J/AJ/168/288ivo://CDS.VizieR/J/AJ/168/288doi:10.26093/cds/vizier/be-58-90CDSAyanabha D.Narang M.Puravankara M.Shridharan B.Tyagi H.,Banerjee B.Nayak P.K.Surya A.2026-07-02T11:45:10Z2025-09-17T13:05:46ZCDS support team

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

cds-question@unistra.frradio-continuum-emissionradio-sourcesastronomical-object-identificationradio-astronomyastrometryvisible-astronomyphotometryIn this work, we have carried out a systematic analysis of the Very Large Array Sky Survey (VLASS) quick look catalogs together with Gaia DR3 to identify the optical counterparts of 3GHz radio emitters within 500pc to obtain a homogeneous statistical sample of stellar radio sources. We have identified distinct populations of 3GHz emitters across the Gaia DR3 color-magnitude diagram. We also present candidate sources (transient, highly variable, or background artifacts) that can be confirmed by follow-up observations. A majority of the detected sources constitute main-sequence G-, K-, and M-type stars, including ultracool dwarfs. Pinning down the origin of radio emission from these populations can help us gain further insights into the origin of stellar and planetary magnetic fields. By analyzing the variation of brightness temperature of the sources with their spectral type, we have tentatively associated possible emission mechanisms with different object types. We inspected the correlation between quiescent radio and X-ray emission for our sample, which can provide crucial insights into the current understanding of the Gudel-Benz relationship, which is essential for modeling steady radio emission and coronal heating. This VLASS-Gaia DR3 analysis acts as a pilot study for follow-up observations at multiple wavelengths to better understand stellar structure, model flaring activities, and detect radio emission caused by star-planet interactions.2024AJ....168..288Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/288CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/simbad : Simbad objects catalogue (M.Wenger 2000)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)IX/69 : XMM-Newton Serendipitous Source Cat. 4XMM-DR13 (Webb+, 2023)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/A+AS/124/259 : Westerbork Northern Sky Survey I. (Rengelink+ 1997)J/ApJ/701/535 : A sample of candidate radio stars (Kimball+, 2009)J/A+A/549/A131 : Radio survey of ultracool dwarfs (Antonova+, 2013)J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)J/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)J/AJ/154/224 : Transiting planets in young clusters from K2 (Rizzuto+, 2017)J/A+A/598/A104 : LOFAR Two-metre Sky Survey (Shimwell+, 2017)J/A+A/612/A96 : Spect. survey of youngest field stars II. (Frasca+, 2018)J/ApJ/859/33 : GOBELINS. IV. VLBA obs. of Taurus (Galli+, 2018)J/MNRAS/489/437 : Origin of stellar flares on M dwarfs with TESS (Doyle+, 2019)J/A+A/649/A6 : Gaia Cat. of Nearby Stars - GCNS (Gaia collaboration, 2021)J/other/PASA/41.84 : Sydney Radio Star Catalogue (Driessen+, 2024)http://cirada.ca/vlasscatalogueql0 : VLASS Quick Look & Single Epoch Cat.https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/288https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/288http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/288https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/288https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/288http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/288GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/288/table1 (Very Large Array Survey, Gaia DR3 coordinates, and photometric information for radio sources analyzed in this study along with their classified category)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/288/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/288/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/288/table1?GETtext/xml+votable180.050000true295.961364313853.62770730170.0055555555555555566/12 31 63 202 225 233 280 325 342 377 396 462 493 609 621 845 862 882 924 999 1021 1027 1031 1054 1077 1080 1089 1098 1114 1149 1152 1159 1168-1169 1174 1202 1215 1232 1234 1244 1291 1327 1344 1397 1412 1449 1505 1516 1526 1539 1556 1605 1725 1781 1799 1861 1993 2075 2171 2339 2552 2805 2840 2865 2936 