J/other/AstBu/78ivo://CDS.VizieR/J/other/AstBu/78.443doi:10.26093/cds/vizier/dv/hikeedCDSKhabibullina M.Mikhailov A.Sotnikova Yu.Mufakharov T.Mingaliev M.,Kudryashova A.Bursov N.Stolyarov V.Udovitskij R.2026-03-17T20:08:00Z2024-02-02T11:09:37ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsradio-galaxiesactive-galactic-nucleiradio-continuum-emissionStudy of high-redshift radio galaxies (HzRGs) can shed light on the active galactic nuclei (AGNs) evolution in massive elliptical galaxies. The vast majority of observed high-redshift AGNs are quasars, and there are very few radio galaxies at redshifts z>3. We present the radio properties of 173 sources optically identified with radio galaxies at z>1 with flux densities S_1.4_>20mJy. Literature data were collected for compilation of broadband radio spectra, estimation of radio variability, radio luminosity, and radio loudness. Almost 60% of the galaxies have steep or ultra-steep radio spectra; 22% have flat, inverted, upturn, and complex spectral shapes, and 18% have peaked spectra (PS). The majority of the PS sources in the sample (20/31) are megahertz-peaked spectrum sources candidates, i.e. possibly very young and compact radio galaxies. The median values of the variability indices at 11 and 5GHz are V_S11_=0.14 and V_S5_=0.13, which generally indicates a weak or moderate character of the long-term variability of the studied galaxies. The typical radio luminosity and radio loudness are L5 =10^43^-10^44^erg/s and logR=3-4 respectively. We have found less prominent features of the bright compact radio cores for our sample compared to high-redshift quasars at z>3. The variety of the obtained radio properties shows the different conditions for the formation of radio emission sources in galaxies.2023AstBu..78..443Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/AstBu/78.443CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toftp://cats.sao.ru/pub/CATS/RGLIST : CATS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/AstBu/78.443https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/AstBu/78.443http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/AstBu/78.443https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/AstBu/78.443https://vizier.iucaa.in/viz-bin/votable?-source=J/other/AstBu/78.443http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/AstBu/78.443GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/AstBu/78.443/table1 (The parameters of the galaxies in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/AstBu/78.443/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/AstBu/78.443/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/AstBu/78.443/table1?GETtext/xml+votable180.050000true7.522708329.95188890.0055555555555555566/28 1450 4120 4652 4752 4805 4829 4841 4882 4948 5048 5108 5234 5351 5362 5392 5432 5448 5615 5617 5737 5751 5758 5775 5803 5821 5866 5914 6127 6232 6399 6477 6488 6551-6552 6587 7185 7192-7194 7310 7343 7348 7360 7500 8216 8327 8393 8415 8426 8556 8626 8711 8735 8759 8981 9030 9394 9403 9785 9791 9816 9825 9856 9932 10040 10137 10229 10260 10529 10531 10605 10821 10906 11014 11152 11267 11377 11417 11520 11652 11785 11943 12094 12338 12693 13074 13572 15823 16722 17283 17521 17601 17664 17964 18007 18014 18290 18408 18913 19032 19137 19184 19723 19798 20006 20122 20313 20413 21016 22375 23416 25281 25839 25929 25966 25971 25979 26048 26050 26093 26207 26447 26618 26969 26972 26989 27044 27102 27194 27241 27256 27366 27423 27478 27495 27521 27538 27663 27675 27908 28043 28102 28108 28376 28580 30064 31335 31423 31618 31696 32338 32490 35768 35788 35935 36042 36392 36601 36792 36794 38741 38829 40527 43982 45051 46831 47049 48319 48347 48714 488779.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/AstBu/78.443?format=asciiRadiodefaultJ/other/AstBu/78.443/table1The parameters of the galaxies in the sampleNameNVSS Name (HHMMSS+DDMMSS J2000)meta.id;meta.maincharzSpectroscopic redshift (1)src.redshiftfloatS1.41.4GHz flux density of source (NVSS)Jyphot.flux.density;em.radio.750-1500MHzfloate_S1.4rms uncertainty on flux density at 1.4GHzJystat.errorfloatTypeType of host object (2)src.classcharRefLiterature where the optical classification was taken in refs.dat filemeta.bibchar_RAPositions from NVSS (right ascension part)degpos.eq.ra;meta.main_DEPositions from NVSS (declination part)degpos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/other/AstBu/78.443/table2The radio properties of the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNVSS name (JHHMM+DDMM, J2000)meta.id;meta.maincharlogL5? Log of radio luminosity at 5CHzlog(1e-07W)phys.luminosity;em.radiofloatnullableE_logL5? rms (plus) uncertainty on log radio luminosity at 5CHzlog(1e-07W)stat.error;stat.maxfloatnullablee_logL5? rms (minus) uncertainty on log radio luminosity at 5CHzlog(1e-07W)stat.errorfloatnullablelogR1? Logarithm of radio loudness, calculated in 1 wayphot.flux;arith.ratiofloatnullableE_logR1? rms (plus) uncertainty on logarithm of radio loudness, calculated in 1 waystat.error;stat.maxfloatnullablee_logR1? rms (minus) uncertainty on logarithm of radio loudness, calculated in 1 waystat.errorfloatnullablelogR2? Logarithm of radio loudness, calculated in 2 wayphot.flux;arith.ratiofloatnullableE_logR2? rms (plus) uncertainty on logarithm of radio loudness, calculated in 2 waystat.error;stat.maxfloatnullablee_logR2? rms (minus) uncertainty on logarithm of radio loudness, calculated in 2 waystat.errorfloatnullablealphalow? Spectral indices calculated for the frequencies lower than the point where the spectral slope changes its sign from positive to negativespect.indexfloatnullablee_alphalow? rms uncertainty on {alpha}_lowstat.errorfloatnullablealphahigh? Spectral indices calculated for the frequencies higher than the point where the spectral slope changes its sign from negative to positivespect.indexfloatnullablee_alphahigh? rms uncertainty on {alpha}_highstat.errorfloatnullableSpType? Radio spectrum typemeta.notecharM5? Modulation indexsrc.var.indexfloatnullableV5? Variability indexsrc.var.indexfloatnullableNobs? Number of observationsmeta.numberintnullablenupeakobs? The observed peak frequency in the spectrumem.freq;stat.maxfloatnullableJ/other/AstBu/78.443/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.note;meta.maincharprimaryBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar