J/ApJ/926/65ivo://CDS.VizieR/J/ApJ/926/65doi:10.26093/cds/vizier.19260065CDSXu J.Han J.L.2023-12-14T01:26:22Z2023-10-30T13:32:55ZCDS support team

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

cds-question@unistra.frradio-sourcesintergalactic-mediummagnetic-fieldsredshiftedThe origin of magnetic fields in clusters of galaxies is still a matter of debate. Observations for intracluster magnetic fields over a wide range of redshifts are crucial to constrain possible scenarios for the origin and evolution of the fields. Differences in Faraday rotation measures (RMs) of an embedded double radio source, i.e., a pair of lobes of mostly Fanaroff-Riley type II radio galaxies, are free from the Faraday rotation contributions from the interstellar medium inside the Milky Way and the intergalactic medium between radio galaxies and us, and hence provide a novel way to estimate average magnetic field within galaxy clusters. We have obtained a sample of 627 pairs whose RMs and redshifts are available in the most updated RM catalogs and redshift databases. The RM differences of the pairs are derived. The statistically large RM differences for pairs of redshifts z>0.9 indicate that intracluster magnetic fields are as strong as about 4{mu}G. Such strong magnetic fields in the intracluster medium at the half age of the universe, comparable to the intracluster field strength in nearby galaxy clusters, pose a challenge to the theories of the origin of cosmic magnetic fields.2022ApJ...926...65Xhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/926/65CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)V/154 : Sloan Digital Sky Surveys (SDSS) DR16 (Ahumada+, 2020)J/MNRAS/381/341 : MRCR-SUMSS Ultra-steep-sp. (USS) sample (Broderick+, 2007)J/ApJ/702/1230 : Rotation measure image of the sky (Taylor+, 2009)J/ApJ/714/1170 : Faraday rotation at high Galactic latitude (Mao+, 2010)J/ApJ/795/63 : Faraday rot. from magnesium II absorbers (Farnes+, 2014)J/other/RAA/14.942 : Rotation measures of radio point sources (Xu+, 2014)J/MNRAS/442/3329 : Rotation measures of 2642 quasars (Xu+, 2014)J/ApJ/829/5 : S-PASS & NVSS extragalactic radio sources (Lamee+, 2016)J/MNRAS/469/4034 : Broadband polarisation of radio AGN (O'Sullivan+, 2017)J/ApJ/878/92 : Rotation measures in radio source pairs (Vernstrom+, 2019)J/ApJ/890/132 : MgII abs. toward SDSS QSOs with rot. data (Malik+, 2020)J/MNRAS/495/2607 : IGMF limits with LOFAR (O'Sullivan+, 2020)J/other/PASA/37.29 : POGS-II ExGal catalog (Riseley+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/926/65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/926/65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/926/65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/926/65https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/926/65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/926/65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/926/65/tablea1 (226 double radio sources with RM and redshift data from the compiled data (Xu & Han 2014, J/other/RAA/14.942 and afterward))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/926/65/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/926/65/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/926/65/tablea1?GETtext/xml+votable180.050000true1.187912.81310.005555555555555556Cone search capability for table J/ApJ/926/65/tablea2 (401 double radio sources with RM and redshift data from the NVSS data (Taylor+ 2009, J/ApJ/702/1230))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/926/65/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/926/65/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/926/65/tablea2?GETtext/xml+votable180.050000true0.280423.88970.0055555555555555566/57 207 316 396 562 689 1181 1595 1597 2052 2081 2087 2107 2109 2111 2125 2179 2190 2212 2292 2313 2324 2379 2384 2402 2414 2618 2709 2831 2905 3594 3614 3919 4155 4158 4176 4245 4280 4327 4329 4360 4463 4467 4473 4533 4577 4589 4606 4624 4628-4629 4668 4692 4702 4761 4783 4811 4813 4935 4984 5016 5018 5086 5209 5295 5328 5355 5357 5362 5388 5399 5413 5432 5507 5533 5536 5571 5592 5602 5614 5634 5653 5672 5692 5694 5714 5717 5731 5747 5785 5790 5798 5809 5826 5878 5887 5908 5916 5920 5929-5930 5951 5971 5987 5992 6006 6027 6043-6044 6076 6098 6107 6114 6128 6143 6242 6260 6267 6345 6352 6424 6472 6518 6522 6570 6641 6976 6986 7195 7207 7221 7238 7261 7397 7408 7426 7485 7568 7590 7645 7776 7828 7830 8049 8125 8247 8252 8288 8357 8363 8373 8440 8451 8599 8644 8674 8692 8751 8762 8799 8866 8908 8926-8927 8933 8971 9022-9023 9071 9191 9196 9200 9248 9273 9375 9379-9380 9384 9396 9398 9401-9402 9407 9437 9507 9517 9530 9601 9666 9670 9722 9742 9818 9835 9915-9916 9964 9981 9992 10004 10024 10052 10073 10217 10255 10258 10288 10300 10302 10307 10316 10318 10333 10346 10356 10361 10374 10455 10459 10482 10498 10543 10585 10588-10589 10597 10601 10609 10624 10657 10690 10715 10745 10748 10759 10774 10781 10789 10797 10804 10811 10837 10840-10841 