J/PASP/137/A4201ivo://CDS.VizieR/J/PASP/137/A4201doi:10.26093/cds/vizier.61374201CDSRodriguez A.C.El-Badry K.Suleimanov V.Pala A.F.Kulkarni S.R.,Gaensicke B.Mori K.Rich R.M.Sarkar A.Bao T.Lopes de Oliveira R.,Ramsay G.Szkody P.Graham M.Prince T.A.Caiazzo I.Vanderbosch Z.P.,van Roestel J.Das K.K.Qin Y.-J.Kasliwal M.M.Wold A.Groom S.L.,Reiley D.Riddle R.2025-09-09T14:15:27Z2025-03-03T09:35:54ZCDS support team

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

cds-question@unistra.frx-ray-sourcesmultiple-starsvariable-starsvisible-astronomyWe present volume-limited samples of cataclysmic variables (CVs) and AM CVn binaries jointly selected from SRG/eROSITA eRASS1 and Gaia DR3 using an X-ray + optical color-color diagram (the "X-ray Main Sequence"). This tool identifies all CV subtypes, including magnetic and low-accretion rate systems, in contrast to most previous surveys. We find 23 CVs, 3 of which are AM CVns, out to 150 pc in the Western Galactic Hemisphere. Our 150 pc sample is spectroscopically verified and complete down to LX=1.3x10^29^erg/s in the 0.2-2.3keV band, and we also present CV candidates out to 300pc and 1000pc. We discovered two previously unknown systems in our 150pc sample: the third nearest AM CVn and a magnetic period bouncer. We find the mean LX of CVs to be <LX>~4.6x10^30^erg/s, in contrast to previous surveys which yielded <LX>~10^31^-10^32^erg/s. We construct X-ray luminosity functions that, for the first time, flatten out at LX~10^30^erg/s. We infer average number, mass, and luminosity densities of {rho}_N,CV_=(3.7+/-0.7)x10^-6^pc^-3^, {rho}_M_=(5.0+/-1.0)x10^-5^M_{sun}_^-1^, and {rho}_LX_=(2.3+.-0.4)x10^26^erg/s/M_{sun}_, respectively, in the solar neighborhood. Our uniform selection method also allows us to place meaningful estimates on the space density of AM CVns, {rho}_N,AM-CVn_=(5.5+/-3.7)x10^-7^pc^-3^. Magnetic CVs and period bouncers make up 35% and 25% of our sample, respectively. This work, through a novel discovery technique, shows that the observed number densities of CVs and AM CVns, as well as the fraction of period bouncers, are still in tension with population synthesis estimates.2025PASP..137a4201Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/137/A4201CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/A+A/682/A34 : SRG/eROSITA all-sky survey catalogs (eRASS1) (Merloni+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/137/A4201https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/137/A4201http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/137/A4201https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/137/A4201https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/137/A4201http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/137/A4201GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/137/A4201/cv_300 (Catalog of candidate CVs and AM CVns out to 300c)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/137/A4201/cv_300?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/137/A4201/cv_300?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/137/A4201/cv_300?GETtext/xml+votable180.050000true1.6399901096722-69.00991661176970.005555555555555556Cone search capability for table J/PASP/137/A4201/cv_1000 (Catalog of candidate CVs and AM CVns out to 1000pc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/137/A4201/cv_1000?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/137/A4201/cv_1000?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/137/A4201/cv_1000?GETtext/xml+votable180.050000true0.5319210560174-37.82225660892690.0055555555555555566/4144 4173 4196 4348 4453 4515 4607 4664 4723 4740 4790 4859 4988 5025 5036 5062 5115 5120 5210 5345 5634 5650 6223 6314 6671 16394 16396 20496 20604 20618 20653 20773 20825 20847 20894 20940 20943 21004 21036 21370 21439 21517 21567 21601 21603 21607 21634 21657 21678 21773 21822-21823 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34139 34161 34198 34208 34341 34357 34437 34548 34558 34655 34658 34691 34697 34714 34789 34864 34877 34902 34907 34950 34955 34961 34977 35077 35081 35165 35170 35181 35198 35206 35253 35333 35341 35766 35824 35847 35935-35936 35957 36008 36088 36129 36152 36180-36181 36221 36234 36293 36306 36308 36359 36381 36422 36490 36636 36707 36721 36743 36910 36966 36980 37000 37018 37022 37026 37076 37101-37102 37125 37127 37135 37148 37150 37252 37261 37267 37278 37438 37441 37522 37528 37555-37556 37560 37567 37578 37582 37622 37648 37746 37784 37827 37838 37851 37868 37894 37911 37961 37968 38002 38056 38076-38077 38089 38091 38101 38120 38153 38156 38181 38188 38270 38285 38292 38296 38308 38317 38348 38351 38421 38440 38445 38456 38507 38513 38565 38591 38594 38600 38675 38694 38715 38733 38792 38818 38823 38827 38919 38947 38982 38985 38996 39148 39192 39206 39223 39249 39253 39272 39397 39428 39443 39489 39517 39527 39591 39595 39616 39618 39631 39677 39714 39779 39984 40013 40059 40075 40081 40095 40102 40113 40131 40165 40173 40187 40201 40255 40280 40283 40285 40293 40415 40462 40477 40490 40502 40562 40577-40578 40623 40631 40635 40640 40682 40807 40830 40882 40935 40974 41053 41121 41148 41157-41158 41175 41206 41214 41224 41258 41270 41281 41311 41314 41326 41330 41341 41364 41373 41376 41390 41511 41654 41702 41724 41729 41864 41876 42028 42039 42050 42208 42219 42226 42289 42306 42324 42347 42382 42386 42460 42493 42499 42607 42652-42653 42867 42910 42915 42920 42973-42974 42989 43030 43050 43102 43115 43268 43280 43302 43320-43321 43350 43352 43371 43377 43391 43402 43420 43458 43505 43542 43567 43593 43606-43607 43656 43667 43722 43724 43796 43804 43854 43882 43912 43929 43947 43949 43972 44037 44098 44116 44240 44245 44278 44395 44518 44586 44660 44666 44674 44893 44926 45098 45129 45175 45242 45294 45310 45391 45415 45417 45447 45451 45487 45580 45633 45635 45671 45696 45763 45786 45819 45854 45890 45893 45929 45948 45955 45959 45962 45973 46045 46130 46151 46340 46429 46493 46500 46604 46848 47113 47131-47132 47147 47161 47181 47215 47240 47255 47278 47319 47374 47433 47525 47537 47645 47692 47696 47726 47760 47778 478201.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/137/A4201?format=asciiX-rayOpticaldefaultJ/PASP/137/A4201/cv_300Catalog of candidate CVs and AM CVns out to 300cGLONGalactic longitude (LII)degpos.galactic.lonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIAUNameeROSITA name, 1eRASS JHHMMSS.s+DDMMSS (IAUNAME)meta.id;meta.maincharRAJ2000eROSITA right ascension (J2000) (RA_1)degpos.eq.ra;meta.mainDEJ2000eROSITA declination (J2000) (DEC_1)degpos.eq.dec;meta.mainposErrX-ray positional error (POS_ERR)arcsecstat.error;posdoubleGLATGalactic latitude (BII)degpos.galactic.latdoubleEXTX-ray extent (arcsec) (EXT)arcsecphys.angSizefloatDetLike0X-ray detection likelihood (DET_LIKE_0)stat.likelihooddoubleMLFlux1X-ray (0.2-2.3keV) flux (erg/s/cm^2^) (ML_FLUX_1)mW.m**-2phot.flux;em.X-raydoublee_MLFlux1X-ray (0.2-2.3keV) flux error (ML_FLUX_ERR_1)mW.m**-2stat.errordoubleRAGdegGaia right ascension (J2000) (ra_epoch2000)degpos.eq.raDEGdegGaia declination (J2000) (dec_epoch2000)degpos.eq.decGaiaDR3Gaia source id (source_id)meta.idRAIdegGaia right ascension (ICRS) at Ep=2016.0 (ra_x)degpos.eq.raDEIdegGaia declination (ICRS) at Ep=2016.0 (dec_x)degpos.eq.decPlxParallax (parallax)maspos.parallaxfloate_PlxParallax error (parallax_error)masstat.error;pos.parallaxfloatRPlxParallax over error (parallax_over_error)stat.fit.omcdoublePMTotal proper motion (pm)mas/yrpos.pmfloatpmRAProper motion in right ascension, (pmRA*cosDE (pmra)mas/yrpos.pm;pos.eq.radoublee_pmRAProper motion in right ascension error (pmra_error)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declination (pmdec)mas/yrpos.pm;pos.eq.decdoublee_pmDEProper motion in declination error (pmdec_error)mas/yrstat.error;pos.pm;pos.eq.decfloatRUWEGaia RUWE (ruwe)stat.errorfloatGmagGaia G magnitude (phot_g_mean_mag)magphot.mag;em.optdoubleBPmagGaia BP magnitude (phot_bp_mean_mag)magphot.mag;em.opt.BdoubleRPmagGaia RP magnitude (phot_rp_mean_mag)magphot.mag;em.opt.RdoubleBP-RPGaia BP-RP colour (bp_rp)phot.color;em.opt.B;em.opt.RdoubleSepSeparation between X-ray and optical (angDist)arcsecpos.angDistancedoubleFx/FoptX-ray to optical flux ratio (Fx/Fopt)phot.flux;arith.ratiodoubleGMAGAbsolute G magnitude (Gabs)magphys.magAbsdoubleLXX-ray luminosity (erg/s) (L_X)1e-07Wphys.luminosity;em.X-raydoubleJ/PASP/137/A4201/cv_1000Catalog of candidate CVs and AM CVns out to 1000pcrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIAUNameeROSITA name, 1eRASS JHHMMSS.s+DDMMSS (IAUNAME)meta.id;meta.maincharRAJ2000eROSITA right ascension (J2000) (RA_1)degpos.eq.ra;meta.mainDEJ2000eROSITA declination (J2000) (DEC_1)degpos.eq.dec;meta.mainposErrX-ray positional error (POS_ERR)arcsecstat.error;posdoubleGLONGalactic longitude (LII)degpos.galactic.lonGLATGalactic latitude (BII)degpos.galactic.latdoubleEXTX-ray extent (arcsec) (EXT)arcsecphys.angSizefloatDetLike0X-ray detection likelihood (DET_LIKE_0)stat.likelihooddoubleMLFlux1X-ray (0.2-2.3keV) flux (erg/s/cm^2^) (ML_FLUX_1)mW.m**-2phot.flux;em.X-raydoublee_MLFlux1X-ray (0.2-2.3keV) flux error (ML_FLUX_ERR_1)mW.m**-2stat.errordoubleRAGdegGaia right ascension (J2000) (ra_epoch2000)degpos.eq.raDEGdegGaia declination (J2000) (dec_epoch2000)degpos.eq.decGaiaDR3Gaia source id (source_id)meta.idRAIdegGaia right ascension (ICRS) at Ep=2016.0 (ra_x)degpos.eq.raDEIdegGaia declination (ICRS) at Ep=2016.0 (dec_x)degpos.eq.decPlxParallax (parallax)maspos.parallaxfloate_PlxParallax error (parallax_error)masstat.error;pos.parallaxfloatRPlxParallax over error (parallax_over_error)stat.fit.omcdoublePMTotal proper motion (pm)mas/yrpos.pmfloatpmRAProper motion in right ascension, (pmRA*cosDE (pmra)mas/yrpos.pm;pos.eq.radoublee_pmRAProper motion in right ascension error (pmra_error)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declination (pmdec)mas/yrpos.pm;pos.eq.decdoublee_pmDEProper motion in declination error (pmdec_error)mas/yrstat.error;pos.pm;pos.eq.decfloatRUWEGaia RUWE (ruwe)stat.errorfloatGmagGaia G magnitude (phot_g_mean_mag)magphot.mag;em.optdoubleBPmagGaia BP magnitude (phot_bp_mean_mag)magphot.mag;em.opt.BdoubleRPmagGaia RP magnitude (phot_rp_mean_mag)magphot.mag;em.opt.RdoubleBP-RPGaia BP-RP colour (bp_rp)phot.color;em.opt.B;em.opt.RdoubleSepSeparation between X-ray and optical (angDist)arcsecpos.angDistancedoubleFx/FoptX-ray to optical flux ratio (Fx/Fopt)phot.flux;arith.ratiodoubleGMAGAbsolute G magnitude (Gabs)magphys.magAbsdoubleLXX-ray luminosity (erg/s) (L_X)1e-07Wphys.luminosity;em.X-raydouble