LOFAR PSR low-frequency Faraday rotation measures Virtual Observatory Resource

Authors
  1. Sobey C.
  2. Bilous A.V.
  3. Griessmeier J.-M.
  4. Hessels J.W.T.
  5. Karastergiou A.,Keane E.F.
  6. Kondratiev V.I.
  7. Kramer M.
  8. Michilli D.
  9. Noutsos A.
  10. Pilia M.,Polzin E.J.
  11. Stappers B.W.
  12. Tan C.M.
  13. Leeuwen J.van
  14. Verbiest J.P.W.,Weltevrede P.
  15. Heald G.
  16. Alves M.I.R.
  17. Ensslin T.Carretti E.
  18. Haverkorn M.,Iacobelli M.
  19. Reich W.
  20. Van Eck C.
  21. Published by
    CDS
Abstract

We determined Faraday rotation measures (RMs) towards 137 pulsars in the northern sky, using Low-Frequency Array (LOFAR) observations at 110-190MHz. This low-frequency RM catalogue, the largest to date, improves the precision of existing RM measurements on average by a factor of 20 - due to the low frequency and wide bandwidth of the data, aided by the RM synthesis method. We report RMs towards 25 pulsars for the first time. The RMs were corrected for ionospheric Faraday rotation to increase the accuracy of our catalogue to approximately 0.1rad/m^2^. The ionospheric RM correction is currently the largest contributor to the measurement uncertainty. In addition, we find that the Faraday dispersion functions towards pulsars are extremely Faraday thin - mostly less than 0.001rad/m^2^. We use these new precise RM measurements (in combination with existing RMs, dispersion measures, and distance estimates) to estimate the scale height of the Galactic halo magnetic field: 2.0(3)kpc for Galactic quadrants I and II above and below the Galactic plane (we also evaluate the scale height for these regions individually). Overall, our initial low-frequency catalogue provides valuable information about the 3-D structure of the Galactic magnetic field.

Keywords
  1. pulsars
  2. magnetic-fields
Bibliographic source Bibcode
2019MNRAS.484.3646S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/3646
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/484/3646

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/484/3646
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/484/3646
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/3646
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/484/3646/tablea1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/484/3646/tablea1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/484/3646/tablea1?

History

2019-02-27T09:30:18Z
Resource record created
2019-02-27T09:30:18Z
Created
2019-03-11T08:02:37Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr