Rotation measures in the fourth Galactic quadrant (Nota+, 2010)

Details Rotation measures in the fourth Galactic quadrant (Nota+, 2010) Rotation measures in the fourth Galactic quadrant (Nota+, 2010)

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..35139065n&link_type=abstract

VizieR On-line Data Catalog: J/A+A/513/A65. Originally published in: 2010A&A...513A..65N

Physics

Magnetic Fields, Interstellar Medium, Pulsars

Scientific paper

We have re-examined the published rotation measures (RMs) of extragalactic point sources and pulsars with |b|<3° to study the magnetic field in the fourth Galactic quadrant.
We reduced the influence of structure in electron density as much as possible by excluding objects for which Hα-data indicate large fluctuations in ne somewhere along the line of sight. We also excluded objects for which the RM may have been significantly "corrupted" by an intervening supernova remnant. We modelled RM(l), the longitude dependence of RM of the unaffected extragalactic sources and pulsars. We assumed several geometries for the large-scale field. All but one of those are based on logarithmic spiral arms (with various pitch angles and widths), while one has circular symmetry. We also made different assumptions about the large-scale ne-distribution.
(5 data files).

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