at 1 GHz plotted against DM
Figure 8: SM plotted against DM for 269 pulsars
Figure 9: Spiral model of the Galaxy used in TC93 and NE2001
Figure 10: Local ISM components of the model and points for nearby pulsars (xy)
Figure 11: Local ISM components of the model and points for nearby pulsars (xz)
Figure 12: Local ISM components of the model and points for nearby pulsars (yz)
Figure 13: DM plotted against Galactic latitude for model and data


Paper III: Astronomical Implications
in preparation


Paper IV: Astrophysical Implications
in preparation


last updated: 27 Jan 2003 by Jim Cordes cordes@astro.cornell.edu