10859 10892 10899 10906 10918 10935 10945 10957-10958 10961 10987 10995 11012 11027 11030-11031 11035 11048 11062 11064 11066 11069 11071-11072 11078 11096 11099 11133 11151 11160 11168 11171-11172 11200 11221-11222 11241 11265 11272 11280 11316 11343 11367 11389 11409 11417 11430 11434 11489 11590 11596 11600 11734 11792 11794 11825 11834 11921 12010 12115 12310 12331 12382 12545 12550 12610 12619 12633 12650 12794 13074 13224 13339 13341 13358 13432 13446 13455 13480 13527 13649 13806 13816 13855 14704 14998 15013 15345 15350 15580 15922 16047 16056 16221 16406 16511 16561 16621 16625 16634 16776 16782 16791 16993 17219 17293 17362 17406 17471 17511 17516 17624 17627 17702 17709 17742 17802 17828 17862 17915 17965 18014 18017 18040 18114 18131 18147 18185 18398 19040 19061 19091 19166 19224 19352 19381 19408 19495 19542 19574 19616 19655 19717 19724 19777 19885 19896 19903 19916 19925 20013 20091 20121 20128 20217-20218 20224 20239 20284 20286 20312 20327 20346 20384 20426 20432 20881 21380 21587 21753 22183 22350 22364 22505 22520 22887 22894 23050 23126 23476 23529 23680 23835 24023 24121 24155 24176 24606 24619 24709 24724 24867 25121 25478 25682 25849 25906 25943 25954 25962 26109 26234 26269 26278 26299 26326 26343 26361 26400 26420 26444 26465 26507 26534 26536 26604 26623 26736 26863 27117 27206 27236 27399 27422 27554 27606 27614 27631 27665 27685 27773 27793-27794 27821 27844 27861 27872 27934 27937 27955 27967 28002 28015 28039 28063 28071 28095 28103 28124 28134 28145 28149 28154 28173 28244 28269 28299 28314 28318 28331 28373 28401 28410 28424 28429 28454 28510 28514 28520 28545-28546 28551 28569 28574 28583 28609 28619 28664 29764 30140 30825 30844 30959 31294 31354 31392 31404 31449 31536 31572 31617 31625 31662 31697 31940 31955 32322 32393 32431 32463 32477-32478 32500 32677 32685 34510 34535 34653 34669 34755 35288 35528 35580 35608 35651 36018 36052 36085 36094 36100 36151 36160 36216 36477 36543 36595 36814 38872 38911 39597 39614 39722 40254 42060 42788 42950 43743 43756 44120 44677 44938 45031 46588 46814 47013 47082 48347 48364 48386 48467 48493 48575 48742 48756 48973 49140https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/926/65?format=asciiRadiodefaultJ/ApJ/926/65/tablea1226 double radio sources with RM and redshift data from the compiled data (Xu & Han 2014, J/other/RAA/14.942 and afterward)z[0.026/3.14] Redshift of double radio sourcesrc.redshiftfloatf_z[*] * = Reliable redshift information from the original referencesmeta.codecharDeltar[0.1/40]? Angular separation of double radio sourcearcminmeta.code.multip;pos.angDistancefloatnullableLS[12/4404]? Projected linear separation of double radio sourcekpcpos.angDistanceintnullableDeltaRM[-726/539] Rotation measure differencerad.m**-2phys.polarization.rotMeasure;arith.diffdoublef_DeltaRM[d] d=source removed from the final sample used for the analysismeta.codechare_DeltaRM[0.006/52.5] Uncertainty in DeltaRMrad.m**-2stat.errorfloatX14Display data from Xu+ 2014, J/other/RAA/14.942 within 1" of Sources 1 and 2meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Source 1 Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-56.7/80] Source 1 Declination (J2000)degpos.eq.dec;meta.mainRM1[-349.2/298] Source 1 rotation measurerad.m**-2phys.polarization.rotMeasuredoublee_RM1[0.002/36.4] Uncertainty in RM1rad.m**-2stat.errorfloatRA2degSource 2 Right Ascension (J2000)degpos.eq.raDE2deg[-56.6/80] Source 2 Declination (J2000)degpos.eq.decRM2[-344.7/552] Source 2 rotation measurerad.m**-2phys.polarization.rotMeasuredoublee_RM2[0.003/38] Uncertainty in RM2rad.m**-2stat.errorfloatRefReference bibcode (1)meta.bib.bibcodecharJ/ApJ/926/65/tablea2401 double radio sources with RM and redshift data from the NVSS data (Taylor+ 2009, J/ApJ/702/1230)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Source 1 Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-37.2/83] Source 1 Declination (J2000)degpos.eq.dec;meta.mainRM1[-231.1/96] Source 1 rotation measurerad.m**-2phys.polarization.rotMeasuredoublee_RM1[0.6/25.4] Uncertainty in RM1rad.m**-2stat.errorfloatRA2degSource 2 Right Ascension (J2000)degpos.eq.raDE2deg[-37.2/83] Source 2 Declination (J2000)degpos.eq.decRM2[-225/107.4] Source 2 rotation measurerad.m**-2phys.polarization.rotMeasuredoublee_RM2[0.6/28.7] Uncertainty in RM2rad.m**-2stat.errorfloatRefReference code (tss09=2009, J/ApJ/702/1230)meta.notecharz[0.003/5.2] Redshift of double radio sourcesrc.redshiftfloatDeltar[0.74/6.6] Angular separation of double radio sourcearcminmeta.code.multip;pos.angDistancefloatLS[5/2835] Projected linear separation of double radio sourcekpcpos.angDistanceintDeltaRM[-102.4/49.8] Rotation measure differencerad.m**-2phys.polarization.rotMeasure;arith.diffdoublef_DeltaRM[d] d=source removed from the final sample used for the analysismeta.codechare_DeltaRM[0.9/29.3] Uncertainty in DeltaRMrad.m**-2stat.errorfloatT09Display data from Taylor+ 2009, J/ApJ/702/1230 within 1" of Sources 1 and 2meta.ref.urlchar