J/ApJS/278/36ivo://CDS.VizieR/J/ApJS/278/36CDSGoodwin A.J.Burn M.Anderson G.E.Miller-Jones J.C.A.Grotova I.,Baldini P.Liu Z.Malyali A.Rau A.Salvato M.2026-05-13T08:56:20Z2026-05-13T09:54:06ZCDS support team

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

cds-question@unistra.frtransient-sourcesx-ray-sourcesradio-continuum-emissionWe present a systematic analysis of the radio properties of an X-ray-selected sample of tidal disruption event (TDE) candidates discovered by the eROSITA telescope. We find radio sources coincident with half of the transient events (11 TDEs), with eight radio sources showing statistically significant variability over a 6 month period. We model the radio spectra of six sources with sufficiently bright radio emission and find the sources show radio spectra consistent with optically thin synchrotron emission and radio outflow minimum radii of 10^16^-10^17^cm, velocities 0.01c-0.05c, and energies 10^48^-10^51^erg. On comparison with the radio properties of an optically selected TDE sample at similar late times, we find no significant difference in the radio luminosity range or radio detection rate. We find a tentative positive trend with peak radio and X-ray luminosity, but require further observations to determine if this is real or due to observational bias due to the large range in distances of the events. Interestingly, none of the X-ray-selected events show late-rising radio emission, compared to 45% of radio-detected sources of an optically selected sample that showed late-rising radio emission. We propose that this may indicate that many TDEs launch radio outflows at or near peak X-ray luminosity, which can be significantly delayed from peak optical luminosity. This study presents the first systematic analysis of the radio properties of an X-ray-selected sample of TDEs, and gives insight into the possible link between the physical processes that power X-ray and radio emission in TDEs.2025ApJS..278...36Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/278/36CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/356/445 : ROSAT-FIRST AGN correlation (Brinkmann+, 2000)J/ApJS/133/77 : VLA radio continuum survey of Seyfert galaxies (Ho+, 2001)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/A+A/672/A167 : eRASSt J234402.9-352640 optical photometry (Homan+, 2023)J/other/PASA/41.3 : Rapid ASKAP Cont. Survey. V. 1367.5MHz (Duchesne+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/278/36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/278/36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/278/36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/278/36https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/278/36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/278/36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/278/36/table1 (The eROSITA TDE candidates in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/278/36/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/278/36/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/278/36/table1?GETtext/xml+votable180.050000true18.6285924-59.6151770.0055555555555555566/4168 4713 16425 21977 26450 26915 33134 34880 35211 36238 36905 37420 38936 39563 41270 44201 44226 44236 44659 44892 45879 47208https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/278/36?format=asciiX-rayRadiodefaultJ/ApJS/278/36/table1The eROSITA TDE candidates in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinteRASStSource namemeta.id;meta.maincharprimaryRAJ2000[18.6/356.1] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-84.4/19.5] Declination (J2000)degpos.eq.dec;meta.mainz[0.017/0.33] Redshiftsrc.redshiftfloate_z[0.02/0.09]? Lower uncertainty on zstat.error;stat.min;src.redshiftfloatnullableE_z[0.06/0.23]? Upper uncertainty on zstat.error;stat.max;src.redshiftfloatnullablef_zFlag on z (1)meta.code;src.redshiftcharNobsNumber of ATCA observations for this source (link to Table 2)meta.numberintnullableJ/ApJS/278/36/table2ATCA radio observations of each of the 22 TDE candidates in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinteRASStSource namemeta.id;meta.maincharObs[2022/2024] Year of the epoch observationtime.epochDeltat[668/1720] Time from peak eROSITA X-ray flux measurementdtime.epochintFreq[2.1/9.5] FrequencyGHzem.freqfloatl_FluxLimit flag on Fluxmeta.code.error;phot.fluxcharFlux[29/1047] Flux density at FrequJyphot.flux.density;em.radiofloate_Flux[5/62]? Uncertainty in FluxuJystat.error;phot.flux;em.radiointnullable