2966 3081 3127 3280 3286 3331 3460 3688 3721 3732 3763 3849 3900 4031 4101 4190 4280 4396 4716 4887 4990 5006 5028 5285 5368 5428 5628 5818 5950 6058 6113 6122 6189 6241 6425 6563 6685 6907 6951 6995 7064 7095 7110 7136 7147 7204 7273 7289 7561 7684 7728 7757 7926 7988 8166 8275 8369 8378 8458 8584 8621 8723 8758 8794 8944 9115 9117-9118 9121 9135 9150 9196 9300 9365 9442 9506 9581 9974 10017 10049 10055 10062 10156 10194 10255 10382 10415 10481 10490 10551 10599 10651 10783 10847 11048 11067 11255 11543 11577 11624 11645 11654 11735 11764 11866 11962 12053 12093 12157 12184 12447 12473 12511 12523 12716 12754 12795 12846 12856 12957 13001 13032 13040 13050 13110 13130 13150 13158 13174 13180 13196 13214 13261 13338 13442 13451 13462 13538 13603 13609 13670 13672 13741 13778 13802 13845 13933 13947 13984 14035 14076 14122 14191 14221 14255 14311 14406 14502 14512 14567 14679-14680 14718 14750 14790 14855 14858 14950 15135 15165 15187 15219 15243 15274 15368 15413 15475 15582 15698 15703 15725 15965 15968 16034 16197 16206 16271 16338 16344 16365 16369 16590 16677 16707 17058 17169 17175 17989 18007 18234 18246 18440 18538 18553 18746 18759 18889 18929 19016 19144 19258 19355 19371 19446 19752 19775 19835 20071 20209 20229 20263 20286 20327 20460 20590 20645 20653 20700 20749 20806 20854 20922 20952 20983 21051 21125 21176 21239 21310 21316 21345 21370 21389 21438 21464 21501 21548 21729 21731 21778 21893 21997 22052 22066 22097 22175-22176 22186 22413 22680 22689 22707 22773 22790 22805 22815 22828 22849 22854 22866 22873 22875 22884 22939 22978 22990 23191 23265 23517 23549 23579 23680 23720 23743 23799 23885 23980 24083 24117 24146 24159 24190 24201 24203 24212 24238-24240 24273 24281 24336 24476 24481 24549 24696 25070 25347 25452 25456 25499 25507 25549 25745 25826 25828 26008 26057 26095 26101 26358 26482 26509 26558 26577 26701 26956 27089 27152 27520 27572 27602 27787 27833 28428 28730 28745 28875 28924 28968-28969 29009 29018 29025 29189 29219 29253 29257 29296 29322 29374 29427 29503 29569 29574 29601 29718 29747 29810 29867 29880 29882 29906 29929 30029 30085 30167 30181 30231 30251 30363 30366 30384 30461 30617 30707 30711 30767 30855 30864 30968 30971 31094 31164 31183 31243 31281 31356 31569 31591 31632 31752 31778 31908 31936 31971 31975 31989 31993 32169 32211 32278 32300 32329 32399 32516 32617 32622 34266 34413 34650 34684 34733 34770 35187 35319 35444 35587 36181 36279 36346 38359 38604 38703 39409 39698 39720 39867 39877 39995 40131 40321 40627 40699 40701 40724 40814 40904 40916 42420 42437 42493 42683 42903 42929 42932 42945 42951-42953 42958 42962 42970 42980-42981 42983 42986 42989 42994 43000 43003 43509 43847 43950 44039 44055 44113 44307 44310 44316-44318 44324 44360-44361 44368 44378-44379 44382 44387 44400 44445 44455 44458 44612 44658 44731 44743 44751 44777 44850 44854 44894 44993 45005 45016 46922 46944 47920 48001 48035 48072 48097 48122 48137 48163 48228 48263 48325 48392 48543 48553 48589 48606 48648 48685 48859 490781.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/288?format=asciiOpticalRadiodefaultJ/AJ/168/288/table1Very Large Array Survey, Gaia DR3 coordinates, and photometric information for radio sources analyzed in this study along with their classified categoryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 identifier (I/355)meta.id;meta.mainRAJ2000VLASS right ascension (J2000)degpos.eq.raDEJ2000[-40/85.5] VLASS declination (J2000)degpos.eq.decRAJ2016Gaia DR3 right ascension (ICRS)degpos.eq.raDEJ2016[-40/85.5] Gaia DR3 declination (ICRS)degpos.eq.decGmag[2.8/20.1] Gaia DR3 G band (673nm) magnitudemagphot.mag;em.opt.VfloatBP-RP[-0.3/5.2]? Gaia DR3 (Blue-Red) passband colormagphot.color;em.opt.B;em.opt.RfloatnullableDist[5.6/498.4] Distancepcpos.distancefloatFlux1[0/54.3] First epoch flux density (2-4GHz)mJy/beamphot.flux.density;em.radio.1500-3000MHzfloatFlux2[0/109.1] Second epoch flux density (2-4GHz)mJy/beamphot.flux.density;em.radio.1500-3000MHzfloatSimbadSimbad identifiermeta.idcharTypeSimbad object type (1)src.classcharCategoryCategory (2)src.classchar_RAPositions from Gaia DR3 (I/355) at Epoch J2000 (right ascension part)degpos.eq.ra;meta.main_DEPositions from Gaia DR3 (I/355) at Epoch J2000 (declination part)degpos.eq.dec;meta.main