J/AJ/154/169ivo://CDS.VizieR/J/AJ/154/169doi:10.26093/cds/vizier.51540169CDSSebastian B.Lal D.V.Rao A.P.2019-02-27T14:35:23Z2018-08-06T08:22:14ZCDS support team

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

cds-question@unistra.frradio-galaxiesradio-continuum-emissionredshiftedWe present results from a study of seven large known head-tail radio galaxies based on observations using the Giant Metrewave Radio Telescope at 240 and 610 MHz. These observations are used to study the radio morphologies and distribution of the spectral indices across the sources. The overall morphology of the radio tails of these sources is suggestive of random motions of the optical host around the cluster potential. The presence of multiple bends and wiggles in several head-tail sources is possibly due to the precessing radio jets. We find steepening of the spectral index along the radio tails. The prevailing equipartition magnetic field also decreases along the radio tails of these sources. These steepening trends are attributed to the synchrotron aging of plasma toward the ends of the tails. The dynamical ages of these sample sources have been estimated to be ~10^8^ yr, which is a factor of six more than the age estimates from the radiative losses due to synchrotron cooling.2017AJ....154..169Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/169CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/120/147 : Radio sources in 14 Abell clusters (Marvel+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/154/169https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/154/169http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/169https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/154/169https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/154/169http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/154/169GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/154/169/table1 (Sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/169/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/169/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/169/table1?GETtext/xml+votable180.050000true14.012125-1.33458330.0055555555555555566/87 1700 1701 5616 18016 19321https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/154/169?format=asciiRadiodefaultJ/AJ/154/169/table1SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharNNumber of measured source properties in Table 2meta.numberintnullableClusterCluster namemeta.id.parentcharz[0.019/0.043]? Redshiftsrc.redshiftfloatnullableRAJ2000? Hour of Right Ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? Degree of Declination (J2000)pos.eq.dec;meta.mainnullableSize[5/15]? Angular sizearcminphys.angSizefloatnullableScale[0.385/0.841]? Linear scale for our adopted cosmologykpc/arcsecinstr.scalefloatnullableDateDate of observationtime.epochnullableDnu[8/32]? Bandwidth {Delta}{nu}MHzinstr.bandwidthintnullablenuCen[240.3/618.3]? Center frequency {nu}_cen_MHzem.freqfloatnullableFluxCFlux density calibratormeta.idcharPhaseCPhase calibratormeta.idcharTon[1.25/6.5]? On-source integration timehtime.expofloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/154/169/table2Distance, Size, Radio Luminosity, and Equipartition Parameters along with Radiative Age for the SourcesNameObject namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDist[0/401.4] Distance from the head along the tailkpcpos.distancefloatV[1e+40/8.2e+69] Cylindrical volume of the regioncm**3phys.volumedoubleLum[1.6e+38/2.2e+40] Radio luminosity (in erg/s)1e-07Wphys.luminosity;em.radiodoublee_Lum[3e+37/5e+39] Uncertainty in Lum (in erg/s)1e-07Wstat.errordoublealpha[-2.31/-0.2] Spectral index ({alpha}) between 242 MHz (or 325 MHz) and 610 MHzspect.indexfloatBmin[0.8/2.6] Minimum magnetic field B_min_muGphys.magFieldfloatUmin[1.1e-14/27.4e-14] Minimum energy density U_min_erg.cm**-3phys.energy.densitydoublee_Umin[1e-15/1.1e-14] Uncertainty in Uminerg.cm**-3stat.errordoublePmin[3e-15/9.1e-14] Minimum pressure P_min_ (in dyne/cm^2^)0.1Paphys.pressure;stat.mindoubleAge[40/58.7] Radiative ageMyrtime.agefloat