J/ApJ/714/1170ivo://CDS.VizieR/J/ApJ/714/1170doi:10.26093/cds/vizier.17141170CDSMao S.A.Gaensler B.M.Haverkorn M.Zweibel E.G.Madsen G.J.,McClure-Griffiths N.M.Shukurov A.Kronberg P.P.2017-06-20T13:16:13Z2012-05-21T13:50:33ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmilky-way-galaxymagnetic-fieldsradio-sourcespolarimetrygalaxy-rotationWe present a study of the vertical magnetic field of the Milky Way toward the Galactic poles, determined from observations of Faraday rotation toward more than 1000 polarized extragalactic radio sources at Galactic latitudes |b|>=77{deg}, using the Westerbork Radio Synthesis Telescope and the Australia Telescope Compact Array. We find median rotation measures (RMs) of 0.0+/-0.5rad/m^2^ and +6.3+/-0.7rad/m^2^ toward the north and south Galactic poles, respectively, demonstrating that there is no coherent vertical magnetic field in the Milky Way at the Sun's position. If this is a global property of the Milky Way's magnetism, then the lack of symmetry across the disk rules out pure dipole or quadrupole geometries for the Galactic magnetic field. The angular fluctuations in RM seen in our data show no preferred scale within the range ~0.1{deg} to ~25{deg}. The observed standard deviation in RM of ~9rad/m^2^ then implies an upper limit of ~1uG on the strength of the random magnetic field in the warm ionized medium at high Galactic latitudes.2010ApJ...714.1170Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/714/1170CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/A+A/513/A65 : Rotation measures in the fourth Galactic quadrant (Nota+,J/ApJ/702/1230 : Rotation measure image of the sky (Taylor+, 2009)J/MNRAS/386/1881 : New pulsar rotation measures (Noutsos+, 2008)J/ApJ/663/258 : Rotation measures of extragalactic sources in SGPS (Brown+,J/ApJ/642/868 : Rotation measures for 223 pulsars (Han+, 2006)J/ApJS/145/213 : Rotation measures of compact sources in CGPS (Brown+, 2003)J/A+A/372/276 : Polarization catalogue for NGP area (Berdyugin+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/714/1170https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/714/1170http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/714/1170https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/714/1170https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/714/1170http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/714/1170GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/714/1170/rotation (Rotation measures of extragalactic sources towards the north and south Galactic poles)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/714/1170/rotation?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/714/1170/rotation?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/714/1170/rotation?GETtext/xml+votable180.050000true196.784708324.78352780.0055555555555555565/2573 2608 2690 2693 2720 4120 6996 7009 7019 7117 8862 6/8875 8890 10244 10246 10249 10250 10251 10253 10254 10257 10260 10265 10266 10268 10272 10273 10274 10276 10278 10279 10282 10284 10288 10290 10299 10302 10306 10313 10314 10318 10336 10337 10338 10342 10345 10346 10348 10349 10350 10360 10362 10368 10369 10372 10373 10374 10377 10380 10384 10385 10387 10390 10392 10393 10395 10396 10398 10400 10402 10411 10412 10413 10417 10418 10420 10422 10423 10426 10427 10428 10429 10430 10436 10438 10440 10442 10443 10446 10447 10450 10456 10459 10465 10466 10467 10469 10470 10474 10475 10476 10478 10482 10754 10755 10756 10758 10759 10765 10766 10767 10769 10770 10780 10783 10786 10787 10789 10790 10791 10794 10797 10801 10802 10803 10804 10805 10806 10809 10810 10812 10813 10814 10816 10818 10820 10821 10822 10896 16405 16407 16409 16413 16415 16433 16435 16438 16441 16444 16445 16446 16453 16456 16458 16459 16460 16462 16469 16470 16471 16475 16477 16479 16488 16490 16493 16494 16496 16498 16499 16500 16504 16508 16510 16533 16577 16578 16580 16582 16591 16595 16597 16600 16601 16604 16606 16607 16613 16615 16625 16626 16630 16631 16641 16645 16649 16651 16654 16655 16656 16659 16663 16664 16665 16666 16668 16671 16672 16674 16676 16678 16679 16680 16685 16690 16691 16692 16694 16697 16698 16705 16708 16709 16714 16720 16721 16722 16724 16727 16728 16732 16733 16735 16739 16744 16746 16748 16758 16762 16765 16766 16773 16774 16775 16776 16777 16780 16781 16783 16784 16785 16788 16790 16791 16792 16794 16796 16798 16799 16806 16808 16812 16813 16816 16818 16820 16832 16839 16840 16844 16845 16847 16850 16852 16864 16868 16869 17408 17440 17442 26606 26618 26619 27923 27926 27927 27930 27931 27932 27934 27941 27948 27950 27955 27956 27958 27960 27967 27970 27971 27972 27974 27976 27977 27981 27982 27983 27988 27989 27990 27994 27995 27999 28000 28002 28005 28007 28013 28015 28017 28018 28025 28028 28031 28035 28041 28044 28045 28052 28054 28055 28057 28059 28062 28067 28071 28083 28084 28085 28087 28088 28092 28095 28097 28099 28102 28103 28105 28107 28108 28109 28111 28113 28116 28121 28124 28126 28127 28128 28130 28133 28134 28135 28138 28139 28141 28145 28146 28149 28150 28153 28154 28155 28157 28421 28423 28429 28431 28433 28434 28435 28436 28437 28439 28442 28443 28444 28446 28455 28464 28465 28476 28479 28480 28482 28483 28484 28489 28490 28491 28492 28497 28498 28499 28501 28503 28505 28506 28507 28509 28510 28512 28513 28517 28519 28520 28523 28527 28528 28529 28530 28536 28537 28540 28541 28543 28564 28565 28609 28615 28620 28621 28626 28628 28630 28631 28632 28636 35439 35442 35446 35447 35454 35455 35509 35510 35518 35521 35525 35527 35528 35532 35533 35536 35537 35541 35545 35547 35548 35550 35555 35557 35561 35562 35566 35567 35568 35570 35574 35577 35580 35581 35595 35599 35610 35611 35614 35616 35617 35621 35625 35628 35630 35635 35636 35637 35639 35644 35646 35647 35680 35682 35683 35694 35695 35698 35706 35707 35710 35713 35716 35717 35721 35722 35723 35730 35733 35734 35735 35739 35740 35742 35745 35754 35760 35764 35765 35766 35771 35774 35775 35776 35779 35780 35782 35783 35786 35787 35788 35789 35790 35792 35794 35795 35798 35799 35801 35809 35810 35813 35817 35818 35823 35826 35833 35834 35836 35837 35839 36520https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/714/1170?format=asciiRadiodefaultJ/ApJ/714/1170/rotationRotation measures of extragalactic sources towards the north and south Galactic polesRMRotation measurerad.m**-2phys.polarization.rotMeasureinte_RMUncertainty in RMrad.m**-2stat.errorintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatPIDebiased polarized flux (1)mJyphot.flux.densityfloatITotal intensity (1)mJyphot.flux.densitydoubleS5.2[Yes/No ] Used in Section 5.2 to determinate magnetic fields?meta.codecharf_S5.2[abcd] Discarded source (2)meta.codecharNVSSDisplay the data from NVSS catalog (within 30")meta.ref.urlchar