J/A+A/661/A40ivo://CDS.VizieR/J/A+A/661/A40doi:10.26093/cds/vizier.36610040CDSSchmitt J.H.M.M.Czesla S.Freund S.Robrade J.Schneider P.C.2022-10-14T13:47:14Z2022-05-18T13:59:48ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsx-ray-sourcesWe present the results of the first X-ray all-sky survey (eRASS1) performed by the eROSITA instrument on board the Spectrum-Roentgen-Gamma (SRG) observatory of the Sco-Cen OB association. Bona fide Sco-Cen member stars are young and are therefore expected to emit X-rays at the saturation level. By cross-correlating the eRASS1 source catalog with the Gaia EDR3 catalog, we arrive at a complete identification of the stellar (i.e., coronal) source content of eROSITA in the Sco-Cen association, and in particular obtain for the first time a 3D view of the detected stellar X-ray sources. Focusing on the low-mass population and placing the optical counterparts identified in this way in a color-magnitude diagram, we can isolate the young stars out of the detected X-ray sources and obtain age estimates of the various Sco-Cen populations. A joint analysis of the 2D and 3D space motions, the latter being available only for a smaller subset of the detected stellar X-ray sources, reveals that the space motions of the selected population show a high degree of parallelism, but there is also an additional population of young, X-ray emitting and essentially cospatial stars that appears to be more diffuse in velocity space. Its nature is currently unclear. We argue that with our procedures, an identification of almost the whole stellar content of the Sco-Cen association will become possible once the final Gaia and eROSITA catalogs are available by the end of this decade.2022A&A...661A..40Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/661/A40CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/661/A1 : The eFEDS X-ray catalogs (V7.4) (Brunner+, 2022)J/A+A/661/A2 : Galaxy clusters and groups in eFEDS (Liu+, 2022)J/A+A/661/A3 : eFEDS counterparts to point-like sources (Salvato+, 2022)J/A+A/661/A4 : eFEDS optical cluster and group catalog (Klein+, 2022)J/A+A/661/A5 : The eFEDS AGN catalog (Liu+, 2022)J/A+A/661/A7 : X-ray properties of eFEDS clusters and groups (Bahar+, 2022)J/A+A/661/A8 : eFEDS catalogue of variable X-ray sources (Boller+, 2022)J/A+A/661/A10 : eFEDS galaxy clusters and groups in disguise (Bulbul+, 2022)J/A+A/661/A23 : Exoplanet X-ray irradiation & evaporation rates (Foster+, 2022)J/A+A/661/A24 : Corona-chromosphere connection (Fuhrmeister+, 2022)J/A+A/661/A29 : First eROSITA study of nearby M dwarfs (Magaudda+, 2022)J/A+A/661/A34 : eta Cha cluster eROSITA X-ray scan (Robrade+, 2022)J/A+A/661/A35 : eROSITA study of 47 Tuc globular cluster (Saeedi+, 2022)J/A+A/661/A38 : SRG/ART-XC 1st year all-sky X-ray survey (Pavlinsky+, 2022)J/A+A/661/A44 : A first eROSITA view of ultracool dwarfs (Stelzer+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/661/A40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/661/A40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/661/A40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/661/A40https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/661/A40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/661/A40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/661/A40/tablea1 (Sco-Cen membership list with X-ray properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/661/A40/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/661/A40/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/661/A40/tablea1?GETtext/xml+votable180.050000true239.68501901025883-13.1076084621133990.0055555555555555564/2325 2327 2368 2370 2373 2600 2602 2606 2623 2651 2663 2666 2668 2682 2686 2688 2691 2693 2695-2697 2699-2700 2704 2709 2711-2712 2721 2768-2769 2772 5/7306 7330 9287 9293 9295 9297-9299 9305-9307 9317-9319 9328-9329 9332 9478 9486 9489-9491 9497-9498 9500 9536 9540 9544 9546-9549 9553 10375 10377 10379-10380 10382 10386 10394 10404-10405 10412 10414 10416-10418 10423 10428 10431 10458 10460 10464-10466 10471-10474 10476-10477 10479 10482 10484 10486 10488 10490-10491 10555 10557-10559 10602-10603 10625-10626 10629-10631 10633 10638 10640 10642 