J/ApJ/694/992ivo://CDS.VizieR/J/ApJ/694/992doi:10.26093/cds/vizier.16940992CDSLin Y.-T.Partridge B.Pober J.C.El Bouchefry K.Burke S.Klein J.N.,Coish J.W.Huffenberger K.M.2017-10-16T14:58:36Z2011-04-07T09:14:07ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradio-continuum-emissionspectral-energy-distributionTo explore the high-frequency radio spectra of galaxies in clusters, we used NRAO's Very Large Array at four frequencies, 4.9-43GHz, to observe 139 galaxies in low redshift (z<0.25), X-ray detected, clusters. The clusters were selected from the survey conducted by Ledlow and Owen (1997ApJS..108...41O), who provided redshifts and 1.4GHz flux densities for all the radio sources. We find that more than half of the observed sources have steep microwave spectra as generally expected ({alpha}<-0.5, in the convention S{proto}{nu}^{alpha}^). However, 60%-70% of the unresolved or barely resolved sources have flat or inverted spectra. Most of these show an upward turn in flux at {nu}>22GHz, implying a higher flux than would be expected from an extrapolation of the lower-frequency flux measurements. Our results quantify the need for careful source subtraction in increasingly sensitive measurements of the Sunyaev-Zel'dovich effect in clusters of galaxies (as currently being conducted by, for instance, the Atacama Cosmology Telescope and South Pole Telescope groups).2009ApJ...694..992Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/694/992CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/376/1073 : Sunyaev-Zel'dovich effect in galaxy clusters (Zemcov+, 2007)J/A+A/417/827 : Relativistic corrections to Sunyaev-Zeldovich effect (Itoh+,J/A+A/402/37 : UV to radio SED of galaxies in Virgo cluster (Boselli+,J/AJ/110/1959 : VLA survey of Abell clusters. V. (Ledlow+ 1995)J/AJ/109/853 : VLA survey of Abell clusters. IV. (Ledlow+ 1995)J/AJ/105/853 : Energy distributions of radio galaxies (Impey+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/694/992https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/694/992http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/694/992https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/694/992https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/694/992http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/694/992GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/694/992/table3 (Cluster radio sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/694/992/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/694/992/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/694/992/table3?GETtext/xml+votable180.050000true9.7842-22.33380.0055555555555555566/2164 2432 4317 5005 5438 5585 5616 5618 6002 7026 7329 7516 7639 7781 8220 8223 8264 8266 8271 8515 8520 8526 8608 8735 8788 8923 9040 9048 9052 9088 9332 9354 9368 9468 9508 9531 9750 9997 10271 10312 10379 10664 10899 11132 11195 11239 11254 11419 11591 11932 11943 11957 12010 12121 12123 16056 16096 16120 16306 16693 16696 16713 17141 17237 17571 17662 18016 18113 18272 18324 18411 18607 18625 19314 19501 19783 19797 19798 19905 19912 19930 19935 19993 20021 20083 20280 20308 20355 20361 21156 22577 25981 26109 26903 27486 27654 27736 27962 27966 28005 28181 28249 28414 28415 28467 28471 36062 36661 48447 48594 489669.276497240453405e-25 5.963462613277208e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/694/992?format=asciiRadiodefaultJ/ApJ/694/992/table3Cluster radio sourcesl_FKLimit flag on FKmeta.code.errorcharl_aKQLimit flag on aKQmeta.code.errorcharFK? VLA K channel flux density (22.4GHz)mJyphot.flux.density;em.radio.12-30GHzfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[LO95]Source name (1)meta.id;meta.maincharm_[LO95]? Source componentmeta.code.multipfloatnullableTypeMorphological indication (2)meta.code;src.morphcharzRedshift taken from Owen & Ledlow (1997ApJS..108...41O)src.redshiftfloatFL1.4GHz flux (L-band) from Owen & Ledlow (1997ApJS..108...41O)mJyphot.flux.density;em.radio.750-1500MHzintl_FCLimit flag on FCmeta.code.errorcharFC? VLA C channel flux density (4.9GHz)mJyphot.flux.density;em.radio.3-6GHzfloatnullableu_FC[:] Uncertainty flag on FCmeta.code.errorchare_FC? FC uncertaintymJystat.errorfloatnullablel_FXLimit flag on FXmeta.code.errorcharFX? VLA X channel flux density (8.5GHz)mJyphot.flux.density;em.radio.6-12GHzfloatnullableu_FX[:] Uncertainty flag on FXmeta.code.errorchare_FX? FX uncertaintymJystat.errorfloatnullableu_FK[:] Uncertainty flag on FKmeta.code.errorchare_FK? FK uncertaintymJystat.errorfloatnullablel_FQLimit flag on FQmeta.code.errorcharFQ? VLA Q channel flux density (43.3GHz)mJyphot.flux.density;em.mm.30-50GHzfloatnullableu_FQ[:] Uncertainty flag on FQmeta.code.errorchare_FQ? FQ uncertaintymJystat.errorfloatnullablel_aCXLimit flag on aCXmeta.code.errorcharaCX? CX spectral index ({alpha}_CX_)spect.indexfloatnullablel_aXKLimit flag on aXKmeta.code.errorcharaXK? XK spectral indexspect.indexfloatnullableaKQ? KQ spectral index ({alpha}_KQ_)spect.indexfloatnullableFCX? Predicted flux at 90GHz based on the fluxes at C and X bands and {alpha}_CX_mJyphot.flux.density;em.mm.50-100GHzfloatnullableFKQ? Predicted flux at 90GHz based on the fluxes at K and Q bands and {alpha}_KQ_mJyphot.flux.density;em.mm.50-100GHzfloatnullableLO95VDisplay the VLA survey of Abell clusters data (Ledlow et al. 1995, Cat. J/AJ/110/1959meta.ref.urlcharSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main