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Parkes observations for project P996 semester 2019APRS_03
We propose to measure the polarisation of 107 southern pulsars (distance>5kpc. 77 in this semester)
using the Ultra-Wideband Low (UWL) receiver to investigate the structure of the Galactic
disk magnetic field in and between distant spiral arms. Previous Parkes pulsar observations
have revealed field reversals in nearby arm and interarm re... moregions. We wish to exploit the
greater sensitivity of the UWL receive r to extend this to more distant regions, thereby allowing
us to distinguish more clearly between different models for the structure of the disk field.
Because of the intrinsic uncertainty in DM-based pulsar distances, averaging data over groups
of pulsars is necessary to confidently demonstrate any magnetic-field reversals.
This work will have important implications for theories for the generation of Galactic magnetic
fields and for other areas, e.g., cosmic-ray physics, which depend on a knowledge of the
large-scale Galactic magnetic field for their interpretation. less
Astronomical and Space Sciences not elsewhere classified
01 Apr 2019
30 Sep 2019
Creative Commons Attribution 4.0 International Licence
Han, Jinlin; Manchester, Dick; Hobbs, George; van Straten, Willem (2019): Parkes observations for project P996 semester 2019APRS_03. v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2019.
Access to this collection's metadata and/or files (if any) are restricted until 30 Mar 2021.
Australia Telescope National Facility
P996 - Magnetic field reversals in distant spiral arms
The Parkes radio telescope has found nearly two-thirds of the known pulsars. These pulsars are widely distributed in our Galaxy, making them valuable probes of the Galactic interstellar medium. In particular, measurements of the polarisation of pulsar radio emission allows measurement of Faraday rotation in the interstellar medium and hence the str... moreength and direction of the Galactic magnetic field. We propose to extend earlier work to reveal magnetic field structures in more distant regions of the Galaxy by exploiting the wide bandwidth and high sensitivity of the newly installed Ultra-Wideband Low receiver. less
Willem van Straten
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