10644 10646-10647 10650-10651 10657-10659 10662-10663 10668-10669 10671 10676 10678 10681-10685 10689-10690 10692 10694-10697 10700-10702 10704 10706 10714 10718-10720 10722-10724 10726-10727 10734-10736 10738-10742 10750 10757-10761 10763 10768 10770-10771 10777-10779 10792-10793 10795 10805-10810 10813-10815 10820 10822-10823 10825-10826 10832 10834-10835 10840 10842-10843 10852-10854 10856-10858 10860-10861 10864-10865 10867-10869 10881-10883 10888 10890 10896-10898 10915 10920 11008 11011-11013 11015-11016 11018-11021 11025-11027 11029 11031-11033 11036 11086 11092 11094 11096-11097 11100-11101 11105 11120 6/29228 29230 29312-29314 29316 29324 29344 29346-29348 29350 29352-29354 29356 30721-30722 30726 30728 30755 30762 30857 37141 37143 37171 37177-37179 37185-37187 37217-37218 37264-37265 37267 37296-37297 37300-37301 37320-37322 37324-37326 37333 37335-37337 37339-37341 37905 37907-37909 37911 37917 37919 37938-37939 37941-37943 37948-37949 37951-37952 37954-37955 37985-37987 37996-37998 38007-38009 38013 38015 38017-38022 38024-38025 38028-38029 38033-38037 38081-38085 38096 38100 38148-38149 38151-38152 38154-38156 38158-38159 38164-38166 38168 38170-38172 38174-38175 38181-38183 38201-38204 38208-38210 38217 38221-38226 38228-38229 38232-38234 38240 38243 38246-38249 38251-38252 38256 38273 41195-41196 41198 41491 41493-41495 41498-41499 41507 41513-41515 41526 41532 41534-41537 41541-41542 41548-41550 41552 41562 41568-41569 41571 41574-41575 41580 41583 41593 41625-41626 41628-41629 41631 41654 41660-41662 41677-41680 41682-41683 41686-41688 41690-41691 41717-41721 41723 41770 41772 41775 41779 41781 41783-41785 41789 41791 41805-41806 41814-41816 41819-41822 41825 41827-41830 41836-41838 41844 41849-41851 41853 41855 41868-41869 41871 41874 41877 41880-41881 41883 41900 41902-41903 41914-41915 41922 41925 41927 41932 41934-41935 41940 41942-41943 41949-41951 41958-41959 42171-42174 42214 42217-42219 42226 42379 42382-42383 42394-42397 42399 42401-42405 42407 42440-42441 42443-42444 42446 42464-42465 42467-42468 42470 42474 42476 42497-42499 42508-42510 42512 42514-42515 42528 42530 42536 42538-42539 42541-42545 42547 42549 42557 42559 42565-42567 42572-42574 42580 42582-42583 42593-42596 42598-42599 42624 42626-42627 42640-42641 42643-42646 42681-42683 42708-42710 42716 42718-42722 42746-42750 42753-42754 42764 42766 42773-42775 42792-42794 42796-42798 42812-42813 42815 42848-42849 42854 42860 42862-42863 42866 42884-42886 42901 42903 42929-42934 42949-42951 42972-42973 42975 42992 42994-42995 42997-42999 43004 43006 43024 43026-43027 43048-43049 43051 43076-43077 43079 43105-43107 43176-43177 43179 43216 43218-43219 43245-43248 43251 43284-43285 43287 43296 43298-43299 43308 43310-43311 43313-43317 43319 43321-43324 43326-43327 43332-43334 43364-43365 43367 43420-43422 43436-43438 43448-43450 43452-43454 43464-43466 43480 43483-43485 43487-43488 43491 43493 43496 43520 43522-43523 43556-43558 43565-43566 43569-43572 43574-43578 43580-43581 43596-43598 43601-43603 43608 43616-43617 43619 43648 43650 43653 43655-43658 43664-43666 43672 43684 43690 43780 43782-43783 43794 43796 44036 44038-44041 44043 44056-44058 44068-44069 44088 44090-44092 44094 44096-44097 44099 44113-44115 44120-44121 44123 44136-44137 44139-44141 44149 44151 44153 44156 44161-44164 44166 44176-44177 44320-44321 44324 44326-44327 44329 44331-44334 44337-44341 44343 44348-44349 44372 44375 44380-44381 44392 44394 44396-44397 44399 44408 44410 44419 44432 44435 44437-44440 44444-44445 44484-44486 44488 44497-44498 44500-44501 44508-44509https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/661/A40?format=asciiX-raydefaultJ/A+A/661/A40/tablea1Sco-Cen membership list with X-ray propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEROeROSITA designation, 1eRASS JHHMMSS.s+DDMMSSmeta.idcharGaiaEDR3Gaia EDR3 designationmeta.idRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainMatchdist[0.03/19.31] Matching distance between eROSITA and Gaia sourcesarcsecpos.angDistancedoubleSprob[0/1] Stellar probabilitystat.fit.goodnessdoubleCRateeRASS1 count ratect/sphot.count;em.X-raydoubleGroup[LCC UCL US] Membership code (1)meta.code.memberchar