J/ApJ/829/5ivo://CDS.VizieR/J/ApJ/829/5doi:10.26093/cds/vizier.18290005CDSLamee M.Rudnick L.Farnes J.S.Carretti E.Gaensler B.M.,Haverkorn M.Poppi S.2018-01-02T13:42:47Z2017-01-16T13:41:59ZCDS support team

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

cds-question@unistra.frpolarimetryradio-sourcesinfrared-photometryWe present a polarization catalog of 533 extragalactic radio sources that have a 2.3GHz total intensity above 420mJy from the S-band Polarization All Sky Survey, S-PASS, with corresponding 1.4GHz polarization information from the NRAO VLA Sky Survey, NVSS. We studied the selection effects and found that fractional polarization, {pi}, of radio objects at both wavelengths depends on the spectral index, the source magnetic field disorder, the source size, and depolarization. The relationship between depolarization, spectrum, and size shows that depolarization occurs primarily in the source vicinity. The median {pi}_2.3_ of resolved objects in NVSS is approximately two times larger than that of unresolved sources. Sources with little depolarization are ~2 times more polarized than both highly depolarized and re-polarized sources. This indicates that intrinsic magnetic field disorder is the dominant mechanism responsible for the observed low fractional polarization of radio sources at high frequencies. We predict that number counts from polarization surveys will be similar at 1.4GHz and at 2.3GHz, for fixed sensitivity, although ~10% of all sources may currently be missing because of strong depolarization. Objects with {pi}_1.4_~{pi}_2.3_>=4% typically have simple Faraday structures, so they are most useful for background samples. Almost half of flat-spectrum ({alpha}>=-0.5) and ~25% of steep-spectrum objects are re-polarized. Steep-spectrum, depolarized sources show a weak negative correlation of depolarization with redshift in the range 0<z<2.3. Previous non-detections of redshift evolution are likely due the inclusion of re-polarized sources as well.2016ApJ...829....5Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/829/5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/311 : WISE All-Sky Data Release (Cutri+ 2012)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/ApJS/212/15 : Polarized NVSS sources SEDs (Farnes+, 2014)J/ApJ/771/105 : MWA Stokes I 189MHz sources (Bernardi+, 2013)J/MNRAS/436/2915 : Polarization of bright AT20G sources (Massardi+, 2013)J/ApJ/755/21 : Extragalactic radio source rotation measures (Mao+, 2012)J/AJ/144/105 : MOJAVE. VIII. Faraday rotation in AGN jets. (Hovatta+, 2012)J/ApJS/188/178 : VLA 1.4GHz obs. of GOODS-North field (Morrison+, 2010)J/MNRAS/402/2792 : 1388MHz ATLBS Low-Brightness Survey (Subrahmanyan+, 2010)J/ApJ/702/1230 : Rotation measure image of the sky (Taylor+, 2009)J/ApJ/666/201 : Radio polarimetry of the ELAIS N1 field (Taylor+, 2007)J/MNRAS/371/898 : Extragalactic radio sources at 20GHz (Sadler+, 2006)J/MNRAS/360/1305 : Polarization of extragalactic sources (Roy+, 2005)J/ApJS/124/285 : VLA Images of Extragalactic Objects (Reid+, 1999)J/A+AS/135/571 : Extragalactic radio sources polarization (Zukowski+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/829/5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/829/5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/829/5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/829/5https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/829/5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/829/5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/829/5/table1 (Full catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/829/5/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/829/5/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/829/5/table1?GETtext/xml+votable180.050000true69.40246-29.901470.0055555555555555566/16415 16427 16444 16483 16496 16509 16512 16518 16592 16614 16619 16635 16676 16720 16732 16762 16764 16787 16792 16806 16813 16842 16844 16884 16901 16904 16923 16998 17003 17011 17015 17019 17026 17048 17095 17100 17114 17141 17142 17158 17178 17184 17185 17188 17206 17215 17220 17224 17230 17247 17316 17319 17333 17351 17362 17401 17414 17424 17441 17443 17445 17467 17485 17488 17507 17520 17541 17542 17544 17576 17579 17588 17606 17620 17639 17662 17693 17718 17719 17723 17730 17737 17754 17763 17812 17825 17937 17972 17979 17996 17999 18000 18002 18005 18022 18065 18089 18096 18437 18457 18468 18485 18491 18506 18531 18545 18561 18592 18624 18669 18670 18680 18718 18726 18752 18755 18766 18769 18784 19088 20486 20500 20507 20535 20537 20573 20594 20607 20609 20625 20644 20689 20706 20715 20744 20746 20747 20878 21012 21049 21075 21109 21121 21126 21133 21163 21173 21196 21241 21298 21588 21713 21749 21758 21768 21774 21780 21785 21789 21905 22598 22619 22658 22659 22696 22699 22741 22753 22754 22774 22827 22950 23045 23071 23075 23099 23121 23210 24605 24606 24615 24722 24753 24766 24796 24845 24849 24854 24888 24892 24906 24923 24936 24940 24967 25016 25032 25048 25112 25126 25128 25131 25145 25188 25196 25203 25209 25231 25233 25239 25255 25256 25260 25332 25396 25405 25428 25472 25479 25501 25503 25626 25630 25677 25689 25693 25720 25727 25742 25762 25773 25818 25822 25824 25870 25900 25905 25914 25948 25953 25990 26000 26131 26149 26178 26195 26202 26245 26624 26639 26679 26730 26752 26769 26884 26898 26900 26904 26916 26932 26937 26966 26968 26981 26982 27013 27017 27026 27138 27139 27195 27212 27220 27233 27238 27241 27290 31247 31332 31400 34174 34250 34293 34296 34399 34428 34483 34510 34513 34517 34532 34534 34571 34572 34575 34603 34606 34616 34650 34665 34666 34669 34675 34691 34699 34703 34715 34727 34763 34808 35251 35260 35288 35294 35304 35442 35449 35501 35515 35528 35568 35651 35666 35696 35699 35706 35712 35786 35788 35792 35801 35810 35812 35843 35864 35934 35937 35952 36014 36058 36100 36111 36139 36155 36178 36188 36209 36213 36219 36230 36252 36277 36281 36295 36313 36337 36375 36380 36382 36391 36408 36417 36418 36423 36431 36520 36550 36554 36587 36603 36606 36615 36627 36637 36638 36640 36652 36706 36749 36795 36829 36840 38682 38759 38763 38769 38777 39653 39848 40060 40275 40331 40339 40354 40360 40379 40385 40529 40533 40692 40700 40704 40725 40730 40742 40766 40794 40822 40832 40905 40922 40946 40949 43708 43862 43870 43900 43981 43986 44028 44218 44549 44554 44555 44579 44592 44598 44607 44614 44650 44654 44655 44658 44662 44669 44681 44749 44762 44771 44776 44779 44859 44908 44927 44979 45006 45011 45012 45028 45046 46518 46552 46562 46568 46573 46709 46715 46789 46835 46859 46860 46868 46887 46921 46924 46948 46964 46965 46984 46995 47007 47016 47022 47057 47080 47573 47605 48095 48161 48169 48210 48228 48232 48252 48256 48320 48323 48324 48337 48362 48392 48398 48449 48488 48496 48516 48523 48529 48530 48535 48572 48579 48582 48595 48625 48692 48712 48719 48724 48736 48744 48757 48770 48783 48793 48797 48798 48846 48849 48934 48965 48969 48975 48985 489951.3088508223161842e-20 6.513807192489934e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/829/5?format=asciiRadioInfrareddefaultJ/ApJ/829/5/table1Full catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNVSSNVSS name (JHHMMSS+DDMMSS) (1)meta.id;meta.maincharRAJ2000NVSS Right Ascension (J2000) (1)degpos.eq.ra;meta.mainDEJ2000NVSS Declination (J2000) (1)degpos.eq.dec;meta.mainGLONGalactic longitude (1)degpos.galactic.lonGLATGalactic latitude (1)degpos.galactic.latdoubleINV[24/9718] NVSS target total intensity (2)mJyphot.flux.density;em.radio.750-1500MHzfloate_INV[1/292] Uncertainty in INVmJystat.errorfloatPNV[0.1/291] NVSS target polarized intensity (2)mJyphot.flux.densityfloate_PNV[0.2/0.6] Uncertainty in PNVmJystat.errorfloatPiNV[0.001/0.16] NVSS fractional polarization (3)phot.flux.densityfloate_PiNV[0.0001/0.02] Uncertainty in PiNVstat.errorfloatf_PiNVUpper limit flag on PiNV: limit=-1; detection=1meta.codeintNVPA? NVSS polarization angle (1)degpos.posAng;phys.polarizationdoublenullablee_NVPA? Uncertainty in NVPA (1)degpos.posAng;phys.polarizationfloatnullablemajaxis[14/127] NVSS fitted deconvolved major axis (1)arcsecphys.angSize.smajAxisfloatf_majaxisUpper limit flag on majaxis: limit=-1; resolved=1 (1)meta.codeintminaxis[13/100] NVSS fitted deconvolved minor axis (1)arcsecphys.angSize.sminAxisfloatf_minaxisUpper limit flag on minaxis: limit=-1; resolved=1 (1)meta.codeintISP[435/10096] S-PASS peak intensitymJyphot.flux.density;em.radio.1500-3000MHzdoublee_ISP[7/18] Uncertainty in ISPmJystat.errorfloatPSP[-1.7/427] S-PASS polarized intensitymJyphot.flux.densityfloate_PSP[0.5/33] S-PASS Uncertainty in PSPmJystat.errorfloatPiSP[0.005/0.3] S-PASS fractional polarization (3)phot.flux.densityfloate_PiSP[0.0002/0.04] Uncertainty in PiSPstat.errorfloatf_PiSPUpper limit flag on PiSP: limit=-1; detection=1meta.codeintSPPA? S-PASS polarization angledegpos.posAng;phys.polarizationdoublenullablee_SPPA? Uncertainty in SPPAdegpos.posAng;phys.polarizationfloatnullablealpha[-1.8/7.5] Spectral index derived from NVSS and S-PASSspect.indexfloate_alpha[0.04/0.07] Uncertainty in alphastat.error;pos.eq.rafloatDepol[0.09/34.2]? Depolarization (4)stat.fit.omcfloatnullablee_Depol[0/7.1]? Uncertainty in Depolstat.errorfloatnullableRMT[-175/218]? Taylor+ 2009, J/ApJ/702/1230, rotation measurerad.m**-2phys.polarization.rotMeasurefloatnullablee_RMT[0.3/18]? Uncertainty in RMT * 1.22rad.m**-2stat.errorfloatnullableRMNS[-167/164]? Rotation measure derived from NVSS and S-PASSrad.m**-2phys.polarization.rotMeasurefloatnullablee_RMNS[0.09/7]? Uncertainty in RMNSrad.m**-2stat.errorfloatnullableDeltaRM[-55/55]? Rotation measure difference; RMNS-RMTrad.m**-2phys.polarization.rotMeasure;arith.difffloatnullablee_DeltaRM[0.4/18]? Uncertainty in DeltaRMrad.m**-2stat.errorfloatnullableMedRMT[-125/92]? Median RMT (5)rad.m**-2phys.polarization.rotMeasurefloatnullableo_MedRMT[12/56]? Number of sources contributed to MedRMTmeta.numberintnullablez[0.004/3.8]? Redshift from Hammond+ 2012arXiv1209.1438Hsrc.redshiftfloatnullableW1mag[4/18]? WISE catalog W1 (3.4 micron) magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.02/0.3]? Uncertainty in W2magmagstat.error;phot.magfloatnullablen_W1mag[4/51]? W1 detection signal to noise ratiostat.snrfloatnullableW2mag[3/17]? WISE catalog W2 (4.6 micron) magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.02/0.4]? Uncertainty in W2magmagstat.error;phot.magfloatnullablen_W2mag[1/56]? W2 detection signal to noise ratiostat.snrfloatnullableW3mag[-0.6/13]? WISE catalog W3 (12um) magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag[0.01/0.6]? Uncertainty in W2magmagstat.error;phot.magfloatnullablen_W3mag[-2/73]? W3 detection signal to noise ratiostat.snrfloatnullableT09Display data from Taylor+, 2009, J/ApJ/702/1230, within 5"meta.ref.urlintnullableWISEDisplay data from Cutri+, 2012, II/311, within 5"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar