The effect of HII regions on rotation measure of pulsars

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dc.creatorMitra, Dipanjan
dc.creatorWielebinski, Richard
dc.creatorKramer, Michael
dc.creatorJessner, Axel
dc.date2002-11-15
dc.date2003-04-03
dc.date.accessioned2026-07-07T13:02:31Z
dc.date.available2026-07-07T13:02:31Z
dc.descriptionWe have obtained new rotation measure for 11 pulsars observed with the Effelsberg 100-m radio telescope, in the direction of the Perseus arm. Using a combination of 34 published and the 11 newly measured pulsar rotation measures we study the magnetic field structure towards the Perseus arm. We find that two pulsars towards l$\sim$ 149$^{\circ}$ (Region 1) and four pulsars towards l$\sim113^{\circ}$ (Region 2) lie behind HII regions which seriously affects the pulsar rotation measures. The rotation measure of PSR J2337+6151 seem to be affected by its passage through the supernova remnant G114.3+0.3. For Region 1, we are able to constrain the random component of the magnetic field to $5.7μ$G. For the large-scale component of the Galactic magnetic field we determine a field strength of $1.7\pm1.0μ$G. This average field is constant on Galactic scales lying within the Galactic longitude range of $85^{\circ} <$ l $ < 240^{\circ}$ and we find no evidence for large scale field reversal upto 5-6 kpc. We highlight the great importance to include the effects of foreground emission in any systematic study.
dc.descriptionReplaced by the printed version in Astronomy and Astrophysics and includes erratum and new reference
dc.identifierhttps://arxiv.org/abs/astro-ph/0211374
dc.identifierhttp://arxiv.org/abs/astro-ph/0211374
dc.identifierAstron.Astrophys.398:993-1006,2003; Astron.Astrophys.403:585-586,2003
dc.identifierdoi:10.1051/0004-6361:20021702
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226476
dc.subjectAstrophysics
dc.titleThe effect of HII regions on rotation measure of pulsars
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